IOException while requesting key: Invalid device key response

Question

I\'m using a Pi 3 with google IOT to operate some relays that control valves on an irrigation system. The system uses the internet to get a weather forecast to work how much

Answer 1

Simple. This means that the key on the Google Console that is associated with the IOT service is not matching the one stored locally on your Mac/Pi 3.

Just run: keytool -list -v -keystore <your keystore> -storepass <your store password> and copy the key under SHA1 or SHA256 to the Google Console.

You can create a keystore if none is present by keytool -genkeypair.

For other useful commands run keytool -h.