HLK-RM04 UART to WiFi Ethernet Module with Antenna (Serial to WiFi Module)

The HLK-RM04 UART to WiFi Ethernet Module is a compact serial-to-network converter designed to connect UART-based devices to WiFi or Ethernet networks. It supports IEEE 802.11 b/g/n wireless communication and wired Ethernet, enabling seamless TCP/IP networking for embedded systems. With support for TCP Server, TCP Client, UDP, and transparent transmission modes, the module is ideal for IoT, industrial automation, remote monitoring, and smart device applications.

Key Features -

• UART to WiFi and Ethernet converter

• Supports IEEE 802.11 b/g/n wireless standard

• Built-in TCP/IP protocol stack

• Supports TCP Server, TCP Client and UDP modes

• Transparent serial data transmission

• Integrated web-based configuration interface

• External antenna for improved wireless range

• Supports AP, STA and AP+STA modes

• High-speed UART communication

• Suitable for IoT and industrial networking

Specifications -

• Product type - UART to WiFi Ethernet Module

• Model - HLK-RM04

• Wireless standard - IEEE 802.11 b/g/n

• Operating frequency - 2.4GHz ISM Band

• Interface - UART and Ethernet

• Supply voltage - 5V DC

• Serial baud rate - Up to 460800bps

• Security - WEP, WPA and WPA2

• Antenna type - External Antenna

• Working mode - AP, STA or AP+STA

Applications -

• IoT devices

• Industrial automation

• Remote monitoring systems

• Smart home devices

• Serial to WiFi networking

• Ethernet to WiFi conversion

• Data acquisition systems

• Embedded networking projects