If you're not using them, you should be.
These are some great DIY projects that you can do for cheap.
aInstitute of Global Health Innovation (IGHI), Department of Surgery and Cancer, Imperial College London, St Mary’s Campus, Norfolk Place, London W2 1PG, UK bDepartment of Primary Care and Public ...
Learn how to repurpose your spare ESP32 boards into cost-effective presence detection sensors using the Tommy Sense ...