Raspberry Pi 4 - Neopixel LED Initialization Errors

[heather-fillerup-miller]

When trying to run the led-test and speech_to_text recipe, the following error occurs:

error initializing - 3 Hardware revision is not supported
Verbose: shining my LED to RGB color 0xFF0000
Segmentation fault

Found a temporary solution here: beyondscreen/node-rpi-ws281x-native#130

[heather-fillerup-miller]

Turns out we have addressed this issue, we have a comment about it in the TROUBLESHOOTING.md file under "LED doesn't work on Raspberry Pi 4".

I will test that solution to ensure it still works and if so update the documentation so that it also mentions the "error initializing - 3 Hardware revision is not supported" and will be easier to find.

[jweisz]

• Need to test the LED solution that's in TROUBLESHOOTING to make sure it still works.
• Need to re-word TROUBLESHOOTING
• Possibly explore whether we should use a different library for driving the LED instead of rpi-ws281x
• Is there a way to detect if we're on a RPi4 when we do an npm install on a recipe to use the right rpi-ws281x branch?

[jweisz]

@heather-fillerup-miller will double-check the status of the library to see if the PR was accepted that fixes RPi4 support for LEDs

[heather-fillerup-miller]

Does not look like the PR has been accepted yet: beyondscreen/node-rpi-ws281x-native#134

I also added the error message and additional fix to the Wiki.

I think we can close this issue now.