Exploring the PoE support of the M5Stack ESP32 module

A little module from M5Stack called the PoESP32 has an RJ45 connector that supports PoE (Power-over-Ethernet). Applications involving HTTP, MQTT, and related communication protocols can use the device. The ESP32-WROOM-32U modules are strong, generic Wi-Fi, Bluetooth, and Bluetooth LE MCUs that are designed to target a broad range of applications. These applications may be as simple as low-power sensor networks or as complex as speech encoding, music streaming, and MP3 decoding. It also has dual-core (up to 240 MHz), and 600 DMIPS and is available with the PoESP32. Additionally, it includes a 4MB flash and 520 KB SRAM (without an inbuilt 3D antenna or compatibility for Wi-Fi or BLE).

PoESP32 top view

PoESP32 bottom view

Additionally, the product page states that PoESP32 incorporates a “built-in MAC and IP101G as physical layer transceiver.” The product’s default firmware is ESP-AT, and M5Stack has also offered some examples using TCP, HTTP, and MQTT. The PoESP32 may be programmed using ESP-IDE and Arduino, just like other ESP32 gadgets. It can connect to a server using simple AT commands sent through the serial port. This lets it send data and control it from a distance. With its PoE power supply, this module makes wiring easier and saves money on labor. It also leaves room for future development to meet your needs.

PoESP32 schematics

It also looks like UIFLOW, which is a platform similar to Scratch, will be supported in the future.

PoESP32 features

PoESP32 has a lot of different features, such as Ethernet, that is PoE IEEE 802.3 AF (Max 6W load), and an RJ45 port that can handle 10/100Mbps. 3.3V Logic Level and UART 9600bps 8N1 AT command control are some of the other features. It is powered by a 5V DC power supply (via HY2.0-4P) and 37-57V DC (PoE). Its dimensions are 72 x 26 x 19.5mm. The communication is carried out using a UART 9600bps 8N1 AT command control interface.

According to additional information, the M5Stack ESP32 Ethernet Unit with PoE is available for $25.90 on Mouser.com, AliExpress, and the M5Stack website. In addition to the PoE32 module, the product appears to come with an HY2.0-4P Cable and an instruction booklet.

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