2 way switch sonoff - How to?

@Jack_Kitley wrote:

Hi All

I was wanting to know if someone could help me with a problem i currently have that i need to solve.

Equipment:
Sonoff T1 2CH
Sonoff T1 1CH

I have the T1 1CH in the hallway and it has just a neutral and a live connected to keep it powered. I need this 1CH switch to turn on the light and the light is currently on the T1 2CH (2nd button/bottom).

I need it to act by turning on both buttons when the light is ON and when the light is off then both bottoms need to be OFF.

Im not sure if there is a easy tasmota setting with ButtonTopic? or do i have to do this with MQTT?
Which is best and how does one do it?

Thanks

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