rpi_ws281x: Solution for RuntimeError: "ws2811_init failed with code -3 (Hardware revision is not supported)" | For Raspberry Pi 4 Model B Rev 1.5 and later

Hello,

if u try to run a Script from the Repo and you get the RuntimeError: “ws2811_init failed with code -3 (Hardware revision is not supported)” I found a solution for u =D

First open your shell, type in: cat /proc/cpuinfo or go to the Explorer, into “home/proc/cpuinfo” and open the File. At the Bottom will be a Part which looks like:

Hardware	: BCM2711
Revision	: b03115
Serial		: 100000000ed9a28c
Model		: Raspberry Pi 4 Model B Rev 1.5

Now open the shell, type in nano (or vim) rpi-ws281x/library/lib/rpihw.c and search for your Model. If you cant find it, we will follow this Guide: https://github.com/rpi-ws281x/rpi-ws281x-python/issues/56#issuecomment-753320723

Open the shell, first you uninstall the repo with sudo pip3 uninstall rpi_ws281x,

next you clone the git with git clone --recurse-submodules https://github.com/rpi-ws281x/rpi-ws281x-python,

after that you run nano (or vim) rpi-ws281x-python/library/lib/rpihw.c,

then you add:

{ 
     .hwver = 0xb03115, (Based on the Revision found in cpuinfo)
     .type = RPI_HWVER_TYPE_PI4, 
     .periph_base = PERIPH_BASE_RPI4, 
     .videocore_base = VIDEOCORE_BASE_RPI2, 
     .desc = "Pi 4 Model B - 2GB v1.5" (Based on the Model in cpuinfo)
},

after you made the changes, you change the Directory with cd rpi-ws281x-python/library/,

the last Command will be: sudo python3 setup.py install

I hope that helped, have a nice Day or Night =D