Thanks for this pointer. For a long time I thought there should be a good open-source project that allows some usage of old phones that fall out of daily usage

Thanks for this pointer. For a long time I thought there should be a good open-source project that allows some usage of old phones that fall out of daily usage but still have most of the features working -- except for may be battery life or a chipped screen. For example I have a bunch of tablets and mobile phones that are in this state. Ideally I would like to be able to mount them to a wall and convert them into simple displays that I can "cast" a screen or video to (other use cases -- simple weather displays, security camera monitors, remote switches for smart devices, etc). I know some of these use cases are possible but last time I played with them it was a little more effort than I had time for. Was hoping to see more general purpose plug-and-play solutions emerge.