Going to plug my own side project from the past here: https://cattlepi.com/ https://cattlepi.com/ https://github.com/cattlepi/cattlepi/blob/main/README.md https

Going to plug my own side project from the past here: https://cattlepi.com/ https://cattlepi.com/ https://github.com/cattlepi/cattlepi/blob/main/README.md https://github.com/cattlepi/cattlepi/blob/main/README.md Been running pis (mostly 3b+) for eons with this solution and at this point i can say it's bulletproof. The key is to minimize the sdcard wear and tear (it uses an overlay filesystem with squashfs as base and tmpfs as write top layer) and to keep zero stare on the device. You can build the image starting from normal raspbian. You can also update it over the network. As far as usage in the wild the largest "deployment" (i know about) is at around 1000 pis.