Let's Control It

I on my way to retirement.
I am excited from Arduino and ESP8266
I have started to implement Sonoff on my boiler to control heating, that the way conducted me to this forum.
Especially I look for an answer if I can use 2 cellphone to control the SonOff -which actually comprise of ESP

Welcome.

Using mqtt and the app "mqtt dash" you can control pretty much anything using your phone.

Welcome!

You can also install a Domotics platform like openHAB and control/supervise everything