Let’s say I have a dozen temperature sensors, and I calibrate them, so I know that one reads a fraction higher and another a fraction lower (than each other, or some arbitrary baseline).
I can create a template sensor for each real sensor that has an adjustment for the calibration. So, a dozen template sensors each with its own input temp sensor and its own hard-coded calibration adjustment.
What other approaches might work?
Use sensors compatible with esphome or zigbee2mqtt. They both let you calibrate without having to create template sensors
The compensation integration instead of the template integration
Zigbee sensors often have a calibration setting certainly in z2m.
The advantages to the compensation integration is it corrects over the entire range of readings, not just at 70F or whatever, and it will also adjust non-linear if you give it 3 or more points of data.
Ok, thanks everyone!
depends on the quality of the temperature sensor.
For example, I tried the same experiment with DHT11 and DHT12. An offset didn’t work so I tried an offset and slope. I built a temperature controlled oven and I was able to hold the temperature to +/- 0.1°C (according to my probe). To no avail.
My advice is to look at your OCD vs wallet ratio and proceed from there.
Let us know you fair.