# WT32-ETH01

> ESP32 module with built-in Ethernet (LAN8720A PHY), WiFi, and Bluetooth. Designed for wired IoT applications, gateways, and industrial automation where reliable network connectivity is essential.

## Quick Facts

- **Brand:** Wireless-Tag
- **Board Type:** dev-board
- **Price:** ~$15
- **Product Readiness:** developer
- **CPU:** ESP32
- **CPU Architecture:** Xtensa LX6
- **CPU Cores:** 2
- **RAM:** 520KB SRAM
- **Flash:** 4MB
- **Power:** 5V via pin header
- **Operating Voltage:** 3.3V

## Connectivity

- **Wifi:** 802.11 b/g/n
- **Bluetooth:** BLE 4.2
- **Ethernet:** 10/100 Mbps

## Open Source

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

## Compatible Firmware

arduino, esp-idf, micropython, esphome, tasmota

## Use Cases

- iot-gateway
- industrial-iot
- home-automation
- ethernet-bridge
- esphome-node

## Components

- **ESP32** (mcu): Dual-core Xtensa LX6 microcontroller at 240 MHz with WiFi and Bluetooth 4.2 — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32_datasheet_en.pdf&ref=openhardware.directory&product=wt32-eth01&source=md-export)
- **LAN8720A** (network): Microchip LAN8720A 10/100 Base-T Ethernet PHY transceiver with RMII interface — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FLAN8720A.pdf&ref=openhardware.directory&product=wt32-eth01&source=md-export)
- **RJ45 Connector** (connector): RJ45 Ethernet connector for wired network connectivity — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fww1.microchip.com%2Fdownloads%2Fen%2FDeviceDoc%2FLAN8720A.pdf&ref=openhardware.directory&product=wt32-eth01&source=md-export)

## Protocols

- **UART**
- **I2C**
- **SPI**
- **RMII**

## Description

## Overview

The WT32-ETH01 by Wireless-Tag is an ESP32-based module with integrated Ethernet connectivity via a LAN8720A PHY. It bridges the gap between WiFi-only ESP32 boards and the need for reliable wired networking in IoT deployments, making it a popular choice for gateways, industrial controllers, and home automation nodes.

## Key Features

- **Built-in Ethernet** — LAN8720A 10/100 Mbps PHY for rock-solid wired connectivity
- **ESP32 dual-core** — 240 MHz Xtensa LX6 processor with WiFi 802.11 b/g/n and Bluetooth 4.2
- **Dual networking** — simultaneous Ethernet + WiFi operation for bridging or failover scenarios
- **4MB flash + 520KB SRAM** — sufficient for most IoT firmware
- **Compact module** — small form factor suitable for embedded integration
- **Wide voltage input** — 3.3V to 5V power supply support

## Specifications

| Spec | Value |
|------|-------|
| MCU | ESP32 (Xtensa dual-core LX6, 240 MHz) |
| Flash | 4 MB |
| SRAM | 520 KB |
| Ethernet | LAN8720A 10/100 Mbps |
| WiFi | 802.11 b/g/n |
| Bluetooth | 4.2 (BLE + Classic) |
| GPIO | 12 available (others used by Ethernet PHY) |
| Operating Voltage | 3.3V |
| Power | 5V via pin header |

## Common Applications

- **IoT gateways** — bridge WiFi/BLE sensors to a wired Ethernet backbone
- **Industrial IoT** — reliable wired connectivity for factory automation and monitoring
- **Home automation** — ESPHome or Tasmota node with stable wired connection
- **Ethernet-WiFi bridge** — extend WiFi networks or create access points with wired uplink
- **Data logging** — collect sensor data and push to servers over reliable Ethernet

## Getting Started

The WT32-ETH01 requires an external USB-to-serial adapter for programming (no onboard USB). It is well-supported by ESPHome (with built-in Ethernet component), Arduino IDE, ESP-IDF, and Tasmota. When using ESPHome, select the `wt32-eth01` board type for automatic pin configuration.

## Notes

- No onboard USB — use an FTDI or CH340 adapter for flashing (TX0, RX0, IO0 for boot mode)
- The Ethernet PHY uses several GPIOs (GPIO16, GPIO17, GPIO18, GPIO19, GPIO21, GPIO22, GPIO23) — avoid conflicts when assigning pins
- Some versions ship with or without pin headers — check the variant when ordering
- Power via 5V pin or 3.3V — onboard regulator handles conversion

## Where to Buy

- [OpenELab](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwt32-eth01-esp32&ref=openhardware.directory&product=wt32-eth01&source=md-export) — $15.00

## Resources

- [product](https://openhardware.directory/r?to=https%3A%2F%2Fopenelab.io%2Fproducts%2Fwt32-eth01-esp32&ref=openhardware.directory&product=wt32-eth01&source=md-export)

## Tags

`esp32`, `ethernet`, `lan8720a`, `wireless-tag`, `iot`, `gateway`, `industrial`

## Images

![WT32-ETH01](https://nbg1.your-objectstorage.com/openhardware-directory/entities/wt32-eth01/f003773c20da.jpg)

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