I tried Google Assistant on a Pi 3 using Buster and found that it does work in general, save some issues I am working through. Will test on a Pi 4 as well.
When you followed our guide, did you use Google Assistant Service or Google Assistant Library when going to “configure the developer project”?
Google Assistant Library is what our
google-matrixio-assistant-hotword example is based on but that library has now been deprecated by Google.
I tried it with the Google Assistant Service and will be creating another
google-matrixio-assistant-hotword example to work with it (the API is a bit different).
I tested the Google Assistant Service version of the setup by trying one of their sample programs as shown here. I did have to add
rate 16000 under the
hw line in
pcm.speaker in the
/etc/asound.conf file to get the sample program to run, in case you want to try this yourself before we update the guide.