They are attempting to build a os for smartphones based on Alpine linux with the stated goal of supporting a 10 year life cycle. They have a limited list of devices they support but I have heard good things about them.
For an old device project of the sort the OP is asking about, there must be an OS that supports the old device, otherwise the device become a members the dreaded IoT botnets.
They are attempting to build a os for smartphones based on Alpine linux with the stated goal of supporting a 10 year life cycle. They have a limited list of devices they support but I have heard good things about them.