Ethernet communication module with PoE port - ESP32 - Expansion Unit for M5Stack development modules

Unit extension in the form of an Ethernet communication module with PoE port (Power Over Ethernet) - designed for M5Stack development modules. It has a built-in ESP32-WROOM-32U dual-core microcontroller, does not support WiFi and Bluetooth wireless communication. It can connect to the server with simple AT commands through the UART serial port, realizing the functions of data transmission and remote control. Default firmware from ESP-AT supports TCP, MQTT and HTTP .

Kit contents with ESP32 Ethernet Unit with PoE.

The module has one Ethernet connector.

• Equipped with ESP32 controller
• IP101G transceiver model
• IEEE 802.3 / 802.3u standard
• PoE IEEE802.3 AF standard with support for a maximum load power of 6W
• RJ45 10/100 Mbps network port
• The default firmware is ESP-AT
• Support for TCP / MQTT / HTTP / CoAP and other protocols
• Connecting to the server with simple AT commands through the UART serial port

• ESP32 Ethernet Unit with PoE - Ethernet communication module with PoE port
• Connection cable 20 cm

• Microcontroller: ESP32-WROOM-32U / D
  • dual-core clocked at 240 MHz and 600 DMIPS
  • 520 KB of SRAM memory (without integrated 3D antenna)
  • does not support WiFi and Bluetooth wireless function
• Flash memory: 4 MB
• PHY: IP101G IEEE 802.3 / 802.3u
• MAC-PHY interface type: RMII
• PoE Standard: PoE IEEE802.3 AF
• Maximum power: 6W
• Ethernet standard: RJ45 10/100 Mbps
• Communication interface: UART command control 9600 bps 8N1 AT
• Logic power supply: 3.3V
• Module dimensions: 72 x 26 x 19.2 mm
• Weight: 26.2 g

Ethernet communication module with PoE port - ESP32 - Unit expansion module for M5Stack development modules.

The abbreviation MQTT comes from the words MQ Telemetry Transport. It specifies a simple data transmission protocol, which is currently considered the easiest and most frequently used method of data transfer to the cloud. Data published using the MQTT protocol is in text form, which means that you can convert the data structure to JSON (or any other text format) and then publish it without major problems. The MQTT protocol is dedicated to transmission for devices that do not require high bandwidth. By limiting the transmission speed, the protocol provides greater reliability.

• The website of the manufacturer: M5Stack U138
• User Guide