ESP8266 WiFi Control Relay

This ESP8266 WiFi Module Project you can control 4 channel relay outputs via WiFi Network.

This project upgrade for this one.
http://androidcontrol.blogspot.com/2015/05/arduino-wifi-control-with-esp8266-module.html

System Diagram

Hardware
1.ESP8266 WiFi Module ( or NodeMCU )
2.4 Channel Relay Board. ( Active High )
3.OLED Display

Wiring Diagram

ESP8266 Pin GPIO_14 to Relay 1
ESP8266 Pin GPIO_12 to Relay 2
ESP8266 Pin GPIO_13 to Relay 3
ESP8266 Pin GPIO_15 to Relay 4

Option OLED Display

ESP8266 Pin GPIO_05 ( SCL ) to OLED pin SCL

ESP8266 Pin GPIO_04 ( SDA ) to OLED pin SDA

ESP8266 Source Code
IDE use Arduino IDE 1.6.8

Source Code on GitHub
https://github.com/amphancm/ESP8266WiFiControl

Android App on Google Play