compost.party: a repurposed smartphone running on solar power. It's a web server pieced together from scraps, humming in the attic of an apartment building.
I like this idea! There might be an increased danger of a battery explosion: it'll be near bright sunlight, away from where people will see it, with an old battery. I wonder if there are battery diagnostics that could provide an early warning?
I'm sure most of us have a fistful of old phones somewhere, the idea of using them for something is appealing.