I’ve been playing around with the ESP8266 based Sonoff Wireless Smart Switch and I really wanted to upgrade the flash from the 1MB it comes with to 4MB so I can re-program it over wifi.

I’ve already have custom firmware running on it, but I don’t like …

I purchased some of these wireless smart switches from ITEAD, but didn’t like that you had to use their app and cloud server to use them. They use an ESP8266 microprocessor, so I wanted to see if I could re-program it to load my own firmware.

NOTE: Someone asked …

The ESP8266 ESP-12 module has a 2mm pitch, making it difficult to use on a breadboard with a 2.54mm pitch. Usually you are required to solder the module to a breakout board first.

This is just a quick ‘hack’ to connect the module to a breadboard for some testing …