Our 5 Sonoff switches are all connected and online to our router but the firmeware upgrade allways fails - what can be done?
I have 1.2.4 firmware and can't upgrade to 1.5.0.
Our attempt to firmware upgrade all - stops after 12 minutes with the comment "upgrade failure" - but in one single case the Sonoff actually succeded in just 30 seconds. I can not explain why the mainpart of the Sonoffs fails in the upgrade process. The manufactor maybe can step in with advise?
I am having the same problem, I can not update the firmware.
Sorry my english is very poor.
I connect 1 unit per update.
Delete a unit in EWelink program.
Push button about 5 second to reset.
And add unit in EWeLink again.
Click upgrade. if not work.
Trun off EWelink program again.
Trun off you router and Sonoff unit.
Trun on router. Trun on Sonoff unit.And go to EWelink to upgrade again.
I tried to register and delete few times, it will accept to update, but, it will not update it. This is for the S20 device.