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DW2-WiFi units won't pair, tried everything. Is this a common problem?

What would prevent new DW2s from pairing?

I have tried multiple different 2.4gig access point brands (Unifi, Netgear), different networks, IOS eWelink and Android eWelink.  Also, the SSID all of my other Sonoff devices are using (FCCsec) is not listed on the pairing screen. The Bluetooth device ID appears, but fails to pair after wifi SSID and password are entered. Pairing failed.  Manually entering my preferred access point also fails.

Does anyone have any suggestions before I return these?

iTead is on holiday until 9-Oct.

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SSID name and password can also cause issue.

I also had issues to pair, but later I found out the causes:

  • wifi 2.4ghz must configure to Legacy ( b/g Protection )
  • wifi SSID must contain only a-z (no space)
  • wifi password must contain number 0-9
  • wifi channel must set to 6
  • eWeLink app must have location service permission.

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