So I've got my PandaPi 2.9 mostly running on a Raspberry Pi 3b and driving my homebuilt Delta printer, however for some reason I can't get it to probe. No matter what I try probing always results in printer error, and I'm starting to suspect a bug in Marlin 2.0.8. Unfortunately, selecting "update source" gives no option to update Marlin to a newer version, so I'm wondering when, if ever, this will become available.
I had this printer running on an Arduino Mega and Marlin 2.1.1 a few months ago, but upgraded motors required a higher-end controller board as well. Anyway, probing worked fine on Marlin 2.1.1.