RuntimeError: ws2811_init failed with code -3 (Hardware revision is not supported)

[jonhardman]

Hello,

I am struggling to resolve a 'Hardware revision is not supported' error message.
I have installed rpi_ws281x python on a raspberry PI compute module 4 (revision c03141).

The install seems to work successfully using the following command:

sudo pip install rpi_ws281x

However when it comes to running one of the standard examples I get the following error:

RuntimeError: ws2811_init failed with code -3 (Hardware revision is not supported)

Python version: 3.9.2
Python3 version: 3.9.2

Any help / tips will be greatly received :-)

Jon

[NeusAap]

What CM4 exactly? According to rpihw.c, these are the currently supported CM4´s:

// Compute Module 4
//
{
    .hwver = 0xa03140,
    .type = RPI_HWVER_TYPE_PI4,
    .periph_base = PERIPH_BASE_RPI4,
    .videocore_base = VIDEOCORE_BASE_RPI2,
    .desc = "Compute Module 4 v1.0 eMMC"
},
{
    .hwver = 0xb03140,
    .type = RPI_HWVER_TYPE_PI4,
    .periph_base = PERIPH_BASE_RPI4,
    .videocore_base = VIDEOCORE_BASE_RPI2,
    .desc = "Compute Module 4 v1.0 Lite"
},
{
    .hwver = 0xc03140,
    .type = RPI_HWVER_TYPE_PI4,
    .periph_base = PERIPH_BASE_RPI4,
    .videocore_base = VIDEOCORE_BASE_RPI2,
    .desc = "Compute Module 4 v1.0 WiFi"
},
{
    .hwver = 0xd03140,
    .type = RPI_HWVER_TYPE_PI4,
    .periph_base = PERIPH_BASE_RPI4,
    .videocore_base = VIDEOCORE_BASE_RPI2,
    .desc = "Compute Module 4 v1.0 WiFi 8GB"
},

I am currently using this with a no Wifi, 8gb emmc and 4gb ram version of the CM4

[marcuszerep]

See jgarff/rpi_ws281x#483 for more details.

Newer Raspberry Pis have different configuration values not added into that file. When you buy a new Raspberry Pi and it has this new configuration, it will throw this error.

[dleidert]

Any chance to get an updated version of the Python module? jgarff/rpi_ws281x just released a new version, including support for multiple models.

[Gadgetoid]

It's on my list. I did the rpi_ws281x release 😬

[centrek]

It's on my list. I did the rpi_ws281x release 😬

Hi all, is this update still on the pipeline? :)

[dleidert]

@Gadgetoid We would also really appreciate an update here because we are stuck with jgarff/rpi_ws281x#483 for some time now, and it starts blocking things.

[Gadgetoid]

Is this fixed with v5.0.0?

[Gadgetoid]

Note- this will not fix Pi 5.

See: jgarff/rpi_ws281x#528