Get started for Matrix Voice

To get the code running I suggest you first reset the Voice if you have flashed it previously

Follow Step 1 and 2 (or all steps) from this guide https://matrix-io.github.io/matrix-documentation/matrix-voice/esp32/
Once your environment is set up go into the PlatformIO directory
Copy and configure the settings.ini.example to settings.ini and configure the proper parameters. Any $ in the settings.ini will be threated as an environment variable, did not find a way to escape it yet, fixes or workarounds are welcome
Set the device_type to 1 in the settings.ini
For the first flash, set the deployhost to the IP address of the attached pi and set method to 'matrix'
Build and flash the project with PlatformIO, for example run pio run --target upload from the commandline
After first flash you can use 'ota' as method under the OTA section in the settings.ini
If you change code and OTA does not work anymore for some reason, you can always start over by doing the "get started" part except for the first bullet

Known issues

As per this issue Romkabouter#94 the Matrix Voice only supports buster. Read that issue for a possible work-around