ESP8266 WiFi Module and Android devices make Internet of Things Application to control devices ( Relay ) with Thingspeak.com.
Hardware 1.ESP8266 WiFi Module ( or NodeMCU ) 2.Two Channel Relay Board. ( Active High ) 3.OLED Display (Option )
Wiring Diagram ESP8266 Pin GPIO_13 to Relay 1 ESP8266 Pin GPIO_15 to Relay 2
OLED Display ESP8266 Pin GPIO_05 ( SCL ) to OLED pin SCL ESP8266 Pin GPIO_04 ( SDA ) to OLED pin SDA
Android App on Google Play
Web Blog http://androidcontrol.blogspot.com/2016/05/esp8266-iot-thingspeak-control-relay.html
Developer http://softpowergroup.net/ [email protected]