The PoESP32 is a compact module from M5Stack that is equipped with a RJ45 port with PoE (Power-over-Ethernet) support. The device can be used in applications that involve HTTP, MQTT and similar communication protocols. 

The PoESP32 is offered with the following ESP32 SoC:

• ESP32-WROOM-32U — dual core (up to 240 MHz); 600 DMIPS, 520 KB SRAM, 4MB flash (without integrated 3D antenna, no Wi-Fi/BLE support)

       
PoESP32 top (left) and bottom view (right)
(click images to enlarge)

The product page also specifies that PoESP32 integrates a “built-in MAC and IP101G as physical layer transceiver.” 

The default firmware for this product is ESP-AT, additionally, M5Stack has provided some examples using TCP, HTTP and MQTT. As other ESP32 devices, the PoESP32 can be programmed using ESP-IDE and Arduino.

PoESP32 schematics(click image to enlarge)

It also seems that there will be support for UIFLOW in the future which is a platform similar to Scratch. 

PoESP32 features(click image to enlarge)

Specifications listed for the PoESP32 include: 

• Ethernet:
  • PoE IEEE 802.3 AF (Max 6W load)
  • RJ45 port 10/100Mbps
• Other Features:
  • UART 9600bps 8N1 AT command control
  • 1x HY2.0-4P interface
  • 3.3V Logic Level 
• Power:
  • 5V DC power supply (via HY2.0-4P)
  • 37-57V DC (PoE)
• Dimensions:
  • 72 x 26 x 19.5mm

 Further information

The M5Stack ESP32 Ethernet Unit with PoE is sold for $25.90 on the M5Stack online store, AliExpress and Mouser.com. The product seems to ship with a HY2.0-4P Cable and an instruction manual in addition to the PoE32 module.