For the very smallest scale of IoT device, most of them phone home to relay hubs, and the data gets passed to some other machine/bigger processor -- I think thi

For the very smallest scale of IoT device, most of them phone home to relay hubs, and the data gets passed to some other machine/bigger processor -- I think this article is more about running TimescaleDB on the bigger processor (or maybe even a relay?), not on the actual IoT device itself. Though TimescaleDB would improve the efficiency of RAM use I don't think you want to try and run a database on an IoT device with very limited RAM to begin with.