One such IoT devotee is [Sasa Karanovic], who writes in to tell us about his very impressive custom IoT LED dimmer based on the ESP8266 ... files for his PCB to the Arduino code he’s running ...
If you already have a ton of smart home devices and you're wondering what to do next, I recommend picking up an ESP8266.
Despite a wealth of tutorials for setting up and writing code for the ESP8266 WiFi module, there has not been much of anything on programming this cheap wireless module with the Arduino IDE.