Couldn't get my Aria 2 to connect to either my main network or the guest network on my Google Fiber wifi points. I turned off the second wifi point so only the router point at the fiber junction was transmitting. Didn't seem to make a difference. Had an earlier version iPhone running iOS 13 and allowed me to download an earlier compatible version of the Fitbit app. When I set up the Aria 2 with an iphone running iOS 12 with the older Fitbit app, the scale connected.
Answered! Go to the Recommended Answer.
It probably worked because the older iPhone did not support 5ghz Wi-Fi either, making it so that it was connected to 2.4ghz during the setup of the Fitbit Aria 2. Would be my guess.
But it works now? This was just for sharing your story/ workaround? 🙂
And this was for Google Fiber, not Nest Wifi ( https://support.google.com/googlenest/answer/6280668?hl=en )?