Exploring HLK-RM04 Serial-to-WiFi Module
HLK-RM04 is a low-cost UART-ETH-WIFI module developed by Shenzhen Hi-Link Electronic co., Ltd with built-in TCP / IP protocol stack. In this article, Ray shares his first experience experimenting with this module and explores its Serial-to-WiFi capability using Arduino.
HLK-RM04 Serial-to-WiFi Module