I’m finally back to this project! I took a looooong break but now it’s done! Now the board has actual code.
At first, I used homeassistant as a middleman in order to send commands to the speaker, but a) it wasn’t working very reliably, and b) not very many people have a homeassistant server running, so they wouldn’t be able to run this project. After that, I changed it to just use the Spotify API. There was one problem though: The spotify API by itself can’t wake up an Alexa speaker from sleep. In order to get around this, I used the voicemonkey API as a way of triggering actions directly on the Alexa to start the playback. After that, all the logic is handled by direct Spotify API calls.