M5Stack has introduced the Unit PoE-P4, a compact PoE-powered Ethernet controller built around Espressif’s ESP32-P4 SoC. The module integrates 16MB Flash, 32MB PSRAM, a 10/100 Ethernet PHY, dual MIPI interfaces, and USB connectivity in a 64 × 24 mm form factor.

The board is based on the ESP32-P4NRW32, featuring a dual-core 32-bit RISC-V processor clocked at up to 360 MHz alongside a 40 MHz low-power RISC-V coprocessor.

An integrated IP101GRI PHY provides 10/100 Mbps Ethernet connectivity, while IEEE 802.3at PoE support enables both data and power delivery over a single Ethernet cable. The onboard power stage supports up to 6W output.

Unit PoE w/ ESP32-P4 pinout

For display and vision applications, the Unit PoE-P4 includes a 24-pin FPC MIPI DSI 2-lane interface supporting display resolutions up to 1920 × 1080 (depending on lane bandwidth and frame rate), along with a 24-pin FPC MIPI CSI 2-lane interface for camera input.

Web control panel

Peripheral connectivity includes one USB Type-C Host port for storage devices or HID peripherals, and a second USB Type-C port supporting OTG and firmware download. Additional expansion is provided through a Hat2-Bus 2.54 mm header, SDIO and ISP expansion headers, and a HY2.0-4P Grove-compatible connector.

Unit PoE w/ ESP32-P4

Firmware flashing is handled via USB Type-C download mode, and development is supported through both Arduino and ESP-IDF environments. M5Stack provides schematics and firmware source code through its online documentation.

Specifications listed for the Unit PoE-P4 include:

• Processor:
  • ESP32-P4NRW32 — dual-core 32-bit RISC-V @ 360 MHz
    Low-power 32-bit RISC-V coprocessor @ 40 MHz
• Memory:
  • 16MB Flash
  • 32MB PSRAM
• Networking:
  • IP101GRI Ethernet PHY
  • 10/100 Mbps adaptive Ethernet
  • RJ45 connector
  • IEEE 802.3at PoE support (up to 6W output)
• Display:
  • 24-pin FPC MIPI DSI 2-Lane (+ TP + BL)
• Camera:
  • 24-pin FPC MIPI CSI 2-Lane interface
• I/O Interfaces:
  • Hat2-Bus 2.54-16P header
  • SDIO-Bus 9P
  • ISP-Bus 6P
  • HY2.0-4P Grove connector
  • 1x RGB LED
  • 1x user button
  • 1x infrared transmitter
• USB:
  • 1x USB Type-C Host (USB 2.0)
    1x USB Type-C OTG (USB 2.0)
• Power:
  • DC 5V (via USB Type-C or PoE)
  • Operating current: 5V @ 73.82mA
  • Full load: ~277mA
  • Deep sleep: 5V @ 19.85mA
• Operating temperature:
  • 0°C to 40°C
• Mechanical:
  • 64.0 × 24.0 × 20.2 mm
  • 28.2 g

Further Information