Compatibility pairing process works but then the devices stay disconnected. I tried to set it to Wifi4 compatibility mode and turning off 5ghz but it didn't help. I have one new sonoff wall switch and one S20 that works. However two other S20, old wall switches and an old Basic don't connect.. Page 7: Production Introduction. Production Introduction Wire Fastener Cover Wi-Fi LED indicator (Blue) Pairing button BASICR3: On/off LED indicator (Red) Manual Switch BASICFR3: Remote-controlled LED indicator (Red) The device weight than 1 kg. The installation heigh of less than 2 m is recommended.

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Sonoff S-Mate2 Extreme - $7.49. The second device is a Sonoff S-Mate2 Extreme the latest iteration of the switch utilising Sonoff eWeLink Remote protocol using 433MHz radio to connect to compatible Sonoff devices wirelessly. If you are not sure what problem Sonoff S-Mate2 Extreme is trying to fix, let me explain.. Follow instructions how to enter DIY mode from Sonoff. This is the excerpt from it: Long press the button for 5 10 seconds to enter pairing mode, then press another 5 10 seconds to ender Compatible Pairing Mode (AP). The LED indicator should blink continuously. Next, Fill in WiFi SSID and password. Once successfully connected, the device is in.