LinkNode R8 is a WiFi relay controller and it is powered by ESP-12f ESP8266 WiFi module which is comptiable with Arduino programming. There are 8 relay channels and each channel allows you to control high-power devices (up to 10 A) via the on-board relay. LinkNode R8 can be used to remotely turn lights, fans and other devices on/off. The WiFi interface will allow you to associate the board with your existing WiFi network and send the commands over the network.
Features[edit]
ESP-12f ESP8266 WiFi module
8 Channel relays,supporting:
277V AC, 10A
125V AC, 12A
7-28V DC power
Two work modes:
Program via UART
Boot from flash
8 indiator LEDs