U138 · M5Stack
Unit PoESP32 is an ESP32 Ethernet controller integrated with PoE (Power Over Ethernet) functionality. It adopts the ESP32 built-in MAC + IP101G physical layer transceiver solution. The module comes preloaded with ESP-AT firmware, supporting various protocol stack control commands such as TCP, MQTT, and HTTP. Through serial communication, simple AT commands can be used to achieve server connection, data communication, and remote control functions. With PoE power supply, it not only saves… (M5Stack U138)
| Part number | U138 |
|---|---|
| Manufacturer | M5Stack |
| Category | Communication & Wireless › Ethernet |
| Pins | 4 |
ESP32 Ethernet Unit with PoE pinout
| Pin | Name | Type | Description |
|---|---|---|---|
| 1 | SIG1 | bidirectional | PORT.B: GPIO/analog; PORT.C: UART - see the unit's pin map |
| 2 | SIG2 | bidirectional | PORT.B: GPIO/analog; PORT.C: UART - see the unit's pin map |
| 3 | 5V | power | |
| 4 | GND | ground |
Schematic symbol and footprint
Schematic symbol
Footprint: Grove HY2.0 4-pin through-hole, 2.0 mm pitch — to scale, pad 1 in yellow (mm). Check against the datasheet before ordering PCBs.
