New member needs help please

Hi all thanks for having me,

ive got a simple project in mind all I want to do is turn on my heating while im on my way home from work.
Ive got a Honeywell wall thermostat with an on off button on it, what I was thinking was to use a sonoff lv with 0 voltage mod on the relay to turn it on and off but it needs to be a single pulse to turn on and then another to turn of anyone got any ideas how to do this.


Many thanks for any help


Daywalker