Another start for achieving something new ,
I want to connect ESP8266-12F , Arduino Mega 2560 Board And the PCF8574 I/O Expander (I can use MCP23017 also) together , Where ESP8266-12F will take commands using http (or probably other possible protocols) from user and will turn on the relayes connected to Arduino Output Pins or PCF8574 pins. I have done basic practical tests on esp8266-12f (like Turning Lights On/Off ) but i want to expand it for more functionalities. Also don't want to control the esp8266 using AT commands.
Power source i can manage to build.
Please Guide me so that i can complete this long run.
P.S. - I am not from electronics background, so need long runway than usual to take off.