ESP32-ETH UART to Ethernet WiFi BLE Module | RJ45 2.4GHz

ESP32-ETH UART to Ethernet WiFi & BLE Module

Take your embedded projects to the next level with the ESP32-ETH UART to Ethernet WiFi BLE Module. Powered by the versatile ESP32 chip, this compact module bridges serial UART devices to wired Ethernet and wireless 2.4GHz networks simultaneously — making it a go-to solution for IoT gateways, industrial automation, smart-home controllers, and DIY electronics projects. With a robust RJ45 10/100Mbps Ethernet port, onboard 32Mbit Flash, and support for both 3.3V and 5V power, it integrates seamlessly into virtually any project.

Made in Mainland China.

Key Features

• Powerful ESP32 Core: Main control chip ESP32 delivers reliable dual-mode wireless and wired connectivity in a single, compact footprint.
• 2.4GHz WiFi: 802.11 b/g/n support with speeds up to 150Mbps; compatible with Station, SoftAP, and Mixed operating modes for maximum deployment flexibility.
• Bluetooth 4.2: Supports both classic Bluetooth (BR/EDR) and Bluetooth Low Energy (BLE) for versatile short-range wireless connectivity.
• Wired Ethernet via RJ45: 10/100Mbps adaptive port with automatic MDI/MDIX — no need to worry about straight vs. crossover cables.
• Transparent UART Transmission: Seamlessly pass serial data between UART devices and Ethernet/WiFi networks with zero protocol conversion overhead.
• Generous Onboard Storage: 32Mbit (4MB) SPI Flash plus built-in 520KB SRAM for firmware, configuration, and runtime data.
• Flexible Power Input: Accepts 3.3V or 5V supply (recommended ≥500mA output current) — compatible with most microcontroller and development board ecosystems.
• Wide Operating Temperature: Rated -40°C to +85°C for demanding industrial and outdoor environments.
• Low Average Current Draw: ~80mA typical working current keeps thermal loads and power budgets in check.

Technical Specifications

What's in the Box?

• 1× ESP32-ETH UART to Ethernet WiFi BLE Transparent Transmission Module

Notes

• Colors may appear slightly different from product images due to monitor settings and lighting conditions.
• Please allow ±1mm–1cm tolerances due to manual measurement.

For more information on IoT standards and wireless communication protocols, visit the NIST Communications Technology Laboratory — Wireless Networks.

Frequently Asked Questions

Q: What is UART transparent transmission and how does this ESP32 module use it?

A: UART transparent transmission means the module forwards serial data from a connected UART device directly over Ethernet or WiFi without any protocol conversion or additional coding on your part. Simply configure the network parameters, connect your UART device, and data flows transparently between serial and network interfaces — ideal for retrofitting legacy serial equipment into modern IoT networks.

Q: Can I power the ESP32-ETH module with a 5V USB supply?

A: Yes. The module supports both 3.3V and 5V power inputs, making it compatible with standard USB power supplies and most microcontroller development boards. Ensure your power source can deliver at least 500mA to maintain stable operation, especially when both WiFi and Ethernet interfaces are active simultaneously.

Q: Does the module support both WiFi and Ethernet at the same time?

A: Yes. The ESP32-ETH module is designed to operate WiFi (in Station, SoftAP, or Mixed mode) and the RJ45 Ethernet interface concurrently, making it perfect for bridge, gateway, and dual-homed network applications.

Q: What baud rates does the UART interface support?

A: The UART interface supports a wide baud rate range from 80 bps up to 5,000,000 bps, providing compatibility with virtually any serial device — from low-speed sensors to high-throughput data acquisition systems.