I managed to get it to work for me on that board. I had Key to Grd and others 3.3v Gnd TX RX also wired. when I plugged in the usb to my laptop I also help down the button. and it just work. It did take more than one attempt but I was holding rather than soldering the connections
Alles anzeigenHi,
I have a Sonoff RF R2 Power V1.3 (2019.08.16)
The variant with GND on KEY does not seem to work (my flash tool cannot establish a connection).
Apparently nothing happens on the Sonoff when the key is pulled to ground ?!
Does anyone have another idea?
The structure of the 1.3 PCB looks quite similar to the 1.4 PCB shown here. However, the 8-pin chip above the LED is missing.