Deco M9 - new Echo Dot 4 will not connect to WiFi
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I've just purchased a new Amazon Echo Dot 4 to add to my existing smart home (I already have Echo 8, Dot Ver 1, 2 & 3 that all work perfectly). However during setup the new Dot 4 refuses to connect to my Deco M9 mesh system. I have tried all the various options in the deco app:
1. Just using 2.4ghz, then trying just 5ghz
2. Disabling fast roaming and beamforming, individually off and both off
3. Changing wifi security to all options including disableing security
4. Using guest wifi network
5. Using WPS option on all nodes
Despite trying all the variations above that I can think off, the Dot still refuses to connect. In desparation I contacted Amazon and they thought the new Dot 4 may be defective and sent me a replacement, which I really thought would resolve the problem. Alas not, the new (2nd Dot 4), also refuses to connect to the Deco M9 mesh!
Thus apart from returning the 2nd Dot 4 I'm all out of options that I can see to try resolve the problem.
At this point I'm thinking its either an incompatability issue with the Deco M9 (with Dot 4) or a problem at Amazons end with the Dot 4 firmware - being that all my other generation Dots & Echo 8s work perfectly!
I've also followed the 2nd pin post about one device not connecting, none of the solutions work.
I'm open to any further suggestions and interested to know if anyone else has the same problem?
!