Unfortunately, Google Home, Google Nest, and Chromecast products are not sold or supported in Brazil. They are optimized to work best with specific Wi-Fi standards depending on where they are sold.
With that said, the first thing to try is to factory reset your speakers and factory reset your Chromecast and retry setup. If that doesn’t resolve the issue, there are some workarounds you can try:
- If your router is a dual band router and has different network names for the two Wifi bands, make sure you are connecting to the 2.4GHz band and not 5GHz.
- Login to the admin page of your router (refer to the manual or the back of the device).
- Navigate to Wifi or Wireless settings (the naming of the menu options you see will differ by router manufacturer and you may need to click to go into "advanced" settings to see some options).
- If your router is a dual band router and doesn't currently have different names for the two bands, look for an option to turn on different network names for the two bands.
- If "Wifi Protected Setup" or "WPS" is enabled, disable it.
- Set your Wifi channel/band (channel selection) to a value between 1 and 10.
Devices manufactured for certain countries cannot connect to Wifi channels above certain frequencies which is why I suggest changing your Wifi channel to between 1 and 10. Checking you are using the 2.4GHz band and not the 5GHz band is for dual band routers and is for the same reason. The two steps are interchangeable for some routers but not for others.
