Tutorials, build write-ups, and the occasional post-mortem where I explain — at length — exactly what went wrong.
Soil moisture, pump control, an ESP32, and a tiny PCB. The plant is fine. The project is overkill. The write-up is here.
A no-nonsense walkthrough. No design wizardry, no "easy" shortcuts that aren't. Just the workflow I actually use.
A particle sensor + RP2040 on the bench arm. It works. It also thinks toast is a hazardous material.
Footprints. Decoupling. Hubris. Pick any three. A short list, written from the smoking ruins of a prototype.
STM32 driving an RTL-SDR in a 3D-printed grip. Battery life is honest. Reception is suspicious.