Hi,

I just got a 3-pack Deco M9 Plus and set it up. Other than my phone that I used to configure it, I couldn't connect any other wireless clients. So I looked for a firmware upgrade (it came with 2019xxxx, and there was no way to upgrade using the app (said that FW was current) or the web (no web interface with that FW). Luckily, I found the update program in another thread, and it worked, so now I'm on 1.4.2 Build 20200725 Rel. 65637.  I hoped that would fix the issue (at least it allowed me to see status using a web browser, even though I can't really configure much).

Unfortunately, none of my other wireless devices would connect. I turned off 5GHz and that didn't make a difference. I turned on the guest network and had the same result. I changed the password on the guest network to something really simple, and eventually it worked, but I don't like having a simple password on it. 

Also, I haven't changed the password on the main wifi network, as I'm concerned that my phone will lose its connection and I won't be able to change anything (since the web interface hardly allows me to change anything at all). 

I've tried turning fast roaming off, as well as beamforming, and neither of those makes a difference. 

The only other thing I can think of is that I still have an old router still on the network, which allows the other devices to still get wireless access until I get my Deco working correctly, It is just functioning as an access point without DHCP enabled -- it was doing the same thing before adding the Deco (I replaced another router with the Deco). Seems that shouldn't have any effect on what I'm doing, though...

Any thoughts? Thanks in advance!

andy