Home Automation using esp8266 (Nodemcu v3 4MB is used in this project):

Step1: Building a new switch board panel with integrated Relay module board

Cutting poly-carbonate sheet for switching and drilling holes for mounting relay board.

Relay Board mounted with screws

Step2: Wiring the 2-way switches with relays using stair-case wiring method

Nodemcu mounted with screws

Final front-view of the switch board panel.

Software

Arduino Sketch

sketch

Android App

App code: https://github.com/Dishendramishra/esp8266_homeautomation

App snapshot