title: Raspberry Pi Google Assistant: googlesamples-assistant-pushtotalk command saying no config found
body: <p>I'm making a google assistant with my Raspberry Pi 3 and I'm just trying make an LED turn on and off like in the docs (<a href="https://developers.google.com/assistant/sdk/guides/service/python/extend/handle-device-commands" rel="nofollow noreferrer">https://developers.google.com/assistant/sdk/guides/service/python/extend/handle-device-commands</a>) but when I run this command <code>googlesamples-assistant-pushtotalk</code> to test it, I get an error:</p>
  
  <pre><code>(env) pi@raspberrypi:~ $ googlesamples-assistant-pushtotalk
  INFO:root:Connecting to embeddedassistant.googleapis.com
  WARNING:root:Device config not found: [Errno 2] No such file or 
  directory: '/home/pi/.config/googlesamples- 
   assistant/device_config.json'
  INFO:root:Registering device
  ERROR:root:Option --device-model-id required when registering a device 
  instance.
  </code></pre>
  
  <p>I've tried troubleshooting but nothing seems to work. I'm completely lost here. Any help appreciated!</p>
  
  <p>Thanks!</p>