About SensorRig
I build and run my own home data-acquisition hardware — and this site is where I write down what actually worked, what burned out, and what the datasheet failed to mention.
Everything published here is measured on equipment I own and operate continuously:
- DS18B20 1-Wire temperature probes on long cable runs
- DHT11 humidity sensors (and their well-earned reputation)
- ESP32-C3 remote nodes linked back over HC-12 433 MHz serial radio
- CT clamps + ADS1115 for whole-house energy monitoring
- A Raspberry Pi 5 collector running asyncio → SQLite (WAL) → FastAPI → Chart.js
- A legacy RRDtool system still running in parallel, because you don’t switch off a working monitor until the replacement has proven itself
No stock photos of server rooms. No copy-pasted vendor tutorials. If a wiring diagram appears here, it’s because I wired it.
Why the parallel-run obsession
Monitoring you can’t trust is worse than no monitoring. Every migration written up on this site runs old and new side by side until the numbers agree. That’s slower, and it’s the only honest way to do it.