PR: https://github.com/mendersoftware/meta-mender/pull/504

I used to do this way back when I worked with the RPi port. Have my own meta-mender-demo layer that setups up WiFi on Raspberrypi. Have not used it in a while but could be a source of inspiration maybe.

https://github.com/mirzak/meta-mender-demo

There are quite a few ways to enable wifi depending on what components you have.  I captured some notes at one point trying to enumerate the popular possibilities and I'd like to some day turn that into a blog post.

For our default setup, we use systemd and systemd-networkd.  To enable wifi on the RpI you need a few things.  In local.conf:

Additionally you need to add a custom wpa-supplicant.conf file.  To generate this file you need to run the following on any Linux system:

I keep my file in the /work/dmoseley/local directory which is not under any kind of source control to avoid any risk of my psk getting published on github.  I then use the following recipe to include it in my build: https://github.com/drewmoseley/meta-dmoseley-local-config/blob/master/recipes-connectivity/wpa-supplicant/wpa-supplicant_%25.bbappend

That specific recipe has more options than are needed for Mender because I was testing alternatives to systemd-networkd but basically you need to arrange for the output of the above wpa_passphrase invocation to be stored on the target rootfs as /etc/wpa_supplicant/wpa_supplicant-nl80211-wlan0.conf and setup the systemd script to launch at boot.  The relevant snippet from my do_install_append() is:

you mentioned you had some starting points / docs for this?