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Sonoff Dual only usable with app?

My 3 sonoff dual arrived last week.


I tried one out last weekend and can now control it wiht the APP provided.


I miss the features to control:

- via REST

- via MQTT


Is this device only usable with the APP or do I miss something?


Writing my own firmware seems to be difficult to, as the IO is routed through a seperate MCU and the protocol doesn't seem to be open.


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