I need this too, also a default fan speed setting for power on state
The sonoff B1_R2 haven't this status in the config
This is very much required.
Assume that you have turned the Fan ON and fall asleep and then the power goes off and returns back immediately but the Fan will not have the power to restart. You have to turn it ON manually and this is irritating. In fact, I have installed one iFan-02 and then uninstalled it due to this reason :(