M5Unit-PoE-P4-UserDemo

Overview

Unit PoE-P4 and Unit PoE-P4X

This is a web control interface project for M5Stack Unit PoE-P4 (SKU: U213) and Unit PoE-P4X, developed using the ESP-IDF framework. The project provides a web-based user interface that allows users to control various functions of the device through the network, including RGB LED, button counter, and GPIO pin control.

The system implements real-time bidirectional communication through WebSocket protocol, supporting LED color control, hardware button counting synchronization, aGPIO pin mode and level control functions.

IDF Build, Flash, Run

Unit PoE-P4X

Unit PoE-P4X uses the ESP32-P4 rev 3.x silicon family and requires ESP-IDF v6.1 or newer. The ESP-IDF target remains esp32p4; sdkconfig.p4x.defaults selects the rev 3.x family. ESP32-P4 revisions below 3.0 and revisions 3.0 or newer are mutually incompatible.

Build with an activated ESP-IDF 6.1 environment:

idf.py -B build.p4x -D SDKCONFIG=sdkconfig.p4x -D "SDKCONFIG_DEFAULTS=sdkconfig.defaults;sdkconfig.p4x.defaults" build

Flash and monitor the P4X build:

idf.py -B build.p4x -D SDKCONFIG=sdkconfig.p4x -p PORT flash monitor

The P4X profile uses the mDNS hostname poe-p4x.local and prints POE_P4X_DEMO_READY after the HTTP/WebSocket server starts.

Unit PoE-P4 (legacy)

The original Unit PoE-P4 build remains on ESP-IDF v5.4.2:

idf.py build
idf.py -p PORT flash monitor

Run

First, connect an Ethernet cable to the device’s Ethernet port, then connect the power supply. After the device is powered on, it will automatically connect to the Ethernet network. Now open the serial monitor; once the Ethernet connection is successful, the IP address information will be printed as follow.

I (511) app_webserver: Initializing SPIFFS
I (581) esp_eth.netif.netif_glue: 60:55:f9:fb:0a:3d
I (581) esp_eth.netif.netif_glue: ethernet attached to netif
I (2881) main: Ethernet Started
I (2881) app_webserver: Starting webserver...
I (2881) main: Ethernet Link Up
I (2881) main: Ethernet HW Addr 60:55:f9:fb:0a:3d
W (2881) httpd_uri: httpd_register_uri_handler: no slots left for registering handler
I (2891) main_task: Returned from app_main()
I (7411) esp_netif_handlers: eth ip: 192.168.20.198, mask: 255.255.255.0, gw: 192.168.20.1
I (7411) main: Ethernet Got IP Address
I (7411) main: ~~~~~~~~~~~
I (7411) main: ETHIP:192.168.20.198
I (7411) main: ETHMASK:255.255.255.0
I (7411) main: ETHGW:192.168.20.1
I (7421) main: ~~~~~~~~~~~
I (7421) mdns_mem: mDNS task will be created from internal RAM
I (7431) MDNS: mdns hostname set to: poe-p4

How to Access the Device Control Webpage

First, make sure that the computer or mobile phone you are using is on the same local area network (LAN) as the Ethernet connection. There are two methods:

1. Enter poe-p4.local for Unit PoE-P4 or poe-p4x.local for Unit PoE-P4X.
2. Copy the IP address printed in the serial monitor and paste it into the browser to open the webpage.

Related Link

• Document & Datasheet

Required Libraries:

• mdns

License

• M5Unit PoE-P4 - MIT