I can't figure out how to flash my MATRIX Voice

1

Happy holidays!

I have tried for a bunch of hours and I can’t figure out how to get my MATRIX Voice working to use as an ESP32 Rhasspy satellite. It seems the first thing I need to do is plug the device into a Pi so that it can be flashed - after that it looks like OTA updates will take care of it.

I do see the device in the output of aplay -l:

card 1: MATRIXIOSOUND [MATRIXIO-SOUND], device 1: matrixio.pcm-out.0 snd-soc-dummy-dai-1 []
  Subdevices: 1/1
  Subdevice #0: subdevice #0

But I have been unable to access the device (which is plugged into the Pi’s GPIO pins) in order to flash it.

When I try to deploy, this is what seems to eventually fail:

pi@raspberrypi:~/esp32-platformio $ esptool.py --chip esp32 --port /dev/ttyMATRIX0 --baud 115200 --before default_reset --after hard_reset erase_flash
esptool.py v3.3-dev
Serial port /dev/ttyMATRIX0
Connecting...
Failed to get PID of a device on /dev/ttyMATRIX0, using standard reset sequence.
...................................

A fatal error occurred: Failed to connect to ESP32: No serial data received.
For troubleshooting steps visit: https://github.com/espressif/esptool#troubleshooting

Does anyone know what I am doing wrong?

2

Yes, how did you do that?
Did you follow step 1 and 2 from this guide?
https://matrix-io.github.io/matrix-documentation/matrix-voice/esp32/

Where does this tty come from? Try the command which is in the guides: /dev/ttyS0

It seems to me you did not follow the guides or got lost somewhere.
Can you backtrace your steps on which guides you have used?

3

This seemed like the most logical tty in the list.

I don’t have a /dev/ttyS0:

pi@raspberrypi:~/matrixio_hal_esp32/examples/mic_energy $ ls /dev/ttyS0
ls: cannot access '/dev/ttyS0': No such file or directory

The first step I wasn’t able to do was the first step :slight_smile:

pi@raspberrypi:~/matrixio_hal_esp32/examples/mic_energy $ sudo apt-get update
Hit:2 http://raspbian.raspberrypi.org/raspbian bullseye InRelease
Hit:3 http://archive.raspberrypi.org/debian bullseye InRelease
Ign:1 https://s3.amazonaws.com/apt.matrix.one/raspbian bullseye InRelease
Err:4 https://s3.amazonaws.com/apt.matrix.one/raspbian bullseye Release
  404  Not Found [IP: 54.231.136.40 443]
Reading package lists... Done
E: The repository 'https://apt.matrix.one/raspbian bullseye Release' does not have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

This is after running the steps to add the repo. Do you have any ideas what might be wrong?

I tried to work around this by cloning the repo but it seems that didn’t handle all the dependencies.

Thanks again for your assistance.

4

Did you attach the Matrix Voice via the headers?
Reading the error message, it seems the package is not supported in the new RaspbianOS
I suggest staring again with a fresh install of an older version like:

5

Maybe try this?

6

I was able to get it to work (easily) after using the “legacy” Raspbian release - Buster seems to not be supported yet even if you have a supported kernel.

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