Hello!
I'm working on a project where I'm using various sensors. I want to know what is the calibration procedure(not manual but code).
Temperature- ds18b20 probe
Humidity and pressure- AHT20+BMP280
Please help me with the calibration of the sensor values.
Thank you!
Get a lab quality ($$$) sensor and compare values. Use the map function to adjust.
These sensors are factory calibrated; so, they don't need secondary calibration in the field.
You'll find such information in the datasheets of the sensors you use. In the particular instances you mention, you'll find what @GolamMostafa is correct: these sensors are factory calibrated and don't offer user-run calibration routines. You can always apply a compensation to the readout of individual sensors in your code, based on a comparison against a standard (e.g. a calibrated, accurate reference sensor).
Standard references are brine with ice and boiling water. Altitude will enter into it if you want it spot on.
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