Description Unit PoESP32 is an ESP32 Ethernet controller integrated with PoE (Power over Ethernet) functionality. It adopts the ESP32 built-in MAC with the IP101G physical layer transceiver solution, providing a compact wired Ethernet control module for data communication and remote-control applications. The module comes preloaded with ESP-AT firmware and supports protocol stack control commands such as TCP, MQTT, and HTTP. Through serial communication, simple AT commands can be used to connect to servers, transmit data, and perform remote-control functions. With PoE power supply support, it helps reduce extra power wiring while still providing load capacity for connected devices. Features ESP32 main control core: integrates ESP32-WROOM-32U as the main controller. Ethernet PHY solution: uses the IP101G transceiver and supports IEEE 802.3/802.3u. PoE Ethernet interface: supports PoE IEEE 802.3 AF with up to 6W maximum load power. RJ45 wired network: supports 10/100Mbps Ethernet connection. Default ESP-AT firmware: supports TCP, MQTT, HTTP, and other protocol stack control commands. Secondary development support: reserves a program download interface for customized development. Flexible power supply: supports HY2.0-4P 5V power input and PoE power input. Development platforms: supports AT commands, Arduino, ESP-IDF, and UIFlow coming soon. Specifications Product Unit PoESP32 SKU U138 Main Controller ESP32-WROOM-32U CPU 240MHz dual core, 600 DMIPS SRAM 520KB Wireless Function No 3D antenna, no WiFi & BLE wireless Flash 4MB PHY IP101G, IEEE 802.3/802.3u MAC-PHY Interface RMII PoE Standard PoE IEEE 802.3 AF PoE Input Voltage DC 37-57V Maximum Power 6W Ethernet Interface RJ45 10/100Mbps Reserved Interfaces 1 x HY2.0-4P interface, 1 x program download interface Communication Interface UART 9600bps 8N1 AT command control Communication Logic Level 3.3V Product Size 72 x 26 x 19.2mm Product Weight 26.2g Package Size 75 x 36 x 20.5mm Gross Weight 32.8g Applications Ethernet controller. TCP client data passthrough. Product List 1 Unit PoESP32 1 HY2.0-4P Grove Cable (20cm) Other Content Default firmware: the module is preloaded with ESP-AT firmware for AT command control. Supported protocols: the official page lists TCP, MQTT, HTTP, and CoAP protocol stack support for development use. Secondary development: the official documentation notes that the casing can be removed to connect an ESP32 Downloader through the reserved program download interface. Power options: the module can be powered through the HY2.0-4P 5V interface or through PoE IEEE 802.3 AF. Resources Official Documents Unit PoESP32 Schematics PDF ESP32-WROOM-32U/D Datasheet IP101G Datasheet Internal Firmware / ESP-AT Unit PoESP32 Official Video FAQ What is Unit PoESP32 used for? It is used as an ESP32 Ethernet controller for wired data communication and TCP client data passthrough. Does Unit PoESP32 support PoE? Yes. It supports PoE IEEE 802.3 AF with a maximum power of 6W and DC 37-57V input. What Ethernet speed does it support? It supports RJ45 10/100Mbps Ethernet connection. What firmware is preloaded? The module comes preloaded with ESP-AT firmware. Which protocols are supported by the default firmware? The official page lists TCP, MQTT, HTTP, and other protocol stack control commands. What is the default serial communication setting? The communication interface is UART 9600bps 8N1 AT command control. Does this module support secondary development? Yes. It reserves a program download interface and supports secondary development with platforms such as Arduino and ESP-IDF.
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