diff --git a/examples/Basic/AnalogMeter/AnalogMeter.ino b/examples/Basic/AnalogMeter/AnalogMeter.ino
index 548adb94..45d70ab9 100644
--- a/examples/Basic/AnalogMeter/AnalogMeter.ino
+++ b/examples/Basic/AnalogMeter/AnalogMeter.ino
@@ -20,8 +20,8 @@ M5GFX display;
 //M5AtomDisplay display;  // default setting
 //M5AtomDisplay display ( 320, 180 ); // width, height
 
-// #include <M5UnitPoEP4HDMI.h>
-// M5UnitPoEP4HDMI display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
+// #include <M5UnitPoEP4DisplayOut.h>
+// M5UnitPoEP4DisplayOut display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
 
 
 static constexpr float deg_to_rad = 0.017453292519943295769236907684886;
diff --git a/examples/Basic/BarGraph/BarGraph.ino b/examples/Basic/BarGraph/BarGraph.ino
index d9b9eb71..0f84c46a 100644
--- a/examples/Basic/BarGraph/BarGraph.ino
+++ b/examples/Basic/BarGraph/BarGraph.ino
@@ -17,8 +17,8 @@ M5GFX display;
 // #include <M5AtomDisplay.h>
 // M5AtomDisplay display;
 
-//#include <M5UnitPoEP4HDMI.h>
-//M5UnitPoEP4HDMI display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
+//#include <M5UnitPoEP4DisplayOut.h>
+//M5UnitPoEP4DisplayOut display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
 
 static constexpr size_t BAR_COUNT = 64;
 static int max_y[BAR_COUNT];
diff --git a/examples/Basic/GameOfLife/GameOfLife.ino b/examples/Basic/GameOfLife/GameOfLife.ino
index 0993dd6f..8d59659f 100644
--- a/examples/Basic/GameOfLife/GameOfLife.ino
+++ b/examples/Basic/GameOfLife/GameOfLife.ino
@@ -22,8 +22,8 @@ M5GFX display;
 //#include <M5AtomDisplay.h>
 //M5AtomDisplay display;
 
-//#include <M5UnitPoEP4HDMI.h>
-//M5UnitPoEP4HDMI display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
+//#include <M5UnitPoEP4DisplayOut.h>
+//M5UnitPoEP4DisplayOut display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
 
 M5Canvas canvas[2];
 
diff --git a/examples/Basic/LongTextScroll/LongTextScroll.ino b/examples/Basic/LongTextScroll/LongTextScroll.ino
index c871f269..edee885e 100644
--- a/examples/Basic/LongTextScroll/LongTextScroll.ino
+++ b/examples/Basic/LongTextScroll/LongTextScroll.ino
@@ -17,8 +17,8 @@ M5GFX display;
 //#include <M5AtomDisplay.h>
 //M5AtomDisplay display;
 
-//#include <M5UnitPoEP4HDMI.h>
-//M5UnitPoEP4HDMI display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
+//#include <M5UnitPoEP4DisplayOut.h>
+//M5UnitPoEP4DisplayOut display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
 
 M5Canvas canvas(&display);
 
diff --git a/examples/Basic/ScrollGraph/ScrollGraph.ino b/examples/Basic/ScrollGraph/ScrollGraph.ino
index 14914d52..652796e2 100644
--- a/examples/Basic/ScrollGraph/ScrollGraph.ino
+++ b/examples/Basic/ScrollGraph/ScrollGraph.ino
@@ -20,8 +20,8 @@ M5GFX display;
 //#include <M5AtomDisplay.h>
 //M5AtomDisplay display;
 
-//#include <M5UnitPoEP4HDMI.h>
-//M5UnitPoEP4HDMI display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
+//#include <M5UnitPoEP4DisplayOut.h>
+//M5UnitPoEP4DisplayOut display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
 
 
 #define LINE_COUNT 6
diff --git a/examples/Basic/SpinTile/SpinTile.ino b/examples/Basic/SpinTile/SpinTile.ino
index 28f098a2..5f85ff38 100644
--- a/examples/Basic/SpinTile/SpinTile.ino
+++ b/examples/Basic/SpinTile/SpinTile.ino
@@ -18,8 +18,8 @@ M5GFX display;
 //M5AtomDisplay display;  // default setting
 //M5AtomDisplay display ( 320, 180 ); // width, height
 
-//#include <M5UnitPoEP4HDMI.h>
-//M5UnitPoEP4HDMI display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
+//#include <M5UnitPoEP4DisplayOut.h>
+//M5UnitPoEP4DisplayOut display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
 
 static constexpr const int qsintab[256]={
     0x8000,0x80c9,0x8192,0x825b,0x8324,0x83ee,0x84b7,0x8580,
diff --git a/examples/Basic/TFT_graphicstest_PDQ/TFT_graphicstest_PDQ.ino b/examples/Basic/TFT_graphicstest_PDQ/TFT_graphicstest_PDQ.ino
index 28b8b356..d9451c26 100644
--- a/examples/Basic/TFT_graphicstest_PDQ/TFT_graphicstest_PDQ.ino
+++ b/examples/Basic/TFT_graphicstest_PDQ/TFT_graphicstest_PDQ.ino
@@ -18,8 +18,8 @@ M5GFX tft;
 // M5AtomDisplay tft(480, 270);
 // M5AtomDisplay tft(320, 180);
 
-// #include <M5UnitPoEP4HDMI.h>
-// M5UnitPoEP4HDMI tft; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
+// #include <M5UnitPoEP4DisplayOut.h>
+// M5UnitPoEP4DisplayOut tft; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
 /*
    M5AtomDisplay tft( 240     // width
                     , 360     // height
diff --git a/examples/Basic/TextLogScroll/TextLogScroll.ino b/examples/Basic/TextLogScroll/TextLogScroll.ino
index 8aec03c8..bf77e946 100644
--- a/examples/Basic/TextLogScroll/TextLogScroll.ino
+++ b/examples/Basic/TextLogScroll/TextLogScroll.ino
@@ -18,8 +18,8 @@ M5GFX display;
 //M5AtomDisplay display;  // default setting
 //M5AtomDisplay display ( 320, 180 ); // width, height
 
-//#include <M5UnitPoEP4HDMI.h>
-//M5UnitPoEP4HDMI display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
+//#include <M5UnitPoEP4DisplayOut.h>
+//M5UnitPoEP4DisplayOut display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
 
 static constexpr char text0[] = "hello world";
 static constexpr char text1[] = "this";
diff --git a/examples/Basic/drawImageData/drawImageData.ino b/examples/Basic/drawImageData/drawImageData.ino
index 4661da9e..a0e727c5 100644
--- a/examples/Basic/drawImageData/drawImageData.ino
+++ b/examples/Basic/drawImageData/drawImageData.ino
@@ -25,8 +25,8 @@ M5GFX display;
 //#include <M5AtomDisplay.h>
 //M5AtomDisplay display;
 
-//#include <M5UnitPoEP4HDMI.h>
-//M5UnitPoEP4HDMI display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
+//#include <M5UnitPoEP4DisplayOut.h>
+//M5UnitPoEP4DisplayOut display; // 1280x720@60 or 1920x1080@30 only; default 1280x720@60
 
 extern const uint8_t jpg[];
 
diff --git a/extras/board_spec/README.md b/extras/board_spec/README.md
index 9db3a45a..a55db225 100644
--- a/extras/board_spec/README.md
+++ b/extras/board_spec/README.md
@@ -129,6 +129,8 @@ Write `detect_class` only when the class holds in every state detection can meet
 cold boot, software reset, wake from sleep, and after an interrupted detection.
 Measure each of these states on real hardware before writing a value.
 
+- Do not classify pins whose state users can change through buttons, connectors,
+  or headers. Validation rejects connector and button roles.
 - Use `up` / `down` / `floating` for pins defined by resistors alone.
 - Use `fixed` for a driven pin only when the driver is always powered. For example,
   an EPD BUSY output reads D normally and U while the EPD is in deep sleep, so it can
diff --git a/extras/board_spec/boards/m5stack_tab5.json b/extras/board_spec/boards/m5stack_tab5.json
index d52ac04e..d5fa8464 100644
--- a/extras/board_spec/boards/m5stack_tab5.json
+++ b/extras/board_spec/boards/m5stack_tab5.json
@@ -75,6 +75,36 @@
         "roles": "generated"
       }
     },
+    "8": {
+      "roles": [
+        "bus:wifi_sdio.d3"
+      ]
+    },
+    "9": {
+      "roles": [
+        "bus:wifi_sdio.d2"
+      ]
+    },
+    "10": {
+      "roles": [
+        "bus:wifi_sdio.d1"
+      ]
+    },
+    "11": {
+      "roles": [
+        "bus:wifi_sdio.d0"
+      ]
+    },
+    "12": {
+      "roles": [
+        "bus:wifi_sdio.clk"
+      ]
+    },
+    "13": {
+      "roles": [
+        "bus:wifi_sdio.cmd"
+      ]
+    },
     "16": {
       "roles": [
         "conn:mbus.2"
@@ -111,7 +141,8 @@
     "22": {
       "roles": [
         "dev:backlight.pwm"
-      ]
+      ],
+      "detect_class": "down"
     },
     "23": {
       "roles": [
@@ -342,6 +373,18 @@
       ],
       "preferred_host": 0,
       "fixed": false
+    },
+    "wifi_sdio": {
+      "kind": "sdmmc",
+      "signals": [
+        "clk",
+        "cmd",
+        "d0",
+        "d1",
+        "d2",
+        "d3"
+      ],
+      "fixed": false
     }
   },
   "devices": {
diff --git a/extras/board_spec/boards/m5stack_tab5x.json b/extras/board_spec/boards/m5stack_tab5x.json
index 728f9152..ba32ce77 100644
--- a/extras/board_spec/boards/m5stack_tab5x.json
+++ b/extras/board_spec/boards/m5stack_tab5x.json
@@ -74,6 +74,36 @@
         "roles": "generated"
       }
     },
+    "8": {
+      "roles": [
+        "bus:wifi_sdio.d3"
+      ]
+    },
+    "9": {
+      "roles": [
+        "bus:wifi_sdio.d2"
+      ]
+    },
+    "10": {
+      "roles": [
+        "bus:wifi_sdio.d1"
+      ]
+    },
+    "11": {
+      "roles": [
+        "bus:wifi_sdio.d0"
+      ]
+    },
+    "12": {
+      "roles": [
+        "bus:wifi_sdio.clk"
+      ]
+    },
+    "13": {
+      "roles": [
+        "bus:wifi_sdio.cmd"
+      ]
+    },
     "16": {
       "roles": [
         "conn:mbus.2"
@@ -110,7 +140,8 @@
     "22": {
       "roles": [
         "dev:backlight.pwm"
-      ]
+      ],
+      "detect_class": "down"
     },
     "23": {
       "roles": [
@@ -341,6 +372,18 @@
       ],
       "preferred_host": 0,
       "fixed": false
+    },
+    "wifi_sdio": {
+      "kind": "sdmmc",
+      "signals": [
+        "clk",
+        "cmd",
+        "d0",
+        "d1",
+        "d2",
+        "d3"
+      ],
+      "fixed": false
     }
   },
   "devices": {
diff --git a/extras/board_spec/boards/m5stampp4.json b/extras/board_spec/boards/m5stampp4.json
new file mode 100644
index 00000000..6655b6b6
--- /dev/null
+++ b/extras/board_spec/boards/m5stampp4.json
@@ -0,0 +1,11 @@
+{
+  "schema_version": 1,
+  "id": "m5stampp4",
+  "name": "M5StampP4",
+  "official_name": "M5StampP4",
+  "legacy_board_id": 150,
+  "chip": "esp32p4",
+  "pins": {},
+  "buses": {},
+  "devices": {}
+}
diff --git a/extras/board_spec/boards/m5stampp4x.json b/extras/board_spec/boards/m5stampp4x.json
new file mode 100644
index 00000000..5c0aaaf4
--- /dev/null
+++ b/extras/board_spec/boards/m5stampp4x.json
@@ -0,0 +1,11 @@
+{
+  "schema_version": 1,
+  "id": "m5stampp4x",
+  "name": "M5StampP4X",
+  "official_name": "M5StampP4X",
+  "legacy_board_id": 156,
+  "chip": "esp32p4",
+  "pins": {},
+  "buses": {},
+  "devices": {}
+}
diff --git a/extras/board_spec/boards/m5stamps3mini.json b/extras/board_spec/boards/m5stamps3mini.json
index e4aa1fc5..bd720747 100644
--- a/extras/board_spec/boards/m5stamps3mini.json
+++ b/extras/board_spec/boards/m5stamps3mini.json
@@ -3,7 +3,7 @@
   "id": "m5stamps3mini",
   "name": "M5StampS3Mini",
   "official_name": "M5Stack M5StampS3Mini",
-  "legacy_board_id": 150,
+  "legacy_board_id": 155,
   "chip": "esp32s3",
   "pins": {
     "1": {
diff --git a/extras/board_spec/boards/m5unitpoep4.json b/extras/board_spec/boards/m5unitpoep4.json
new file mode 100644
index 00000000..0674031d
--- /dev/null
+++ b/extras/board_spec/boards/m5unitpoep4.json
@@ -0,0 +1,95 @@
+{
+  "schema_version": 1,
+  "id": "m5unitpoep4",
+  "name": "M5UnitPoEP4",
+  "official_name": "M5Stack Unit PoE-P4",
+  "legacy_board_id": 148,
+  "chip": "esp32p4",
+  "pins": {
+    "0": {
+      "roles": [
+        "bus:internal_i2c.sda"
+      ],
+      "verified": {
+        "roles": "generated"
+      }
+    },
+    "1": {
+      "roles": [
+        "bus:internal_i2c.scl"
+      ],
+      "verified": {
+        "roles": "generated"
+      }
+    },
+    "31": {
+      "roles": [
+        "dev:ethernet.mdc"
+      ],
+      "detect_class": "up"
+    },
+    "32": {
+      "roles": [],
+      "detect_class": "floating"
+    },
+    "45": {
+      "roles": [
+        "dev:btn_a.in"
+      ]
+    },
+    "52": {
+      "roles": [
+        "dev:ethernet.mdio"
+      ],
+      "detect_class": "up"
+    },
+    "53": {
+      "roles": [
+        "conn:port_a.2"
+      ],
+      "verified": {
+        "roles": "generated"
+      }
+    },
+    "54": {
+      "roles": [
+        "conn:port_a.1"
+      ],
+      "verified": {
+        "roles": "generated"
+      }
+    }
+  },
+  "buses": {
+    "internal_i2c": {
+      "kind": "i2c",
+      "signals": [
+        "sda",
+        "scl"
+      ],
+      "fixed": false,
+      "verified": {
+        "signals": "generated"
+      }
+    }
+  },
+  "devices": {
+    "ethernet": {
+      "kind": "transceiver"
+    },
+    "btn_a": {
+      "kind": "button",
+      "part": "button",
+      "spec": {
+        "active_low": true,
+        "pull": "external_up"
+      }
+    }
+  },
+  "connectors": {
+    "port_a": {
+      "type": "hy2_4p",
+      "standard": "port_i2c"
+    }
+  }
+}
diff --git a/extras/board_spec/detector_order.json b/extras/board_spec/detector_order.json
index 3d9ce0a7..341d9ac0 100644
--- a/extras/board_spec/detector_order.json
+++ b/extras/board_spec/detector_order.json
@@ -122,10 +122,53 @@
     ]
   },
   "esp32p4_detectors": {
-    "chip": "esp32p4", "source": "src/board_detect/m5/esp32p4.inl", "output": "esp32p4_detector_order.hpp",
+    "chip": "esp32p4",
+    "source": "src/board_detect/m5/esp32p4.inl",
+    "output": "esp32p4_detector_order.hpp",
     "families": [
-      { "detector": "corep4x_detector", "boards": ["m5stack_corep4x"] },
-      { "detector": "tab5_family_detector", "boards": ["m5stack_tab5", "m5stack_tab5x"] }
+      {
+        "detector": "corep4x_detector",
+        "boards": [
+          "m5stack_corep4x"
+        ]
+      },
+      {
+        "detector": "tab5_family_detector",
+        "boards": [
+          "m5stack_tab5",
+          "m5stack_tab5x"
+        ]
+      },
+      {
+        "detector": "unitpoep4_detector",
+        "boards": [
+          "m5unitpoep4"
+        ]
+      },
+      {
+        "detector": "stampp4_detector",
+        "boards": [
+          "m5stampp4",
+          "m5stampp4x"
+        ]
+      }
+    ],
+    "constraints": [
+      {
+        "before": "corep4x_detector",
+        "after": "tab5_family_detector",
+        "reason": "Probe the CoreP4X internal devices before Tab5"
+      },
+      {
+        "before": "tab5_family_detector",
+        "after": "unitpoep4_detector",
+        "reason": "Probe Tab5 internal devices before driving Ethernet management pins"
+      },
+      {
+        "before": "unitpoep4_detector",
+        "after": "stampp4_detector",
+        "reason": "StampP4 is only a fallback candidate after all P4 probes"
+      }
     ]
   }
 }
diff --git a/extras/board_spec/dist/board_spec_editor.html b/extras/board_spec/dist/board_spec_editor.html
index fde07d05..7c1145e8 100644
--- a/extras/board_spec/dist/board_spec_editor.html
+++ b/extras/board_spec/dist/board_spec_editor.html
@@ -909,6 +909,8 @@ <h2 id="board-dialog-title"></h2>
     "validation.E_PSRAM_PINS": { "en": "PSRAM pins do not match the chip definition", "zh": "PSRAM 引脚与芯片定义不一致", "ja": "PSRAM ピンがチップ定義と一致しません" },
     "validation.E_PSRAM_CONFLICT": { "en": "PSRAM conflicts with another signal", "zh": "PSRAM 与其他信号冲突", "ja": "PSRAM が別の信号と衝突しています" },
     "validation.E_PIN_KEY": { "en": "A SoC pin key is invalid or outside the chip range", "zh": "SoC pin key 无效或超出芯片范围", "ja": "SoC pin key が不正かチップ範囲外です" },
+    "validation.E_DETECT_CLASS_CONNECTOR": { "en": "Detection cannot classify user connector pins", "zh": "检测不可使用用户连接器引脚", "ja": "利用者のコネクタピンは判別に使えません" },
+    "validation.E_DETECT_CLASS_BUTTON": { "en": "Detection cannot classify user button pins", "zh": "检测不可使用用户按钮引脚", "ja": "利用者のボタンピンは判別に使えません" },
     "validation.E_DETECT_CLASS_NO_PULL": { "en": "Detection classification requires internal GPIO pulls", "zh": "检测分类需要 GPIO 内部上下拉", "ja": "判別分類には GPIO の内部プルが必要です" },
     "validation.E_CHIP_ABSENT": { "en": "This GPIO number does not exist on the chip", "zh": "该 GPIO 编号在芯片上不存在", "ja": "この GPIO 番号はチップに存在しません" },
     "validation.E_CHIP_PACKAGE": { "en": "The chip package variant is unknown", "zh": "芯片封装变体未知", "ja": "チップの package variant が不明です" },
@@ -956,13 +958,13 @@ <h2 id="board-dialog-title"></h2>
   }
   </script>
 
-  <script type="application/json" id="board-spec-schema">{"$schema":"http://json-schema.org/draft-07/schema#","$id":"https://m5stack.example/schema/board-spec-v1.json","title":"M5 board specification v1","type":"object","x-editor":{"pinColumns":[{"id":"gpio","label":"GPIO"},{"id":"roles","label":"roles"},{"id":"pull","label":"pull"},{"id":"detect_class","label":"detect_class"},{"id":"note","label":"note"},{"id":"verified","label":"verified"},{"id":"validation","label":"検証"}]},"additionalProperties":false,"required":["schema_version","id","name","official_name","legacy_board_id","chip","pins","buses","devices"],"properties":{"schema_version":{"const":1},"id":{"$ref":"#/definitions/id"},"name":{"type":"string","minLength":1},"official_name":{"type":"string","minLength":1},"official_name_verified":{"type":"boolean","description":"True when the product-name portion matches the official documentation page title. For M5Stack products, the leading 'M5Stack ' is a catalog naming-rule prefix rather than part of the verified page title. Absence means 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MISO","verified":{"roles":"generated"}}},"buses":{"main_spi":{"kind":"spi","signals":["sclk","mosi","miso"],"preferred_host":"SPI2_HOST","fixed":false,"freq":40000000,"freq_read":10000000,"verified":{"signals":"generated","preferred_host":"generated","freq":"generated","freq_read":"generated"}},"internal_i2c":{"kind":"i2c","signals":["sda","scl"],"preferred_host":0,"fixed":false,"freq":100000,"verified":{"signals":"generated","preferred_host":"generated","freq":"generated"}}},"devices":{"oled":{"kind":"display","part":"ssd1306","bus":"main_spi","spec":{"width":64,"height":48,"offset_x":32,"offset_y":0,"rotation_offset":0,"readable":true,"three_wire":true}},"power_hold":{"kind":"power_hold","spec":{"active_low":false}},"ioe":{"kind":"io_expander","part":"pi4io","bus":"internal_i2c","i2c_addr":"0x43","pins":{"p0":{"roles":["dev:btn_a.in"]}}},"btn_a":{"kind":"button","part":"button","spec":{"active_low":true,"pull":"internal_up"}}},"connectors":{"port_b":{"type":"hy2_4p","standard":"port_io"},"port_c":{"type":"hy2_4p","standard":"port_uart"}}},"m5unitpoep4":{"schema_version":1,"id":"m5unitpoep4","name":"M5UnitPoEP4","official_name":"M5Stack Unit PoE-P4","legacy_board_id":148,"chip":"esp32p4","pins":{"0":{"roles":["bus:internal_i2c.sda"],"verified":{"roles":"generated"}},"1":{"roles":["bus:internal_i2c.scl"],"verified":{"roles":"generated"}},"31":{"roles":["dev:ethernet.mdc"],"detect_class":"up"},"32":{"roles":[],"detect_class":"floating"},"45":{"roles":["dev:btn_a.in"]},"52":{"roles":["dev:ethernet.mdio"],"detect_class":"up"},"53":{"roles":["conn:port_a.2"],"verified":{"roles":"generated"}},"54":{"roles":["conn:port_a.1"],"verified":{"roles":"generated"}}},"buses":{"internal_i2c":{"kind":"i2c","signals":["sda","scl"],"fixed":false,"verified":{"signals":"generated"}}},"devices":{"ethernet":{"kind":"transceiver"},"btn_a":{"kind":"button","part":"button","spec":{"active_low":true,"pull":"external_up"}}},"connectors":{"port_a":{"type":"hy2_4p","standard":"port_i2c"}}},"m5vameter":{"schema_version":1,"id":"m5vameter","name":"M5VAMeter","official_name":"M5Stack VAMeter","official_name_verified":true,"aliases":["vameter","va meter","voltage and amperage meter"],"legacy_board_id":16,"chip":"esp32s3","spec":{"display":{"resolution":[240,240],"touch":false},"storage":{"psram_mb":0,"sd":false}},"pins":{"0":{"roles":["dev:btn_b.in"]},"2":{"roles":["dev:btn_a.in"]},"5":{"roles":["bus:internal_i2c.sda"],"note":"System I2C SDA","verified":{"roles":"generated"}},"6":{"roles":["bus:internal_i2c.scl"],"note":"System I2C SCL","verified":{"roles":"generated"}},"7":{"roles":[],"note":"Not connected"},"8":{"roles":["bus:port_a_i2c.sda","conn:port_a.2"],"note":"External Port A SDA","verified":{"roles":"generated"}},"9":{"roles":["bus:port_a_i2c.scl","conn:port_a.1"],"note":"External Port A SCL","verified":{"roles":"generated"}},"33":{"roles":["dev:lcd.rst"]},"34":{"roles":["dev:lcd.dc"]},"35":{"roles":["bus:main_spi.mosi"],"verified":{"roles":"generated"}},"36":{"roles":["bus:main_spi.sclk"],"verified":{"roles":"generated"}},"37":{"roles":["dev:lcd.cs"]},"38":{"roles":["dev:backlight.pwm"]}},"buses":{"main_spi":{"kind":"spi","signals":["sclk","mosi"],"preferred_host":"SPI3_HOST","fixed":false,"freq":40000000,"freq_read":16000000,"verified":{"signals":"generated","preferred_host":"generated","freq":"generated","freq_read":"generated"}},"internal_i2c":{"kind":"i2c","signals":["sda","scl"],"preferred_host":1,"fixed":false,"verified":{"signals":"generated","preferred_host":"generated"}},"port_a_i2c":{"kind":"i2c","signals":["sda","scl"],"preferred_host":0,"fixed":false,"verified":{"signals":"generated","preferred_host":"generated"}}},"devices":{"lcd":{"kind":"display","part":"st7789v2","bus":"main_spi","spec":{"width":240,"height":240,"offset_x":0,"offset_y":0,"rotation_offset":0,"invert":true,"readable":true}},"backlight":{"kind":"backlight","spec":{"freq":512,"channel":7,"invert":false,"offset":64},"verified":{"spec":"generated"}},"probe_device_0":{"kind":"sensor","bus":"internal_i2c","i2c_addr":"0x40","verified":{"i2c_addr":"datasheet"}},"probe_device_1":{"kind":"sensor","bus":"internal_i2c","i2c_addr":"0x41","verified":{"i2c_addr":"datasheet"}},"btn_a":{"kind":"button","part":"button","spec":{"active_low":true,"pull":"external_up"}},"btn_b":{"kind":"button","part":"button","spec":{"active_low":true,"pull":"external_up"}}},"connectors":{"port_a":{"type":"hy2_4p","standard":"port_i2c"}}}}</script>
   <script>
 // lib/model.js
 // Pure model helpers shared by the Node CLI and the future browser editor.
@@ -3060,6 +3062,17 @@ <h2 id="board-dialog-title"></h2>
   validatePinKeys(board, chip, errors);
   const checkDetectClasses = (pins, prefix) => {
     for (const [gpio, pin] of Object.entries(pins ?? {})) {
+      if (pin.detect_class !== undefined) {
+        if ((pin.roles ?? []).some((role) => /(?:^|\/)conn:/.test(role))) {
+          errors.push(error("E_DETECT_CLASS_CONNECTOR", `${prefix}/${gpio}/detect_class`, "detect_class cannot use a user connector pin"));
+        }
+        if ((pin.roles ?? []).some((role) => {
+          const match = /^dev:([^.]*)\./.exec(role);
+          return match && board.devices?.[match[1]]?.kind === "button";
+        })) {
+          errors.push(error("E_DETECT_CLASS_BUTTON", `${prefix}/${gpio}/detect_class`, "detect_class cannot use a user button pin"));
+        }
+      }
       if (pin.detect_class !== undefined && (chip.no_internal_pull ?? []).includes(Number(gpio))) {
         errors.push(error("E_DETECT_CLASS_NO_PULL", `${prefix}/${gpio}/detect_class`, "detect_class requires internal GPIO pulls"));
       }
diff --git a/extras/board_spec/editor/index.html b/extras/board_spec/editor/index.html
index 83b62cfd..e1001f7a 100644
--- a/extras/board_spec/editor/index.html
+++ b/extras/board_spec/editor/index.html
@@ -465,6 +465,8 @@ <h2 id="board-dialog-title"></h2>
     "validation.E_PSRAM_PINS": { "en": "PSRAM pins do not match the chip definition", "zh": "PSRAM 引脚与芯片定义不一致", "ja": "PSRAM ピンがチップ定義と一致しません" },
     "validation.E_PSRAM_CONFLICT": { "en": "PSRAM conflicts with another signal", "zh": "PSRAM 与其他信号冲突", "ja": "PSRAM が別の信号と衝突しています" },
     "validation.E_PIN_KEY": { "en": "A SoC pin key is invalid or outside the chip range", "zh": "SoC pin key 无效或超出芯片范围", "ja": "SoC pin key が不正かチップ範囲外です" },
+    "validation.E_DETECT_CLASS_CONNECTOR": { "en": "Detection cannot classify user connector pins", "zh": "检测不可使用用户连接器引脚", "ja": "利用者のコネクタピンは判別に使えません" },
+    "validation.E_DETECT_CLASS_BUTTON": { "en": "Detection cannot classify user button pins", "zh": "检测不可使用用户按钮引脚", "ja": "利用者のボタンピンは判別に使えません" },
     "validation.E_DETECT_CLASS_NO_PULL": { "en": "Detection classification requires internal GPIO pulls", "zh": "检测分类需要 GPIO 内部上下拉", "ja": "判別分類には GPIO の内部プルが必要です" },
     "validation.E_CHIP_ABSENT": { "en": "This GPIO number does not exist on the chip", "zh": "该 GPIO 编号在芯片上不存在", "ja": "この GPIO 番号はチップに存在しません" },
     "validation.E_CHIP_PACKAGE": { "en": "The chip package variant is unknown", "zh": "芯片封装变体未知", "ja": "チップの package variant が不明です" },
diff --git a/extras/board_spec/generated/m5unified_pin_table/esp32p4.inl b/extras/board_spec/generated/m5unified_pin_table/esp32p4.inl
index 4f8c59f8..e206ce28 100644
--- a/extras/board_spec/generated/m5unified_pin_table/esp32p4.inl
+++ b/extras/board_spec/generated/m5unified_pin_table/esp32p4.inl
@@ -6,6 +6,9 @@
 { board_t::board_M5CoreP4X, 9, 11, 16, 18 },
 { board_t::board_M5Tab5, 32, 31, 54, 53 },
 { board_t::board_M5Tab5X, 32, 31, 54, 53 },
+{ board_t::board_M5StampP4, 255, 255, 255, 255 },
+{ board_t::board_M5StampP4X, 255, 255, 255, 255 },
+{ board_t::board_M5UnitPoEP4, 1, 0, 54, 53 },
 { board_t::board_unknown, 22, 21, 33, 32 },
 
 // _pin_table_port_bc[][5]
diff --git a/extras/board_spec/generated/m5unified_pin_table/esp32p4.json b/extras/board_spec/generated/m5unified_pin_table/esp32p4.json
index 6bb57430..eab700a3 100644
--- a/extras/board_spec/generated/m5unified_pin_table/esp32p4.json
+++ b/extras/board_spec/generated/m5unified_pin_table/esp32p4.json
@@ -154,5 +154,161 @@
     "mbus_pin28": 255,
     "mbus_pin29": 255,
     "mbus_pin30": 255
+  },
+  "m5stampp4": {
+    "in_i2c_scl": 255,
+    "in_i2c_sda": 255,
+    "port_a_pin1": 255,
+    "port_a_pin2": 255,
+    "port_b_pin1": 255,
+    "port_b_pin2": 255,
+    "port_c_pin1": 255,
+    "port_c_pin2": 255,
+    "port_d_pin1": 255,
+    "port_d_pin2": 255,
+    "port_e_pin1": 255,
+    "port_e_pin2": 255,
+    "sd_mmc_clk": 255,
+    "sd_mmc_cmd": 255,
+    "sd_mmc_d0": 255,
+    "sd_mmc_d1": 255,
+    "sd_mmc_d2": 255,
+    "sd_mmc_d3": 255,
+    "rgb_led": 255,
+    "power_hold": 255,
+    "mbus_pin1": 255,
+    "mbus_pin2": 255,
+    "mbus_pin3": 255,
+    "mbus_pin4": 255,
+    "mbus_pin5": 255,
+    "mbus_pin6": 255,
+    "mbus_pin7": 255,
+    "mbus_pin8": 255,
+    "mbus_pin9": 255,
+    "mbus_pin10": 255,
+    "mbus_pin11": 255,
+    "mbus_pin12": 255,
+    "mbus_pin13": 255,
+    "mbus_pin14": 255,
+    "mbus_pin15": 255,
+    "mbus_pin16": 255,
+    "mbus_pin17": 255,
+    "mbus_pin18": 255,
+    "mbus_pin19": 255,
+    "mbus_pin20": 255,
+    "mbus_pin21": 255,
+    "mbus_pin22": 255,
+    "mbus_pin23": 255,
+    "mbus_pin24": 255,
+    "mbus_pin25": 255,
+    "mbus_pin26": 255,
+    "mbus_pin27": 255,
+    "mbus_pin28": 255,
+    "mbus_pin29": 255,
+    "mbus_pin30": 255
+  },
+  "m5stampp4x": {
+    "in_i2c_scl": 255,
+    "in_i2c_sda": 255,
+    "port_a_pin1": 255,
+    "port_a_pin2": 255,
+    "port_b_pin1": 255,
+    "port_b_pin2": 255,
+    "port_c_pin1": 255,
+    "port_c_pin2": 255,
+    "port_d_pin1": 255,
+    "port_d_pin2": 255,
+    "port_e_pin1": 255,
+    "port_e_pin2": 255,
+    "sd_mmc_clk": 255,
+    "sd_mmc_cmd": 255,
+    "sd_mmc_d0": 255,
+    "sd_mmc_d1": 255,
+    "sd_mmc_d2": 255,
+    "sd_mmc_d3": 255,
+    "rgb_led": 255,
+    "power_hold": 255,
+    "mbus_pin1": 255,
+    "mbus_pin2": 255,
+    "mbus_pin3": 255,
+    "mbus_pin4": 255,
+    "mbus_pin5": 255,
+    "mbus_pin6": 255,
+    "mbus_pin7": 255,
+    "mbus_pin8": 255,
+    "mbus_pin9": 255,
+    "mbus_pin10": 255,
+    "mbus_pin11": 255,
+    "mbus_pin12": 255,
+    "mbus_pin13": 255,
+    "mbus_pin14": 255,
+    "mbus_pin15": 255,
+    "mbus_pin16": 255,
+    "mbus_pin17": 255,
+    "mbus_pin18": 255,
+    "mbus_pin19": 255,
+    "mbus_pin20": 255,
+    "mbus_pin21": 255,
+    "mbus_pin22": 255,
+    "mbus_pin23": 255,
+    "mbus_pin24": 255,
+    "mbus_pin25": 255,
+    "mbus_pin26": 255,
+    "mbus_pin27": 255,
+    "mbus_pin28": 255,
+    "mbus_pin29": 255,
+    "mbus_pin30": 255
+  },
+  "m5unitpoep4": {
+    "in_i2c_scl": 1,
+    "in_i2c_sda": 0,
+    "port_a_pin1": 54,
+    "port_a_pin2": 53,
+    "port_b_pin1": 255,
+    "port_b_pin2": 255,
+    "port_c_pin1": 255,
+    "port_c_pin2": 255,
+    "port_d_pin1": 255,
+    "port_d_pin2": 255,
+    "port_e_pin1": 255,
+    "port_e_pin2": 255,
+    "sd_mmc_clk": 255,
+    "sd_mmc_cmd": 255,
+    "sd_mmc_d0": 255,
+    "sd_mmc_d1": 255,
+    "sd_mmc_d2": 255,
+    "sd_mmc_d3": 255,
+    "rgb_led": 255,
+    "power_hold": 255,
+    "mbus_pin1": 255,
+    "mbus_pin2": 255,
+    "mbus_pin3": 255,
+    "mbus_pin4": 255,
+    "mbus_pin5": 255,
+    "mbus_pin6": 255,
+    "mbus_pin7": 255,
+    "mbus_pin8": 255,
+    "mbus_pin9": 255,
+    "mbus_pin10": 255,
+    "mbus_pin11": 255,
+    "mbus_pin12": 255,
+    "mbus_pin13": 255,
+    "mbus_pin14": 255,
+    "mbus_pin15": 255,
+    "mbus_pin16": 255,
+    "mbus_pin17": 255,
+    "mbus_pin18": 255,
+    "mbus_pin19": 255,
+    "mbus_pin20": 255,
+    "mbus_pin21": 255,
+    "mbus_pin22": 255,
+    "mbus_pin23": 255,
+    "mbus_pin24": 255,
+    "mbus_pin25": 255,
+    "mbus_pin26": 255,
+    "mbus_pin27": 255,
+    "mbus_pin28": 255,
+    "mbus_pin29": 255,
+    "mbus_pin30": 255
   }
 }
diff --git a/extras/board_spec/generated/resolved/m5stack_tab5+lcd=ili9881c.json b/extras/board_spec/generated/resolved/m5stack_tab5+lcd=ili9881c.json
index ff8a13a2..2ed7524a 100644
--- a/extras/board_spec/generated/resolved/m5stack_tab5+lcd=ili9881c.json
+++ b/extras/board_spec/generated/resolved/m5stack_tab5+lcd=ili9881c.json
@@ -75,6 +75,36 @@
         "roles": "generated"
       }
     },
+    "8": {
+      "roles": [
+        "bus:wifi_sdio.d3"
+      ]
+    },
+    "9": {
+      "roles": [
+        "bus:wifi_sdio.d2"
+      ]
+    },
+    "10": {
+      "roles": [
+        "bus:wifi_sdio.d1"
+      ]
+    },
+    "11": {
+      "roles": [
+        "bus:wifi_sdio.d0"
+      ]
+    },
+    "12": {
+      "roles": [
+        "bus:wifi_sdio.clk"
+      ]
+    },
+    "13": {
+      "roles": [
+        "bus:wifi_sdio.cmd"
+      ]
+    },
     "16": {
       "roles": [
         "conn:mbus.2"
@@ -111,7 +141,8 @@
     "22": {
       "roles": [
         "dev:backlight.pwm"
-      ]
+      ],
+      "detect_class": "down"
     },
     "23": {
       "roles": [
@@ -342,6 +373,18 @@
       ],
       "preferred_host": 0,
       "fixed": false
+    },
+    "wifi_sdio": {
+      "kind": "sdmmc",
+      "signals": [
+        "clk",
+        "cmd",
+        "d0",
+        "d1",
+        "d2",
+        "d3"
+      ],
+      "fixed": false
     }
   },
   "devices": {
diff --git a/extras/board_spec/generated/resolved/m5stack_tab5+lcd=st7121.json b/extras/board_spec/generated/resolved/m5stack_tab5+lcd=st7121.json
index 5fa8d357..f2811cd4 100644
--- a/extras/board_spec/generated/resolved/m5stack_tab5+lcd=st7121.json
+++ b/extras/board_spec/generated/resolved/m5stack_tab5+lcd=st7121.json
@@ -75,6 +75,36 @@
         "roles": "generated"
       }
     },
+    "8": {
+      "roles": [
+        "bus:wifi_sdio.d3"
+      ]
+    },
+    "9": {
+      "roles": [
+        "bus:wifi_sdio.d2"
+      ]
+    },
+    "10": {
+      "roles": [
+        "bus:wifi_sdio.d1"
+      ]
+    },
+    "11": {
+      "roles": [
+        "bus:wifi_sdio.d0"
+      ]
+    },
+    "12": {
+      "roles": [
+        "bus:wifi_sdio.clk"
+      ]
+    },
+    "13": {
+      "roles": [
+        "bus:wifi_sdio.cmd"
+      ]
+    },
     "16": {
       "roles": [
         "conn:mbus.2"
@@ -111,7 +141,8 @@
     "22": {
       "roles": [
         "dev:backlight.pwm"
-      ]
+      ],
+      "detect_class": "down"
     },
     "23": {
       "roles": [
@@ -342,6 +373,18 @@
       ],
       "preferred_host": 0,
       "fixed": false
+    },
+    "wifi_sdio": {
+      "kind": "sdmmc",
+      "signals": [
+        "clk",
+        "cmd",
+        "d0",
+        "d1",
+        "d2",
+        "d3"
+      ],
+      "fixed": false
     }
   },
   "devices": {
diff --git a/extras/board_spec/generated/resolved/m5stack_tab5+lcd=st7123.json b/extras/board_spec/generated/resolved/m5stack_tab5+lcd=st7123.json
index f415792a..fcd5042d 100644
--- a/extras/board_spec/generated/resolved/m5stack_tab5+lcd=st7123.json
+++ b/extras/board_spec/generated/resolved/m5stack_tab5+lcd=st7123.json
@@ -75,6 +75,36 @@
         "roles": "generated"
       }
     },
+    "8": {
+      "roles": [
+        "bus:wifi_sdio.d3"
+      ]
+    },
+    "9": {
+      "roles": [
+        "bus:wifi_sdio.d2"
+      ]
+    },
+    "10": {
+      "roles": [
+        "bus:wifi_sdio.d1"
+      ]
+    },
+    "11": {
+      "roles": [
+        "bus:wifi_sdio.d0"
+      ]
+    },
+    "12": {
+      "roles": [
+        "bus:wifi_sdio.clk"
+      ]
+    },
+    "13": {
+      "roles": [
+        "bus:wifi_sdio.cmd"
+      ]
+    },
     "16": {
       "roles": [
         "conn:mbus.2"
@@ -111,7 +141,8 @@
     "22": {
       "roles": [
         "dev:backlight.pwm"
-      ]
+      ],
+      "detect_class": "down"
     },
     "23": {
       "roles": [
@@ -342,6 +373,18 @@
       ],
       "preferred_host": 0,
       "fixed": false
+    },
+    "wifi_sdio": {
+      "kind": "sdmmc",
+      "signals": [
+        "clk",
+        "cmd",
+        "d0",
+        "d1",
+        "d2",
+        "d3"
+      ],
+      "fixed": false
     }
   },
   "devices": {
diff --git a/extras/board_spec/generated/resolved/m5stack_tab5x+lcd=ili9881c.json b/extras/board_spec/generated/resolved/m5stack_tab5x+lcd=ili9881c.json
index 6d1094c5..b61832da 100644
--- a/extras/board_spec/generated/resolved/m5stack_tab5x+lcd=ili9881c.json
+++ b/extras/board_spec/generated/resolved/m5stack_tab5x+lcd=ili9881c.json
@@ -74,6 +74,36 @@
         "roles": "generated"
       }
     },
+    "8": {
+      "roles": [
+        "bus:wifi_sdio.d3"
+      ]
+    },
+    "9": {
+      "roles": [
+        "bus:wifi_sdio.d2"
+      ]
+    },
+    "10": {
+      "roles": [
+        "bus:wifi_sdio.d1"
+      ]
+    },
+    "11": {
+      "roles": [
+        "bus:wifi_sdio.d0"
+      ]
+    },
+    "12": {
+      "roles": [
+        "bus:wifi_sdio.clk"
+      ]
+    },
+    "13": {
+      "roles": [
+        "bus:wifi_sdio.cmd"
+      ]
+    },
     "16": {
       "roles": [
         "conn:mbus.2"
@@ -110,7 +140,8 @@
     "22": {
       "roles": [
         "dev:backlight.pwm"
-      ]
+      ],
+      "detect_class": "down"
     },
     "23": {
       "roles": [
@@ -341,6 +372,18 @@
       ],
       "preferred_host": 0,
       "fixed": false
+    },
+    "wifi_sdio": {
+      "kind": "sdmmc",
+      "signals": [
+        "clk",
+        "cmd",
+        "d0",
+        "d1",
+        "d2",
+        "d3"
+      ],
+      "fixed": false
     }
   },
   "devices": {
diff --git a/extras/board_spec/generated/resolved/m5stack_tab5x+lcd=st7121.json b/extras/board_spec/generated/resolved/m5stack_tab5x+lcd=st7121.json
index 306447a9..63469020 100644
--- a/extras/board_spec/generated/resolved/m5stack_tab5x+lcd=st7121.json
+++ b/extras/board_spec/generated/resolved/m5stack_tab5x+lcd=st7121.json
@@ -74,6 +74,36 @@
         "roles": "generated"
       }
     },
+    "8": {
+      "roles": [
+        "bus:wifi_sdio.d3"
+      ]
+    },
+    "9": {
+      "roles": [
+        "bus:wifi_sdio.d2"
+      ]
+    },
+    "10": {
+      "roles": [
+        "bus:wifi_sdio.d1"
+      ]
+    },
+    "11": {
+      "roles": [
+        "bus:wifi_sdio.d0"
+      ]
+    },
+    "12": {
+      "roles": [
+        "bus:wifi_sdio.clk"
+      ]
+    },
+    "13": {
+      "roles": [
+        "bus:wifi_sdio.cmd"
+      ]
+    },
     "16": {
       "roles": [
         "conn:mbus.2"
@@ -110,7 +140,8 @@
     "22": {
       "roles": [
         "dev:backlight.pwm"
-      ]
+      ],
+      "detect_class": "down"
     },
     "23": {
       "roles": [
@@ -341,6 +372,18 @@
       ],
       "preferred_host": 0,
       "fixed": false
+    },
+    "wifi_sdio": {
+      "kind": "sdmmc",
+      "signals": [
+        "clk",
+        "cmd",
+        "d0",
+        "d1",
+        "d2",
+        "d3"
+      ],
+      "fixed": false
     }
   },
   "devices": {
diff --git a/extras/board_spec/generated/resolved/m5stack_tab5x+lcd=st7123.json b/extras/board_spec/generated/resolved/m5stack_tab5x+lcd=st7123.json
index 8b983388..4768778a 100644
--- a/extras/board_spec/generated/resolved/m5stack_tab5x+lcd=st7123.json
+++ b/extras/board_spec/generated/resolved/m5stack_tab5x+lcd=st7123.json
@@ -74,6 +74,36 @@
         "roles": "generated"
       }
     },
+    "8": {
+      "roles": [
+        "bus:wifi_sdio.d3"
+      ]
+    },
+    "9": {
+      "roles": [
+        "bus:wifi_sdio.d2"
+      ]
+    },
+    "10": {
+      "roles": [
+        "bus:wifi_sdio.d1"
+      ]
+    },
+    "11": {
+      "roles": [
+        "bus:wifi_sdio.d0"
+      ]
+    },
+    "12": {
+      "roles": [
+        "bus:wifi_sdio.clk"
+      ]
+    },
+    "13": {
+      "roles": [
+        "bus:wifi_sdio.cmd"
+      ]
+    },
     "16": {
       "roles": [
         "conn:mbus.2"
@@ -110,7 +140,8 @@
     "22": {
       "roles": [
         "dev:backlight.pwm"
-      ]
+      ],
+      "detect_class": "down"
     },
     "23": {
       "roles": [
@@ -341,6 +372,18 @@
       ],
       "preferred_host": 0,
       "fixed": false
+    },
+    "wifi_sdio": {
+      "kind": "sdmmc",
+      "signals": [
+        "clk",
+        "cmd",
+        "d0",
+        "d1",
+        "d2",
+        "d3"
+      ],
+      "fixed": false
     }
   },
   "devices": {
diff --git a/extras/board_spec/generated/resolved/m5stampp4.json b/extras/board_spec/generated/resolved/m5stampp4.json
new file mode 100644
index 00000000..6655b6b6
--- /dev/null
+++ b/extras/board_spec/generated/resolved/m5stampp4.json
@@ -0,0 +1,11 @@
+{
+  "schema_version": 1,
+  "id": "m5stampp4",
+  "name": "M5StampP4",
+  "official_name": "M5StampP4",
+  "legacy_board_id": 150,
+  "chip": "esp32p4",
+  "pins": {},
+  "buses": {},
+  "devices": {}
+}
diff --git a/extras/board_spec/generated/resolved/m5stampp4x.json b/extras/board_spec/generated/resolved/m5stampp4x.json
new file mode 100644
index 00000000..5c0aaaf4
--- /dev/null
+++ b/extras/board_spec/generated/resolved/m5stampp4x.json
@@ -0,0 +1,11 @@
+{
+  "schema_version": 1,
+  "id": "m5stampp4x",
+  "name": "M5StampP4X",
+  "official_name": "M5StampP4X",
+  "legacy_board_id": 156,
+  "chip": "esp32p4",
+  "pins": {},
+  "buses": {},
+  "devices": {}
+}
diff --git a/extras/board_spec/generated/resolved/m5stamps3mini.json b/extras/board_spec/generated/resolved/m5stamps3mini.json
index 9aa3ce96..b82480d8 100644
--- a/extras/board_spec/generated/resolved/m5stamps3mini.json
+++ b/extras/board_spec/generated/resolved/m5stamps3mini.json
@@ -3,7 +3,7 @@
   "id": "m5stamps3mini",
   "name": "M5StampS3Mini",
   "official_name": "M5Stack M5StampS3Mini",
-  "legacy_board_id": 150,
+  "legacy_board_id": 155,
   "chip": "esp32s3",
   "pins": {
     "1": {
diff --git a/extras/board_spec/generated/resolved/m5unitpoep4.json b/extras/board_spec/generated/resolved/m5unitpoep4.json
new file mode 100644
index 00000000..fdb0fc98
--- /dev/null
+++ b/extras/board_spec/generated/resolved/m5unitpoep4.json
@@ -0,0 +1,111 @@
+{
+  "schema_version": 1,
+  "id": "m5unitpoep4",
+  "name": "M5UnitPoEP4",
+  "official_name": "M5Stack Unit PoE-P4",
+  "legacy_board_id": 148,
+  "chip": "esp32p4",
+  "pins": {
+    "0": {
+      "roles": [
+        "bus:internal_i2c.sda"
+      ],
+      "verified": {
+        "roles": "generated"
+      }
+    },
+    "1": {
+      "roles": [
+        "bus:internal_i2c.scl"
+      ],
+      "verified": {
+        "roles": "generated"
+      }
+    },
+    "31": {
+      "roles": [
+        "dev:ethernet.mdc"
+      ],
+      "detect_class": "up"
+    },
+    "32": {
+      "roles": [],
+      "detect_class": "floating"
+    },
+    "45": {
+      "roles": [
+        "dev:btn_a.in"
+      ]
+    },
+    "52": {
+      "roles": [
+        "dev:ethernet.mdio"
+      ],
+      "detect_class": "up"
+    },
+    "53": {
+      "roles": [
+        "conn:port_a.2"
+      ],
+      "verified": {
+        "roles": "generated"
+      }
+    },
+    "54": {
+      "roles": [
+        "conn:port_a.1"
+      ],
+      "verified": {
+        "roles": "generated"
+      }
+    }
+  },
+  "buses": {
+    "internal_i2c": {
+      "kind": "i2c",
+      "signals": [
+        "sda",
+        "scl"
+      ],
+      "fixed": false,
+      "verified": {
+        "signals": "generated"
+      }
+    }
+  },
+  "devices": {
+    "ethernet": {
+      "kind": "transceiver",
+      "signals": {
+        "mdc": "gpio:31",
+        "mdio": "gpio:52"
+      }
+    },
+    "btn_a": {
+      "kind": "button",
+      "part": "button",
+      "spec": {
+        "active_low": true,
+        "pull": "external_up"
+      },
+      "signals": {
+        "in": "gpio:45"
+      },
+      "verified": {
+        "signals": "generated"
+      }
+    }
+  },
+  "connectors": {
+    "port_a": {
+      "type": "hy2_4p",
+      "standard": "port_i2c",
+      "positions": {
+        "1": "gpio:54",
+        "2": "gpio:53",
+        "3": "pwr:5v",
+        "4": "pwr:gnd"
+      }
+    }
+  }
+}
diff --git a/extras/board_spec/lib/validate.js b/extras/board_spec/lib/validate.js
index 7a45c6ce..2d9a30e4 100644
--- a/extras/board_spec/lib/validate.js
+++ b/extras/board_spec/lib/validate.js
@@ -379,6 +379,17 @@ export function validateBoard(board, { schema, chip, connectorTypes = {}, parts
   validatePinKeys(board, chip, errors);
   const checkDetectClasses = (pins, prefix) => {
     for (const [gpio, pin] of Object.entries(pins ?? {})) {
+      if (pin.detect_class !== undefined) {
+        if ((pin.roles ?? []).some((role) => /(?:^|\/)conn:/.test(role))) {
+          errors.push(error("E_DETECT_CLASS_CONNECTOR", `${prefix}/${gpio}/detect_class`, "detect_class cannot use a user connector pin"));
+        }
+        if ((pin.roles ?? []).some((role) => {
+          const match = /^dev:([^.]*)\./.exec(role);
+          return match && board.devices?.[match[1]]?.kind === "button";
+        })) {
+          errors.push(error("E_DETECT_CLASS_BUTTON", `${prefix}/${gpio}/detect_class`, "detect_class cannot use a user button pin"));
+        }
+      }
       if (pin.detect_class !== undefined && (chip.no_internal_pull ?? []).includes(Number(gpio))) {
         errors.push(error("E_DETECT_CLASS_NO_PULL", `${prefix}/${gpio}/detect_class`, "detect_class requires internal GPIO pulls"));
       }
diff --git a/extras/board_spec/schema/board.schema.json b/extras/board_spec/schema/board.schema.json
index aaa18fc3..c18052cb 100644
--- a/extras/board_spec/schema/board.schema.json
+++ b/extras/board_spec/schema/board.schema.json
@@ -147,7 +147,7 @@
         "led": ["on", "pwm"],
         "vibration": ["enable"],
         "camera": ["pwdn", "reset", "xclk", "vsync", "href", "pclk", "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7"],
-        "transceiver": ["de", "re"],
+        "transceiver": ["de", "re", "mdc", "mdio"],
         "regulator": ["en"],
         "button": ["in"],
         "usb_uart": ["boot"],
diff --git a/extras/board_spec/targets.json b/extras/board_spec/targets.json
index 2157002b..7067f6d0 100644
--- a/extras/board_spec/targets.json
+++ b/extras/board_spec/targets.json
@@ -126,7 +126,7 @@
       "m5atoms3rext": {"chip": "esp32s3", "legacy_board_id": 143, "cpp_namespace": "atoms3rext", "board_enum": "board_M5AtomS3RExt", "desc_name": "desc_atoms3rext", "wiring_fields": ["i2c"], "wiring_output": "esp32s3_wiring.hpp", "desc_internal_i2c": true, "probe_pins": [9, 12, 18, 21]},
       "m5atomvoices3r": {"chip": "esp32s3", "legacy_board_id": 145, "cpp_namespace": "atomvoices3r", "board_enum": "board_M5AtomVoiceS3R", "desc_name": "desc_atomvoices3r", "wiring_fields": ["i2c"], "wiring_output": "esp32s3_wiring.hpp", "desc_internal_i2c": true},
       "m5stamps3bat": {"chip": "esp32s3", "legacy_board_id": 149, "cpp_namespace": "stamps3bat", "board_enum": "board_M5StampS3Bat", "desc_name": "desc_stamps3bat", "wiring_fields": ["i2c"], "wiring_output": "esp32s3_wiring.hpp", "desc_internal_i2c": true},
-      "m5stamps3mini": {"chip": "esp32s3", "legacy_board_id": 150, "cpp_namespace": "stamps3mini", "board_enum": "board_M5StampS3Mini", "desc_name": "desc_stamps3mini", "wiring_fields": ["i2c"], "wiring_output": "esp32s3_wiring.hpp", "desc_internal_i2c": true},
+      "m5stamps3mini": {"chip": "esp32s3", "legacy_board_id": 155, "cpp_namespace": "stamps3mini", "board_enum": "board_M5StampS3Mini", "desc_name": "desc_stamps3mini", "wiring_fields": ["i2c"], "wiring_output": "esp32s3_wiring.hpp", "desc_internal_i2c": true},
       "m5atoms3r": {
         "chip": "esp32s3", "legacy_board_id": 18, "cpp_namespace": "atoms3r", "board_enum": "board_M5AtomS3R", "desc_name": "desc_atoms3r",
         "wiring_fields": ["display", "i2c", "hold"], "reset": "display_rst", "wiring_output": "esp32s3_wiring.hpp",
@@ -232,6 +232,9 @@
         "wiring_fields": ["i2c"], "desc_internal_i2c": true, "wiring_output": "esp32p4_wiring.hpp",
         "specs_output": "esp32p4_specs.hpp"
       },
+      "m5unitpoep4": {"chip": "esp32p4", "legacy_board_id": 148, "board_enum": "board_M5UnitPoEP4", "cpp_namespace": "unitpoep4", "desc_name": "desc_unitpoep4", "wiring_fields": [], "wiring_output": "esp32p4_wiring.hpp"},
+      "m5stampp4": {"chip": "esp32p4", "legacy_board_id": 150, "board_enum": "board_M5StampP4"},
+      "m5stampp4x": {"chip": "esp32p4", "legacy_board_id": 156, "board_enum": "board_M5StampP4X"},
       "m5stack_tab5": {
         "chip": "esp32p4", "legacy_board_id": 22, "cpp_namespace": "tab5", "board_enum": "board_M5Tab5", "desc_name": "desc_tab5",
         "wiring_fields": ["i2c", "touch"], "desc_internal_i2c": true, "wiring_output": "esp32p4_wiring.hpp",
diff --git a/extras/board_spec/test/board_spec.test.js b/extras/board_spec/test/board_spec.test.js
index e3fe8109..cb98caec 100644
--- a/extras/board_spec/test/board_spec.test.js
+++ b/extras/board_spec/test/board_spec.test.js
@@ -82,7 +82,9 @@ const esp32h2Source = await fs.readFile(path.join(root, "../../src/board_detect/
 const esp32c6SetupSource = await fs.readFile(path.join(root, "../../src/board_detect/m5/esp32c6/c6_display_setup.inl"), "utf8");
 const esp32c61Source = await fs.readFile(path.join(root, "../../src/board_detect/m5/esp32c61/corematrix.inl"), "utf8");
 const esp32p4Source = (await fs.readFile(path.join(root, "../../src/board_detect/m5/esp32p4/corep4x.inl"), "utf8"))
-  + "\n" + (await fs.readFile(path.join(root, "../../src/board_detect/m5/esp32p4/tab5.inl"), "utf8"));
+  + "\n" + (await fs.readFile(path.join(root, "../../src/board_detect/m5/esp32p4/tab5.inl"), "utf8"))
+  + "\n" + (await fs.readFile(path.join(root, "../../src/board_detect/m5/esp32p4/unitpoep4.inl"), "utf8"))
+  + "\n" + (await fs.readFile(path.join(root, "../../src/board_detect/m5/esp32p4/stampp4.inl"), "utf8"));
 const tab5SetupSource = await fs.readFile(path.join(root, "../../src/board_detect/m5/esp32p4/tab5_setup.inl"), "utf8");
 const pmicOpsSource = await fs.readFile(path.join(root, "../../src/board_detect/m5/pmic_ops.hpp"), "utf8");
 const i18nMatch = /<script type="application\/json" id="board-spec-i18n">([\s\S]*?)<\/script>/.exec(editorHtml);
@@ -207,7 +209,7 @@ test("only catalog names confirmed against official sources carry the verified f
   };
   const unverified = catalogBoards.filter((item) => item.official_name_verified !== true).map((item) => item.id).sort();
   assert.deepEqual(unverified, [
-    "m5atom_psram", "m5atomlite", "m5atommatrix", "m5atoms3lite", "m5atoms3rcam", "m5atoms3rext", "m5atoms3u", "m5atomu", "m5atomvoice", "m5atomvoices3r", "m5capsule", "m5dualkey", "m5nanoc6", "m5nanoh2", "m5paperdiy", "m5powerhub", "m5stack", "m5stack_corematrix", "m5stack_tab5x", "m5stampc3", "m5stampc3u", "m5stampc5", "m5stampc6", "m5stamppico", "m5stamps3", "m5stamps3bat", "m5stamps3mini", "m5station", "m5toughc5",
+    "m5atom_psram", "m5atomlite", "m5atommatrix", "m5atoms3lite", "m5atoms3rcam", "m5atoms3rext", "m5atoms3u", "m5atomu", "m5atomvoice", "m5atomvoices3r", "m5capsule", "m5dualkey", "m5nanoc6", "m5nanoh2", "m5paperdiy", "m5powerhub", "m5stack", "m5stack_corematrix", "m5stack_tab5x", "m5stampc3", "m5stampc3u", "m5stampc5", "m5stampc6", "m5stampp4", "m5stampp4x", "m5stamppico", "m5stamps3", "m5stamps3bat", "m5stamps3mini", "m5station", "m5toughc5", "m5unitpoep4",
   ]);
   const verified = catalogBoards.filter((item) => item.official_name_verified === true).map((item) => item.id).sort();
   assert.deepEqual(verified, Object.keys(documentedProductNames).sort());
@@ -384,7 +386,7 @@ test("valid Core2 has only the expected target warning", () => {
 });
 
 test("all catalog boards validate against their chip tables", () => {
-  assert.deepEqual(catalogFiles, ["arduino_nesso_n1.json", "m5airq.json", "m5atom_psram.json", "m5atomlite.json", "m5atommatrix.json", "m5atoms3.json", "m5atoms3lite.json", "m5atoms3r.json", "m5atoms3rcam.json", "m5atoms3rext.json", "m5atoms3u.json", "m5atomu.json", "m5atomvoice.json", "m5atomvoices3r.json", "m5capsule.json", "m5cardputer.json", "m5cardputer_adv.json", "m5chaincaptain.json", "m5dial.json", "m5dinmeter.json", "m5dualkey.json", "m5nanoc6.json", "m5nanoh2.json", "m5paper.json", "m5papercolor.json", "m5paperdiy.json", "m5papermono.json", "m5papers3.json", "m5powerhub.json", "m5stack.json", "m5stack_core2.json", "m5stack_coreink.json", "m5stack_corematrix.json", "m5stack_corep4x.json", "m5stack_cores3.json", "m5stack_cores3se.json", "m5stack_stackchan.json", "m5stack_tab5.json", "m5stack_tab5x.json", "m5stampc3.json", "m5stampc3u.json", "m5stampc5.json", "m5stampc6.json", "m5stamplc.json", "m5stamppico.json", "m5stamps3.json", "m5stamps3bat.json", "m5stamps3mini.json", "m5station.json", "m5stickc.json", "m5stickcplus.json", "m5stickcplus2.json", "m5sticks3.json", "m5stopwatch.json", "m5timercam.json", "m5tough.json", "m5toughc5.json", "m5unit_c6l.json", "m5vameter.json"]);
+  assert.deepEqual(catalogFiles, ["arduino_nesso_n1.json", "m5airq.json", "m5atom_psram.json", "m5atomlite.json", "m5atommatrix.json", "m5atoms3.json", "m5atoms3lite.json", "m5atoms3r.json", "m5atoms3rcam.json", "m5atoms3rext.json", "m5atoms3u.json", "m5atomu.json", "m5atomvoice.json", "m5atomvoices3r.json", "m5capsule.json", "m5cardputer.json", "m5cardputer_adv.json", "m5chaincaptain.json", "m5dial.json", "m5dinmeter.json", "m5dualkey.json", "m5nanoc6.json", "m5nanoh2.json", "m5paper.json", "m5papercolor.json", "m5paperdiy.json", "m5papermono.json", "m5papers3.json", "m5powerhub.json", "m5stack.json", "m5stack_core2.json", "m5stack_coreink.json", "m5stack_corematrix.json", "m5stack_corep4x.json", "m5stack_cores3.json", "m5stack_cores3se.json", "m5stack_stackchan.json", "m5stack_tab5.json", "m5stack_tab5x.json", "m5stampc3.json", "m5stampc3u.json", "m5stampc5.json", "m5stampc6.json", "m5stamplc.json", "m5stampp4.json", "m5stampp4x.json", "m5stamppico.json", "m5stamps3.json", "m5stamps3bat.json", "m5stamps3mini.json", "m5station.json", "m5stickc.json", "m5stickcplus.json", "m5stickcplus2.json", "m5sticks3.json", "m5stopwatch.json", "m5timercam.json", "m5tough.json", "m5toughc5.json", "m5unit_c6l.json", "m5unitpoep4.json", "m5vameter.json"]);
   assert.deepEqual(validateCatalog(catalogBoards, (item) => ({ ...context, chip: chips[item.chip] })).filter((item) => item.severity !== "warning"), []);
 });
 
@@ -400,7 +402,7 @@ test("catalog button devices match M5Unified GPIO, expander, and PMIC inputs", (
     m5dinmeter: { btn_a: 42, btn_b: 0 }, m5sticks3: { btn_a: 11, btn_b: 12 },
     m5paperdiy: { btn_a: 4, btn_b: 3 }, m5papercolor: { btn_a: 10, btn_b: 9, btn_c: 1 },
     m5chaincaptain: { btn_a: 1, btn_b: 4, btn_c: 5 }, m5papermono: { btn_a: 2, btn_b: 3 },
-    m5stopwatch: { btn_a: 2, btn_b: 1 }, m5dualkey: { btn_a: 0, btn_b: 17 },
+    m5stopwatch: { btn_a: 2, btn_b: 1 }, m5unitpoep4: { btn_a: 45 }, m5dualkey: { btn_a: 0, btn_b: 17 },
   };
   const ownedButtons = {
     m5stamplc: { btn_a: "pin:ioe.p2", btn_b: "pin:ioe.p1", btn_c: "pin:ioe.p0" },
@@ -645,9 +647,9 @@ test("explicit fallback takes precedence over detector candidates", async (t) =>
   assert.match(defaults, /get_pkg_ver\(\) == 1\) \{ return board_t::board_M5StampS3Mini; \}/);
 });
 
-test("all 84 revision and runtime combinations match snapshots", async () => {
+test("all 87 revision and runtime combinations match snapshots", async () => {
   const outputs = catalogBoards.flatMap(resolveCatalog);
-  assert.equal(outputs.length, 84);
+  assert.equal(outputs.length, 87);
   for (const output of outputs) {
     const snapshot = await fs.readFile(path.join(root, "generated/resolved", output.filename), "utf8");
     assert.equal(snapshot, formatBoard(output.board), output.filename);
@@ -906,7 +908,7 @@ test("M5Unified live pin tables match generated values", async (t) => {
   catch { return t.skip(`M5Unified checkout not found (${m5unified})`); }
   const compared = spawnSync(process.execPath, ["cli/spec.js", "compare-pintable", "--m5unified", m5unified], { cwd: root, encoding: "utf8" });
   assert.equal(compared.status, 0, compared.stderr || compared.stdout);
-  assert.match(compared.stdout, /comparison passed: 51 board\(s\), 2550 value\(s\), 4 target\(s\)/);
+  assert.match(compared.stdout, /comparison passed: 54 board\(s\), 2700 value\(s\), 4 target\(s\)/);
 });
 
 test("M5GFX wiring emitter maps every board-description GPIO", () => {
@@ -2388,7 +2390,7 @@ test("gpio_power keeps the active-high hold level for existing members", () => {
 });
 
 test("no_display_pins is used only when a display has no GPIO bus or is absent", () => {
-  const allowed = new Set(["papers3", "paperdiy", "corematrix", "corep4x", "tab5", "tab5x", "atompsram", "atomvoice", "atommatrix", "atomlite", "atomu", "stamppico", "timercam", "nanoc6", "nanoh2", "stampc3", "stampc3u", "stampc5", "stampc6", "atoms3lite", "atoms3u", "stamps3", "dualkey", "capsule", "powerhub", "atoms3rcam", "atoms3rext", "atomvoices3r", "stamps3bat", "stamps3mini"]);
+  const allowed = new Set(["papers3", "paperdiy", "corematrix", "corep4x", "tab5", "tab5x", "atompsram", "atomvoice", "atommatrix", "atomlite", "atomu", "stamppico", "timercam", "nanoc6", "nanoh2", "stampc3", "stampc3u", "stampc5", "stampc6", "atoms3lite", "atoms3u", "stamps3", "dualkey", "capsule", "powerhub", "atoms3rcam", "atoms3rext", "atomvoices3r", "stamps3bat", "stamps3mini", "unitpoep4", "stampp4", "stampp4x"]);
   for (const source of [d0wdq6Source, esp32s3Source, esp32c3Source, esp32c5Source, esp32c6Source, esp32h2Source, esp32c61Source, esp32p4Source]) {
     const descs = [...source.matchAll(/static constexpr board_desc_t desc_([a-z0-9_]+) = \{([\s\S]*?)\n\s*\};/g)];
     assert.ok(descs.length > 0);
@@ -2434,7 +2436,7 @@ test("Tab5 touch identities select the three DSI panels", () => {
   assert.equal(specs.panels.st7123.vsync_front_porch, 220);
   assert.deepEqual(specs.backlight, { pin: 22, freq: 44100, channel: 7, invert: false, offset: 0 });
   assert.deepEqual(wiring.i2c, { sda: 31, scl: 32, port: 1 });
-  assert.deepEqual(detectionPinsForEntries([{ board: source, chip: chipP4, emitted: wiring }]), [23, 31, 32]);
+  assert.deepEqual(detectionPinsForEntries([{ board: source, chip: chipP4, emitted: wiring }]), [22, 23, 31, 32]);
   assert.match(esp32p4Source, /probe_i2c_bus_present\(ctx, tab5_detail::sda, tab5_detail::scl\)/);
   assert.match(esp32p4Source, /pi4io1_addr, pi4io_id_register[\s\S]*?is_pi4io\(value\)[\s\S]*?pi4io2_addr, pi4io_id_register[\s\S]*?is_pi4io\(value\)/);
 });
@@ -2695,3 +2697,15 @@ test("detect-only pins participate in capture, reservations and conditional touc
   source.spec.storage.psram_mode = "opi";
   assert.throws(() => validateDetectionPins(entries, chipS3), /GPIO 33 is reserved when PSRAM mode is opi/);
 });
+
+test("detect classes reject user connectors and buttons", () => {
+  const source = clone(catalogBoards.find((board) => board.id === "m5dial"));
+  const validate = () => validateBoard(source, { ...context, chip: chipS3 });
+  const connector = Object.entries(source.pins).find(([, pin]) => pin.roles.some((role) => role.startsWith("conn:")));
+  connector[1].detect_class = "up";
+  assert.ok(validate().some((issue) => issue.id === "E_DETECT_CLASS_CONNECTOR"));
+  delete connector[1].detect_class;
+  const button = Object.entries(source.pins).find(([, pin]) => pin.roles.includes("dev:btn_a.in"));
+  button[1].detect_class = "down";
+  assert.ok(validate().some((issue) => issue.id === "E_DETECT_CLASS_BUTTON"));
+});
diff --git a/extras/board_spec/test/detector_order.test.js b/extras/board_spec/test/detector_order.test.js
index 64cb2a1a..bb738eb1 100644
--- a/extras/board_spec/test/detector_order.test.js
+++ b/extras/board_spec/test/detector_order.test.js
@@ -87,7 +87,7 @@ test("GPIO power-hold catalog and M5GFX descriptions agree", async () => {
     const expected = hasGpioPowerHold(board);
     const files = ["esp32_d0wdq6.inl", "esp32_pico.inl", "esp32s3/families.inl", "esp32s3/cores3.inl",
       "esp32c3.inl", "esp32c5/toughc5.inl", "esp32c6/c6_display.inl", "esp32c6/c6_displayless.inl", "esp32h2.inl",
-      "esp32c61/corematrix.inl", "esp32p4/corep4x.inl", "esp32p4/tab5.inl"];
+      "esp32c61/corematrix.inl", "esp32p4/corep4x.inl", "esp32p4/tab5.inl", "esp32p4/unitpoep4.inl", "esp32p4/stampp4.inl"];
     const sources = await Promise.all(files.map((name) => fs.readFile(path.join(sourceRoot, "src/board_detect/m5", name), "utf8")));
     const source = sources.find((text) => text.includes(`${target.desc_name} = {`));
     assert.ok(source, id);
diff --git a/src/M5GFX.cpp b/src/M5GFX.cpp
index 0c119b82..d3a1db03 100644
--- a/src/M5GFX.cpp
+++ b/src/M5GFX.cpp
@@ -1190,36 +1190,32 @@ namespace m5gfx
 
     if (pkg_ver == 0) // pkg_ver == EFUSE_RD_CHIP_VER_PKG_
     {
-      if (board == 0 || board == board_t::board_M5CoreP4X
-                     || board == board_t::board_M5Tab5
-                     || board == board_t::board_M5Tab5X)
-      {
-        board_t setup_board = board_t::board_unknown;
-        if (try_setup_detected(board_detect::m5::esp32p4_detectors,
-                               board, use_reset, false, &board,
-                               [this, &setup_board](board_detect::m5::display_parts_t& parts)
-                               {
+      board_t setup_board = board_t::board_unknown;
+      if (try_setup_detected(board_detect::m5::esp32p4_detectors,
+                             board, use_reset, final_attempt, &board,
+                             [this, &setup_board](board_detect::m5::display_parts_t& parts)
+                             {
 #if defined (M5GFX_AUTODETECT_TEST_FAIL_COREP4X_SETUP)
-                                 if (setup_board == board_t::board_M5CoreP4X)
-                                 {
-                                   (void)parts;
-                                   return false;
-                                 }
+                               if (setup_board == board_t::board_M5CoreP4X)
+                               {
+                                 (void)parts;
+                                 return false;
+                               }
 #endif
 #if defined (M5GFX_AUTODETECT_TEST_FAIL_TAB5_SETUP)
-                                 if (setup_board == board_t::board_M5Tab5
-                                  || setup_board == board_t::board_M5Tab5X)
-                                 {
-                                   (void)parts;
-                                   return false;
-                                 }
+                               if (setup_board == board_t::board_M5Tab5
+                                || setup_board == board_t::board_M5Tab5X)
+                               {
+                                 (void)parts;
+                                 return false;
+                               }
 #endif
-                                 return _adopt_detected_parts(parts.bus, parts.panel,
-                                                              parts.light, parts.touch);
-                               }, nullptr, &setup_board, nullptr, no_signature))
-        {
-          goto init_clear;
-        }
+                               return _adopt_detected_parts(parts.bus, parts.panel,
+                                                            parts.light, parts.touch);
+                             }, nullptr, &setup_board, transient_fallback, no_signature,
+                             candidate_board))
+      {
+        goto init_clear;
       }
 
     }
diff --git a/src/M5UnitPoEP4DisplayOut.h b/src/M5UnitPoEP4DisplayOut.h
new file mode 100644
index 00000000..16cc9094
--- /dev/null
+++ b/src/M5UnitPoEP4DisplayOut.h
@@ -0,0 +1,178 @@
+#ifndef __M5GFX_M5UNITPOEP4DISPLAYOUT__
+#define __M5GFX_M5UNITPOEP4DISPLAYOUT__
+#define __M5GFX_M5UNITPOEP4HDMI__
+
+#include "M5GFX.h"
+
+#include <cstddef>
+#include <cstdint>
+#include <functional>
+
+#if __has_include(<sdkconfig.h>)
+#include <sdkconfig.h>
+#endif
+
+#if defined(CONFIG_IDF_TARGET_ESP32P4)
+#include <lgfx/v1/platforms/esp32p4/Bus_DSI.hpp>
+#include <lgfx/v1/platforms/esp32p4/Panel_LT8912B.hpp>
+#define M5UNITPOEP4DISPLAYOUT_ENABLED
+#define M5UNITPOEP4HDMI_ENABLED
+#endif
+
+class M5UnitPoEP4DisplayOut : public M5GFX
+{
+public:
+  struct config_t
+  {
+    // Supported timings: 1280x720@60 or 1920x1080@30 only.
+    uint16_t width = 1280;
+    uint16_t height = 720;
+    uint8_t refresh_rate = 60;
+    uint8_t fb_num = 1;
+
+    uint8_t dsi_bus_id = 0;
+    uint8_t dsi_lane_num = 2;
+    uint16_t dsi_lane_mbps = 1000;
+    uint8_t dsi_ldo_chan_id = 3;
+    uint16_t dsi_ldo_voltage_mv = 2500;
+
+    uint32_t i2c_freq = 100000;
+    lgfx::color_depth_t output_depth = lgfx::rgb888_nonswapped;
+
+    // I2C bus of the LT8912B bridge (lgfx::i2c). Negative = the board's internal bus
+    // (port 1, SDA 0, SCL 1); M5Unified fills these from In_I2C. An already open port
+    // is shared as it is. Alternatively an ESP-IDF driver bus the application owns.
+    int8_t i2c_port = -1;
+    int8_t pin_sda = -1;
+    int8_t pin_scl = -1;
+    void* i2c_master_bus = nullptr; // i2c_master_bus_handle_t
+  };
+
+  M5UnitPoEP4DisplayOut(void) : M5UnitPoEP4DisplayOut(config_t{}) {}
+
+  explicit M5UnitPoEP4DisplayOut(const config_t& cfg) : _config(cfg)
+  {
+    _board = lgfx::board_t::board_M5UnitPoEP4DisplayOut;
+  }
+
+  config_t config(void) const { return _config; }
+  // A config set here is final: anything a previous setI2C() captured is dropped.
+  void config(const config_t& cfg) { _config = cfg; _i2c_resolver = nullptr; }
+
+  // Kept for sketches that hand over an M5Unified I2C_Class (or anything with
+  // getPort / getSDA / getSCL returning small non-negative numbers). As before only
+  // a pointer is kept and the object is read when the display is initialized, so it
+  // has to stay alive until init(). While set it selects the bus, ahead of
+  // i2c_master_bus and of the port / pins in config_t, which are left untouched;
+  // config() or setI2C(nullptr) drops it again (pass nullptr, not 0 or NULL). A
+  // template so that this header needs nothing from M5Unified; the lambda body
+  // resolves at the call site, so the class has to be complete there (it is,
+  // wherever the object was created).
+  template <typename I2C>
+  void setI2C(I2C* i2c)
+  {
+    if (i2c == nullptr) { _i2c_resolver = nullptr; return; }
+    _i2c_resolver = [i2c](config_t& cfg) -> bool
+    {
+      const int port = i2c->getPort();
+      const int sda = i2c->getSDA();
+      const int scl = i2c->getSCL();
+      // not begun, or out of the range the config can hold: fail as the old code did
+      if (port < 0 || sda < 0 || scl < 0 || port > INT8_MAX || sda > INT8_MAX || scl > INT8_MAX) { return false; }
+      cfg.i2c_port = static_cast<int8_t>(port);
+      cfg.pin_sda = static_cast<int8_t>(sda);
+      cfg.pin_scl = static_cast<int8_t>(scl);
+      cfg.i2c_master_bus = nullptr;
+      return true;
+    };
+  }
+  void setI2C(std::nullptr_t) { _i2c_resolver = nullptr; }
+
+  static bool isSupportedTiming(uint16_t width, uint16_t height, uint8_t refresh_rate)
+  {
+    return (width == 1280 && height == 720 && refresh_rate == 60)
+        || (width == 1920 && height == 1080 && refresh_rate == 30);
+  }
+
+  bool init_impl(bool use_reset, bool use_clear) override
+  {
+    if (_panel_last.get() != nullptr) {
+      return true;
+    }
+
+#if defined(M5UNITPOEP4DISPLAYOUT_ENABLED)
+    config_t used = _config; // what setI2C() resolves goes here, so _config stays as the sketch set it
+    if (_i2c_resolver && !_i2c_resolver(used)) {
+#if defined(ESP_LOGE)
+      ESP_LOGE("M5UnitPoEP4DisplayOut", "the I2C object given to setI2C() is not started");
+#endif
+      return false;
+    }
+    if (!isSupportedTiming(_config.width, _config.height, _config.refresh_rate)) {
+#if defined(ESP_LOGE)
+      ESP_LOGE("M5UnitPoEP4DisplayOut", "unsupported timing: %ux%u@%u. Supported timings: 1280x720@60, 1920x1080@30",
+               static_cast<unsigned>(_config.width), static_cast<unsigned>(_config.height),
+               static_cast<unsigned>(_config.refresh_rate));
+#endif
+      return false;
+    }
+
+    auto bus = new lgfx::Bus_DSI();
+    auto panel = new lgfx::Panel_LT8912B();
+    if (!bus || !panel) {
+      delete panel;
+      delete bus;
+      return false;
+    }
+
+    {
+      auto cfg = bus->config();
+      cfg.bus_id = _config.dsi_bus_id;
+      cfg.lane_num = _config.dsi_lane_num;
+      cfg.lane_mbps = _config.dsi_lane_mbps;
+      cfg.ldo_chan_id = _config.dsi_ldo_chan_id;
+      cfg.ldo_voltage_mv = _config.dsi_ldo_voltage_mv;
+      bus->config(cfg);
+    }
+
+    {
+      auto cfg = panel->config_detail();
+      cfg.h_res = _config.width;
+      cfg.v_res = _config.height;
+      cfg.refresh_rate = _config.refresh_rate;
+      cfg.fb_num = _config.fb_num;
+      cfg.lane_num = _config.dsi_lane_num;
+      if (used.i2c_port >= 0) { cfg.i2c_port = used.i2c_port; }
+      if (used.pin_sda >= 0) { cfg.i2c_sda = used.pin_sda; }
+      if (used.pin_scl >= 0) { cfg.i2c_scl = used.pin_scl; }
+      cfg.i2c_master_bus = static_cast<i2c_master_bus_handle_t>(used.i2c_master_bus);
+      cfg.i2c_freq = _config.i2c_freq;
+      cfg.output_depth = _config.output_depth;
+      panel->config_detail(cfg);
+    }
+
+    panel->setBus(bus);
+    setPanel(panel);
+    _bus_last.reset(bus);
+    _panel_last.reset(panel);
+
+    if (lgfx::LGFX_Device::init_impl(use_reset, use_clear)) {
+      return true;
+    }
+
+    setPanel(nullptr);
+    _panel_last.reset();
+    _bus_last.reset();
+#endif
+
+    return false;
+  }
+
+protected:
+  config_t _config;
+  std::function<bool(config_t&)> _i2c_resolver; // false = the object handed to setI2C() is unusable
+};
+
+using M5UnitPoEP4HDMI __attribute__((deprecated("Use M5UnitPoEP4DisplayOut"))) = M5UnitPoEP4DisplayOut;
+
+#endif
diff --git a/src/M5UnitPoEP4HDMI.h b/src/M5UnitPoEP4HDMI.h
index 2ae89a93..335cb1c9 100644
--- a/src/M5UnitPoEP4HDMI.h
+++ b/src/M5UnitPoEP4HDMI.h
@@ -1,174 +1,3 @@
-#ifndef __M5GFX_M5UNITPOEP4HDMI__
-#define __M5GFX_M5UNITPOEP4HDMI__
+#pragma once
 
-#include "M5GFX.h"
-
-#include <cstddef>
-#include <cstdint>
-#include <functional>
-
-#if __has_include(<sdkconfig.h>)
-#include <sdkconfig.h>
-#endif
-
-#if defined(CONFIG_IDF_TARGET_ESP32P4)
-#include <lgfx/v1/platforms/esp32p4/Bus_DSI.hpp>
-#include <lgfx/v1/platforms/esp32p4/Panel_LT8912B.hpp>
-#define M5UNITPOEP4HDMI_ENABLED
-#endif
-
-class M5UnitPoEP4HDMI : public M5GFX
-{
-public:
-  struct config_t
-  {
-    // Supported timings: 1280x720@60 or 1920x1080@30 only.
-    uint16_t width = 1280;
-    uint16_t height = 720;
-    uint8_t refresh_rate = 60;
-    uint8_t fb_num = 1;
-
-    uint8_t dsi_bus_id = 0;
-    uint8_t dsi_lane_num = 2;
-    uint16_t dsi_lane_mbps = 1000;
-    uint8_t dsi_ldo_chan_id = 3;
-    uint16_t dsi_ldo_voltage_mv = 2500;
-
-    uint32_t i2c_freq = 100000;
-    lgfx::color_depth_t output_depth = lgfx::rgb888_nonswapped;
-
-    // I2C bus of the LT8912B bridge (lgfx::i2c). Negative = the board's internal bus
-    // (port 1, SDA 0, SCL 1); M5Unified fills these from In_I2C. An already open port
-    // is shared as it is. Alternatively an ESP-IDF driver bus the application owns.
-    int8_t i2c_port = -1;
-    int8_t pin_sda = -1;
-    int8_t pin_scl = -1;
-    void* i2c_master_bus = nullptr; // i2c_master_bus_handle_t
-  };
-
-  M5UnitPoEP4HDMI(void) : M5UnitPoEP4HDMI(config_t{}) {}
-
-  explicit M5UnitPoEP4HDMI(const config_t& cfg) : _config(cfg)
-  {
-    _board = lgfx::board_t::board_M5UnitPoEP4HDMI;
-  }
-
-  config_t config(void) const { return _config; }
-  // A config set here is final: anything a previous setI2C() captured is dropped.
-  void config(const config_t& cfg) { _config = cfg; _i2c_resolver = nullptr; }
-
-  // Kept for sketches that hand over an M5Unified I2C_Class (or anything with
-  // getPort / getSDA / getSCL returning small non-negative numbers). As before only
-  // a pointer is kept and the object is read when the display is initialized, so it
-  // has to stay alive until init(). While set it selects the bus, ahead of
-  // i2c_master_bus and of the port / pins in config_t, which are left untouched;
-  // config() or setI2C(nullptr) drops it again (pass nullptr, not 0 or NULL). A
-  // template so that this header needs nothing from M5Unified; the lambda body
-  // resolves at the call site, so the class has to be complete there (it is,
-  // wherever the object was created).
-  template <typename I2C>
-  void setI2C(I2C* i2c)
-  {
-    if (i2c == nullptr) { _i2c_resolver = nullptr; return; }
-    _i2c_resolver = [i2c](config_t& cfg) -> bool
-    {
-      const int port = i2c->getPort();
-      const int sda = i2c->getSDA();
-      const int scl = i2c->getSCL();
-      // not begun, or out of the range the config can hold: fail as the old code did
-      if (port < 0 || sda < 0 || scl < 0 || port > INT8_MAX || sda > INT8_MAX || scl > INT8_MAX) { return false; }
-      cfg.i2c_port = static_cast<int8_t>(port);
-      cfg.pin_sda = static_cast<int8_t>(sda);
-      cfg.pin_scl = static_cast<int8_t>(scl);
-      cfg.i2c_master_bus = nullptr;
-      return true;
-    };
-  }
-  void setI2C(std::nullptr_t) { _i2c_resolver = nullptr; }
-
-  static bool isSupportedTiming(uint16_t width, uint16_t height, uint8_t refresh_rate)
-  {
-    return (width == 1280 && height == 720 && refresh_rate == 60)
-        || (width == 1920 && height == 1080 && refresh_rate == 30);
-  }
-
-  bool init_impl(bool use_reset, bool use_clear) override
-  {
-    if (_panel_last.get() != nullptr) {
-      return true;
-    }
-
-#if defined(M5UNITPOEP4HDMI_ENABLED)
-    config_t used = _config; // what setI2C() resolves goes here, so _config stays as the sketch set it
-    if (_i2c_resolver && !_i2c_resolver(used)) {
-#if defined(ESP_LOGE)
-      ESP_LOGE("M5UnitPoEP4HDMI", "the I2C object given to setI2C() is not started");
-#endif
-      return false;
-    }
-    if (!isSupportedTiming(_config.width, _config.height, _config.refresh_rate)) {
-#if defined(ESP_LOGE)
-      ESP_LOGE("M5UnitPoEP4HDMI", "unsupported timing: %ux%u@%u. Supported timings: 1280x720@60, 1920x1080@30",
-               static_cast<unsigned>(_config.width), static_cast<unsigned>(_config.height),
-               static_cast<unsigned>(_config.refresh_rate));
-#endif
-      return false;
-    }
-
-    auto bus = new lgfx::Bus_DSI();
-    auto panel = new lgfx::Panel_LT8912B();
-    if (!bus || !panel) {
-      delete panel;
-      delete bus;
-      return false;
-    }
-
-    {
-      auto cfg = bus->config();
-      cfg.bus_id = _config.dsi_bus_id;
-      cfg.lane_num = _config.dsi_lane_num;
-      cfg.lane_mbps = _config.dsi_lane_mbps;
-      cfg.ldo_chan_id = _config.dsi_ldo_chan_id;
-      cfg.ldo_voltage_mv = _config.dsi_ldo_voltage_mv;
-      bus->config(cfg);
-    }
-
-    {
-      auto cfg = panel->config_detail();
-      cfg.h_res = _config.width;
-      cfg.v_res = _config.height;
-      cfg.refresh_rate = _config.refresh_rate;
-      cfg.fb_num = _config.fb_num;
-      cfg.lane_num = _config.dsi_lane_num;
-      if (used.i2c_port >= 0) { cfg.i2c_port = used.i2c_port; }
-      if (used.pin_sda >= 0) { cfg.i2c_sda = used.pin_sda; }
-      if (used.pin_scl >= 0) { cfg.i2c_scl = used.pin_scl; }
-      cfg.i2c_master_bus = static_cast<i2c_master_bus_handle_t>(used.i2c_master_bus);
-      cfg.i2c_freq = _config.i2c_freq;
-      cfg.output_depth = _config.output_depth;
-      panel->config_detail(cfg);
-    }
-
-    panel->setBus(bus);
-    setPanel(panel);
-    _bus_last.reset(bus);
-    _panel_last.reset(panel);
-
-    if (lgfx::LGFX_Device::init_impl(use_reset, use_clear)) {
-      return true;
-    }
-
-    setPanel(nullptr);
-    _panel_last.reset();
-    _bus_last.reset();
-#endif
-
-    return false;
-  }
-
-protected:
-  config_t _config;
-  std::function<bool(config_t&)> _i2c_resolver; // false = the object handed to setI2C() is unusable
-};
-
-#endif
+#include "M5UnitPoEP4DisplayOut.h"
diff --git a/src/board_detect/m5/esp32p4.inl b/src/board_detect/m5/esp32p4.inl
index a344d3a4..39480263 100644
--- a/src/board_detect/m5/esp32p4.inl
+++ b/src/board_detect/m5/esp32p4.inl
@@ -6,6 +6,7 @@
 #include "generated/esp32p4_wiring.hpp"
 #include "generated/esp32p4_specs.hpp"
 #include "pmic_ops.hpp"
+#include <esp_chip_info.h>
 
 namespace m5gfx
 {
@@ -15,12 +16,15 @@ namespace m5
 {
 #include "esp32p4/corep4x.inl"
 #include "esp32p4/tab5.inl"
+#include "esp32p4/unitpoep4.inl"
+#include "esp32p4/stampp4.inl"
 
 #include "generated/esp32p4_detector_order.hpp"
 static const board_entry_t esp32p4_boards[] = {
   { &desc_corep4x, construct_corep4x, "board_M5CoreP4X", nullptr },
   { &desc_tab5, construct_tab5, "board_M5Tab5", nullptr },
   { &desc_tab5x, construct_tab5, "board_M5Tab5X", nullptr },
+  { &desc_unitpoep4, construct_displayless, "board_M5UnitPoEP4", nullptr },
 };
 success_log_t success_log(const board_result_t& result) { return success_log(esp32p4_boards, result); }
 }
diff --git a/src/board_detect/m5/esp32p4/stampp4.inl b/src/board_detect/m5/esp32p4/stampp4.inl
new file mode 100644
index 00000000..11ecfac2
--- /dev/null
+++ b/src/board_detect/m5/esp32p4/stampp4.inl
@@ -0,0 +1,34 @@
+static constexpr board_desc_t desc_stampp4 = {
+  { static_cast<board_id_t>(lgfx::board_M5StampP4), "M5StampP4", def_flag_fallback },
+  no_power(), no_reset(), no_shared_sd(), no_display_pins(), no_pins(),
+  no_internal_i2c(), no_options(), no_pins(),
+  };
+static constexpr board_desc_t desc_stampp4x = {
+  { static_cast<board_id_t>(lgfx::board_M5StampP4X), "M5StampP4X", def_flag_fallback },
+  no_power(), no_reset(), no_shared_sd(), no_display_pins(), no_pins(),
+  no_internal_i2c(), no_options(), no_pins(),
+  };
+
+class stampp4_detector_t final : public board_detector_t
+{
+public:
+  stampp4_detector_t() : board_detector_t(members_) {}
+  bool signature(probe_ctx_t& ctx) const override
+  {
+    // A carrier can add pulls to any pin, so StampP4 is only a weak candidate.
+    if (ctx.candidate == nullptr)
+    {
+      esp_chip_info_t info;
+      esp_chip_info(&info);
+      ctx.candidate = info.revision >= 300 ? &desc_stampp4x.def : &desc_stampp4.def;
+    }
+    return false;
+  }
+  bool confirm(probe_ctx_t&, board_result_t*) const override { return false; }
+private:
+  static const board_def_t* const members_[3];
+};
+const board_def_t* const stampp4_detector_t::members_[3] = {
+  &desc_stampp4.def, &desc_stampp4x.def, nullptr,
+};
+static const stampp4_detector_t stampp4_detector;
diff --git a/src/board_detect/m5/esp32p4/tab5.inl b/src/board_detect/m5/esp32p4/tab5.inl
index 46206f57..145650eb 100644
--- a/src/board_detect/m5/esp32p4/tab5.inl
+++ b/src/board_detect/m5/esp32p4/tab5.inl
@@ -40,7 +40,22 @@ public:
   tab5_family_detector_t() : board_detector_t(members_) {}
   bool signature(probe_ctx_t& ctx) const override
   {
-    return probe_i2c_bus_present(ctx, tab5_detail::sda, tab5_detail::scl);
+    const detect_class_expected_t expected = {
+      wiring::tab5::detect_class_mask, wiring::tab5::detect_class_up,
+      wiring::tab5::detect_class_down, wiring::tab5::detect_class_floating,
+      wiring::tab5::detect_class_fixed,
+    };
+    const bool bus_present = probe_i2c_bus_present(ctx, tab5_detail::sda, tab5_detail::scl);
+    // Backlight wiring only suggests a recovery candidate; it must not gate
+    // PI4IO confirmation, which remains valid with the wireless supply off.
+    if (bus_present && ctx.candidate == nullptr
+     && match_detect_class(expected, probe_pin_pulls(ctx, expected.mask)))
+    {
+      esp_chip_info_t info;
+      esp_chip_info(&info);
+      ctx.candidate = info.revision >= 300 ? &desc_tab5x.def : &desc_tab5.def;
+    }
+    return bus_present;
   }
   bool confirm(probe_ctx_t& ctx, board_result_t* result) const override
   {
@@ -57,7 +72,19 @@ public:
     {
       return false;
     }
-    result->assign(ctx.hint == desc_tab5x.def.id ? &desc_tab5x : &desc_tab5);
+    // Tab5X upgrades the P4 silicon revision; saved hints cannot identify it.
+    esp_chip_info_t info;
+    esp_chip_info(&info);
+    const auto* desc = info.revision >= 300 ? &desc_tab5x : &desc_tab5;
+    if ((ctx.hint == desc_tab5.def.id || ctx.hint == desc_tab5x.def.id)
+     && ctx.hint != desc->def.id)
+    {
+      ESP_LOGW("M5GFX", "[Autodetect] Tab5 hint:%u disagrees with chip revision:%u; using %s",
+               static_cast<unsigned>(ctx.hint), static_cast<unsigned>(info.revision),
+               desc->def.name);
+    }
+    result->assign(desc);
+    result->candidate = ctx.candidate;
     return true;
   }
 private:
diff --git a/src/board_detect/m5/esp32p4/unitpoep4.inl b/src/board_detect/m5/esp32p4/unitpoep4.inl
new file mode 100644
index 00000000..d877ad89
--- /dev/null
+++ b/src/board_detect/m5/esp32p4/unitpoep4.inl
@@ -0,0 +1,100 @@
+namespace unitpoep4_detail
+{
+  constexpr int mdc = 31;
+  constexpr int mdio = 52;
+  static constexpr std::int8_t gpio_pins[] = { mdc, mdio };
+
+  // Open-drain signaling: output latches stay Low; High releases the pin.
+  inline void drive(int pin, bool high)
+  {
+    if (high) { lgfx::pinMode(pin, lgfx::pin_mode_t::input); }
+    else
+    {
+      lgfx::gpio_lo(pin);
+      lgfx::pinMode(pin, lgfx::pin_mode_t::output);
+    }
+  }
+
+  inline int read_phy_register(int reg)
+  {
+    auto clock = []()
+    {
+      drive(mdc, true);
+      lgfx::delayMicroseconds(2);
+      drive(mdc, false);
+    };
+    auto bit_out = [&](bool bit)
+    {
+      drive(mdio, bit);
+      lgfx::delayMicroseconds(2);
+      clock();
+    };
+    auto bit_in = [&]()
+    {
+      // IP101 changes MDIO after the rising edge; sample while MDC is Low.
+      lgfx::delayMicroseconds(2);
+      const bool bit = lgfx::gpio_in(mdio);
+      clock();
+      return bit;
+    };
+    drive(mdc, false);
+    // The first frame after boot needs more than the usual 32 preamble bits.
+    for (int i = 0; i < 64; ++i) { bit_out(true); }
+    bit_out(false); bit_out(true); // ST = 01
+    bit_out(true); bit_out(false); // OP = read
+    for (int i = 4; i >= 0; --i) { bit_out((1 >> i) & 1); }
+    for (int i = 4; i >= 0; --i) { bit_out((reg >> i) & 1); }
+    drive(mdio, true);
+    bit_in(); // TA: Z
+    const bool no_response = bit_in(); // TA: 0
+    int value = 0;
+    for (int i = 0; i < 16; ++i) { value = (value << 1) | bit_in(); }
+    bit_in();
+    drive(mdc, true);
+    return no_response ? -1 : value;
+  }
+}
+
+static constexpr board_desc_t desc_unitpoep4 = {
+  { static_cast<board_id_t>(lgfx::board_M5UnitPoEP4), "M5UnitPoEP4", 0 },
+  no_power(), no_reset(), no_shared_sd(), no_display_pins(), no_pins(),
+  no_internal_i2c(), no_options(), pins(unitpoep4_detail::gpio_pins),
+  };
+
+class unitpoep4_detector_t final : public board_detector_t
+{
+public:
+  unitpoep4_detector_t() : board_detector_t(members_) {}
+  bool signature(probe_ctx_t& ctx) const override
+  {
+    const detect_class_expected_t expected = {
+      wiring::unitpoep4::detect_class_mask, wiring::unitpoep4::detect_class_up,
+      wiring::unitpoep4::detect_class_down, wiring::unitpoep4::detect_class_floating,
+      wiring::unitpoep4::detect_class_fixed,
+    };
+    // Tab5 SCL G32 stays pulled up even with a unit attached to Port B G52;
+    // reject it before G31 can be driven as MDC on the shared internal bus.
+    return match_detect_class(expected, probe_pin_pulls(ctx, expected.mask));
+  }
+  bool confirm(probe_ctx_t& ctx, board_result_t* result) const override
+  {
+    if (result == nullptr || ctx.transaction == nullptr) { return false; }
+    const ops::gpio_scope_t scope = {
+      GPIO_NUM_MAX, desc_unitpoep4.op_gpio_pins.data, desc_unitpoep4.op_gpio_pins.size,
+    };
+    if (!ops::gpio_allowed(scope, unitpoep4_detail::mdc)
+     || !ops::gpio_allowed(scope, unitpoep4_detail::mdio)) { return false; }
+    const int id1 = unitpoep4_detail::read_phy_register(2);
+    const int id2 = unitpoep4_detail::read_phy_register(3);
+    // Even successful displayless detection must return both management pins.
+    ctx.transaction->restore_start(unitpoep4_detail::gpio_pins,
+                                   sizeof(unitpoep4_detail::gpio_pins));
+    if (id1 != 0x0243 || id2 != 0x0C54) { return false; }
+    result->assign(&desc_unitpoep4);
+    return true;
+  }
+private:
+  static const board_def_t* const members_[2];
+};
+const board_def_t* const unitpoep4_detector_t::members_[2] = { &desc_unitpoep4.def, nullptr };
+static const unitpoep4_detector_t unitpoep4_detector;
diff --git a/src/board_detect/m5/generated/detector_order_constraints.hpp b/src/board_detect/m5/generated/detector_order_constraints.hpp
index c946ff98..58ab1541 100644
--- a/src/board_detect/m5/generated/detector_order_constraints.hpp
+++ b/src/board_detect/m5/generated/detector_order_constraints.hpp
@@ -29,5 +29,8 @@ static constexpr detector_order_edge_t detector_order_edges[] = {
   { 18, 26 },
   { 153, 33 },
   { 154, 140 },
+  { 31, 22 },
+  { 22, 148 },
+  { 148, 150 },
 };
 } } // namespace m5gfx::board_detect
diff --git a/src/board_detect/m5/generated/esp32p4_detector_order.hpp b/src/board_detect/m5/generated/esp32p4_detector_order.hpp
index 5a01cb26..c3dc18f2 100644
--- a/src/board_detect/m5/generated/esp32p4_detector_order.hpp
+++ b/src/board_detect/m5/generated/esp32p4_detector_order.hpp
@@ -4,6 +4,8 @@
 static const board_detector_t* const esp32p4_detectors[] = {
   &corep4x_detector,
   &tab5_family_detector,
+  &unitpoep4_detector,
+  &stampp4_detector,
   nullptr,
 };
 
diff --git a/src/board_detect/m5/generated/esp32p4_wiring.hpp b/src/board_detect/m5/generated/esp32p4_wiring.hpp
index 2551fd69..ddde640a 100644
--- a/src/board_detect/m5/generated/esp32p4_wiring.hpp
+++ b/src/board_detect/m5/generated/esp32p4_wiring.hpp
@@ -13,7 +13,20 @@ namespace corep4x {
   constexpr std::int8_t internal_i2c_port = 1;
 } // namespace corep4x
 
+namespace unitpoep4 {
+  constexpr std::uint64_t detect_class_mask = 0x10000180000000ULL;
+  constexpr std::uint64_t detect_class_up = 0x10000080000000ULL;
+  constexpr std::uint64_t detect_class_down = 0x0ULL;
+  constexpr std::uint64_t detect_class_floating = 0x100000000ULL;
+  constexpr std::uint64_t detect_class_fixed = 0x0ULL;
+} // namespace unitpoep4
+
 namespace tab5 {
+  constexpr std::uint64_t detect_class_mask = 0x400000ULL;
+  constexpr std::uint64_t detect_class_up = 0x0ULL;
+  constexpr std::uint64_t detect_class_down = 0x400000ULL;
+  constexpr std::uint64_t detect_class_floating = 0x0ULL;
+  constexpr std::uint64_t detect_class_fixed = 0x0ULL;
   constexpr std::int8_t internal_i2c_sda = 31;
   constexpr std::int8_t internal_i2c_scl = 32;
   constexpr std::int8_t internal_i2c_port = 1;
@@ -21,6 +34,11 @@ namespace tab5 {
 } // namespace tab5
 
 namespace tab5x {
+  constexpr std::uint64_t detect_class_mask = 0x400000ULL;
+  constexpr std::uint64_t detect_class_up = 0x0ULL;
+  constexpr std::uint64_t detect_class_down = 0x400000ULL;
+  constexpr std::uint64_t detect_class_floating = 0x0ULL;
+  constexpr std::uint64_t detect_class_fixed = 0x0ULL;
   constexpr std::int8_t internal_i2c_sda = 31;
   constexpr std::int8_t internal_i2c_scl = 32;
   constexpr std::int8_t internal_i2c_port = 1;
@@ -28,7 +46,7 @@ namespace tab5x {
 } // namespace tab5x
 
 namespace detection {
-  constexpr std::int8_t unconditional_pins[] = { 9, 11, 23, 31, 32 };
+  constexpr std::int8_t unconditional_pins[] = { 9, 11, 22, 23, 31, 32, 52 };
 } // namespace detection
 
 } // namespace wiring
diff --git a/src/lgfx/boards.hpp b/src/lgfx/boards.hpp
index 2411ed8f..01ffe373 100644
--- a/src/lgfx/boards.hpp
+++ b/src/lgfx/boards.hpp
@@ -94,7 +94,8 @@ namespace lgfx // This should not be changed to "m5gfx"
     , board_M5UnitRCA = 198
     , board_M5ModuleDisplay = 199
     , board_M5ModuleRCA = 200
-    , board_M5UnitPoEP4HDMI = 201
+    , board_M5UnitPoEP4DisplayOut = 201
+    , board_M5UnitPoEP4HDMI __attribute__ ((deprecated)) = board_M5UnitPoEP4DisplayOut
 
     , board_FrameBuffer = 512
     };