I have two Sonoff T1 3CH switches running Tasmota 12.4 which both exhibit the same problem.
- This works. Connect the Sonoff to my laptop via FTDI. Sonoff connects to my
- This does not work. In the same physical location, connect the Sonoff to my mains supply in its wall box. Does not connect to WiFi, Blue light blinks slowly.
- This works. With my mobile phone in the same location as my WiFi router, disable the router and open a mobile Hotspot with the same
- I have multiple Sonoff Basics and T1 1CH and 2CH and they all work correctly.
I'm struggling for a diagnosis that fits the symptoms. The best I can come up with is that the WiFi signal is marginal on the two 3CH devices, but I'm clutching at straws. Any ideas?