I believe you will need to power them on and connect to the Internet
through Wi-Fi as well. They should update on their own once connected
assuming audio devices connect similarly to how the Chromecast does. If
you factory reset them when you took th...
Initially before the factory reset it indicated the firmware was out of
date. Only way to view and update that is using Home app and that wont
connect. Based on other complaints here, Google did something that broke
this.
