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Raspberry Pi 2023-11-25T09:14:35+01:00 false false false true true true

Raspberry Pi 4

4GB version, if that information is of any use.

No network after boot

Sometimes I make mistakes in my initial wpa_supplicant.conf file (that I'd place on the boot partition of the new Raspberry Pi SDcard). Recently my wpa_supplicant.conf file was totally messed up (a bracket too much I think).

So there is a quick way to connect to a WiFi network with the use of nmcli (NetworkManager).

$ sudo nmcli device wifi connect [ssid] password [password]

You can view networks with (no need for sudo):

$ nmcli device wifi list

Moving to testing (from bookworm)

Why would you want to do that in the first place? Well, most packages on debian stable are quite old -- hence the name stable.

If you need newer packages, you should consider moving to the testing branch. I moved my Raspberry Pi 4 to testing because of the starship prompt that I use on my computers -- it needed a newer version of the rustc package.

First of all, upgrade to the latest packages.

$ sudo apt update && sudo apt upgrade

Now change the release name (e.g. bookworm) to testing in /etc/apt/sources.list:

deb http://deb.debian.org/debian testing main contrib non-free non-free-firmware
deb http://deb.debian.org/debian-security/ testing-security main contrib non-free non-free-firmware
deb http://deb.debian.org/debian testing-updates main contrib non-free non-free-firmware

Then update step by step.

$ sudo apt update
$ sudo apt upgrade

Restart services during package upgrades without asking?

Answer with Yes.

Finish the update:

$ sudo apt full-upgrade
$ sudo reboot

Python 3

Installing non-packaged modules

I could not find aprslib as a package, so I had to install this myself. Debian did not allow the installation as it did before, so I had to create a virtual environment. And it went like this:

$ python -m venv ~/.env
$ source ~/.env/bin/activate
$ pip install aprslib
$ deactivate

I now have a similar line in my crontab:

3 * * * * /home/dominic/.env/bin/python /home/dominic/bin/aprs_sendstatus.py

We could also create virtual environments per application, module, package etc.

https://www.raspberrypi.com/documentation/computers/os.html#python-on-raspberry-pi

Raspberry Pi 3

Raspberry Pi 2

Raspberry Pi Pico W

Using MicroPython

https://micropython.org/download/RPI_PICO_W/

I did the dumb thing and made the boot.py file break which led to an endless loop showing me only the Error code and restarting...

I was able to stop the script by quickly pressing CTRL+D, CTRL+C on the serial console but never was able to update the broken file without it doing a soft-reboot which loads boot.py again instantly...

After some research I was glad I found pico-nuke.

Boot into uf2 loading (pressing BOOTSEL while power on) and place the correct .uf file (pico_nuke_pico_w-1.1.uf2) on the mounted device.

On OpenBSD there is no response but you can see the filesystem unmounted/removed. Unplug the USB and plug it in again booting into uf2 loading, copying over the MicroPython uf2 file again.