Raspberry Pi 5

[ebaauw]

The Raspberry Pi 5 uses the BCM2712 SoC package and the RP1 southbridge to control the GPIO pins. This hardware setup is very different from the Pi 4B (and from other Pi models). Unfortunately it is not yet (?) supported by pigpio, see joan2937/pigpio#589.

Consequently, currently Homebridge RPi cannot manage a Pi 5 remotely and cannot control the GPIO pins for a local Pi5.

[JinShil]

Consider using rgpio: https://abyz.me.uk/lg/rgpiod.html

[ebaauw]

Does that support the Pi 5?

Does it come pre-installed with Raspberry Pi OS, or can it be installed through apt? I don't want a dependency on some programme that users need to compile themselves.

[JinShil]

It does not yet appear to be in either the Debian repository or the Raspberry Pi repository, so I think users will need to build it and install it themselves using make. There is a discussion on the Raspberry Pi Bookworm Beta forums about replacing pigpio with rgpio, but it doesn't appear to have happened yet, and can't say whether or not it will.

[jumuro-dev]

rgpiod is now installed via apt install rgpiod.
I would like to understand when the plugin is updated to support this.

[ebaauw]

rgpiod is now installed via apt install rgpiod.

Not on my systems running bullseye:

$ sudo apt install rgpiod
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
E: Unable to locate package rgpiod

Did you configure an additional source for apt?

[jumuro-dev]

grep -rhE "^deb |^deb-src " /etc/apt/sources.list /etc/apt/sources.list.d/

deb http://deb.debian.org/debian bookworm main contrib non-free non-free-firmware
deb http://deb.debian.org/debian-security/ bookworm-security main contrib non-free non-free-firmware
deb http://deb.debian.org/debian bookworm-updates main contrib non-free non-free-firmware
deb [signed-by=/usr/share/keyrings/homebridge.gpg] https://repo.homebridge.io stable main
deb http://archive.raspberrypi.com/debian/ bookworm main
deb [signed-by=/etc/apt/keyrings/ookla_speedtest-cli-archive-keyring.gpg] https://packagecloud.io/ookla/speedtest-cli/debian/ bookworm main
deb-src [signed-by=/etc/apt/keyrings/ookla_speedtest-cli-archive-keyring.gpg] https://packagecloud.io/ookla/speedtest-cli/debian/ bookworm main

[jumuro-dev]

Is there a chance that the GPIO issue for RP5 will be resolved in the near future?
Is it worth hoping for?

[ebaauw]

I’m doing my home automation as a hobby, next to my day-time job. I don’t keep a planning for it. I prioritise features that I need myself, and features that spark my interest. I’m still running production on the Raspberry Pi 4, so I don’t have an urgent need for GPIO support on the Raspberry Pi 5. Intellectually, supporting rgpio is just doing the same in a slightly different way; kinda boring.

I would prefer to migrate Homebridge RPi from using pigpio to using lg (rgpiod), but that requires lg to be available on older Raspberry Pi models and OSes. Instructing people to download, compile, and install lg themselves will result in more requests for support than I’ll be able to handle.

The alternative is to support both lg and pigpio in parallel, using some mechanism to indicate which one to use for which host (probably the daemon’s port number). While providing similar features, the interfaces provided by each are very different, effectively doubling my effort to develop and maintain these.

Even on bookworm, lg support seems only partial. While rgpiod can be installed using apt, rgs cannot. Lacking that, I would need to enhance the rpi command-line tool to support troubleshooting the connection to rgpiod. More boring work.