# Olimex ESP32-POE

> Open-source ESP32 development board with built-in Ethernet, Power-over-Ethernet support, micro-SD card slot, and LiPo battery connector. Ideal for wired Tasmota nodes and industrial IoT applications.

## Quick Facts

- **Brand:** Olimex
- **Board Type:** dev-board
- **Price:** ~$24.95
- **Product Readiness:** developer
- **CPU:** ESP32-WROOM-32
- **CPU Architecture:** Xtensa LX6
- **CPU Cores:** 2
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **USB:** USB-C
- **Power:** PoE 802.3af or USB-C 5V or LiPo
- **Operating Voltage:** 3.3V
- **Antenna:** Built-in PCB antenna
- **SD Card:** microSD

## Connectivity

- **Wifi:** 802.11 b/g/n
- **Bluetooth:** BLE 4.2
- **Ethernet:** 100Mbps (LAN8710A)

## Open Source

- **Firmware:** No
- **Schematics:** Yes
- **PCB Layout:** Yes

## Compatible Firmware

Tasmota, esphome, arduino, micropython

## Use Cases

- industrial-iot
- wired-smart-home
- poe-sensor-node
- data-logging
- ethernet-mqtt-bridge
- zigbee-gateway-host

## Components

- **ESP32-WROOM-32** (Microcontroller): Espressif ESP32-WROOM-32 module with dual-core Xtensa LX6 at 240MHz, 4MB flash, WiFi 802.11 b/g/n, and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-wroom-32_datasheet_en.pdf&ref=openhardware.directory&product=olimex-esp32-poe&source=md-export)
- **LAN8710A** (Ethernet PHY): Microchip LAN8710A 10/100 Ethernet PHY with RMII interface for wired network connectivity — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2F00002164B.pdf&ref=openhardware.directory&product=olimex-esp32-poe&source=md-export)

## Protocols

- **WiFi 802.11 b/g/n**
- **Bluetooth 4.2 + BLE**
- **Ethernet 100Mbps**
- **I2C**
- **SPI**
- **UART**
- **MQTT**

## Description

# Olimex ESP32-POE

The Olimex ESP32-POE is an open-source hardware development board combining the ESP32 with wired Ethernet connectivity and Power-over-Ethernet support. Designed for industrial and professional IoT applications where WiFi alone is insufficient.

## Key Features

- **ESP32-WROOM-32** dual-core at 240MHz with WiFi and Bluetooth
- **100Mbps Ethernet** via LAN8710A PHY with RJ45 connector
- **Power-over-Ethernet (PoE)** — 802.3af compliant, single-cable power + data
- **Micro-SD card slot** for data logging
- **LiPo battery connector** with charging circuit
- **USB-C** for programming
- **Open source hardware** — schematics and PCB layout freely available

## Tasmota Compatibility

- Flash via USB or serial
- Full Ethernet support in Tasmota with `tasmota32` binary
- Dual connectivity: WiFi + Ethernet simultaneously
- Ideal for wired Tasmota installations (more reliable than WiFi)
- MQTT over Ethernet for mission-critical automation

## Use Cases

- Wired smart home controller (no WiFi dependency)
- Industrial sensor node with PoE (single cable installation)
- Zigbee gateway host board (pair with Zigbee module via UART)
- Data logging station with SD card
- Ethernet-to-MQTT bridge
- PoE-powered environmental monitor

## Where to Buy

- [Buy for $24.95](https://openhardware.directory/r?to=https%3A%2F%2Fwww.olimex.com%2FProducts%2FIoT%2FESP32%2FESP32-POE%2Fopen-source-hardware&ref=openhardware.directory&product=olimex-esp32-poe&source=md-export)

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.olimex.com%2FProducts%2FIoT%2FESP32%2FESP32-POE%2Fopen-source-hardware&ref=openhardware.directory&product=olimex-esp32-poe&source=md-export)
- [wiki](https://openhardware.directory/r?to=https%3A%2F%2Ftemplates.blakadder.com%2Folimex_ESP32-POE.html&ref=openhardware.directory&product=olimex-esp32-poe&source=md-export)
- [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FOLIMEX%2FESP32-POE&ref=openhardware.directory&product=olimex-esp32-poe&source=md-export)
- [schematics](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2FOLIMEX%2FESP32-POE%2Ftree%2Fmaster%2FHARDWARE&ref=openhardware.directory&product=olimex-esp32-poe&source=md-export)

## Tags

`esp32`, `ethernet`, `poe`, `wifi`, `tasmota`, `esphome`, `open-source-hardware`, `development-board`, `industrial-iot`, `olimex`, `sd-card`

## Images

![Olimex ESP32-POE](https://nbg1.your-objectstorage.com/openhardware-directory/entities/olimex-esp32-poe/5229779dc09b.jpg)
![Olimex ESP32-POE](https://nbg1.your-objectstorage.com/openhardware-directory/entities/olimex-esp32-poe/211d4963dd99.jpg)
![Olimex ESP32-POE](https://nbg1.your-objectstorage.com/openhardware-directory/entities/olimex-esp32-poe/0e4cb3239c03.jpg)
![Olimex ESP32-POE](https://nbg1.your-objectstorage.com/openhardware-directory/entities/olimex-esp32-poe/f9babcb6ad8f.jpg)
![Olimex ESP32-POE](https://nbg1.your-objectstorage.com/openhardware-directory/entities/olimex-esp32-poe/9c22befac566.jpg)
![Olimex ESP32-POE](https://nbg1.your-objectstorage.com/openhardware-directory/entities/olimex-esp32-poe/39f7d112c34a.jpg)

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