Hi!, i'm struggling with my DHT22 sensor. If i do the calibration, the sensor is 5% humidity to high according from 2 other callibrated measuresment tools. Now i thought, maybe i can change the value from the sensor -5. Is there someone how did this or knows how to do this? This is my current situat…

You could use a change node as follows - [{"id":"5e31270904648203","type":"change","z":"624963ed82f87a01","name":"","rules":[{"t":"set","p":"payload.humidity","pt":"msg","to":"payload.humidity -5","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":1390,"y":280,"wires":[["…

Here is a link to an interesting article about these sensors: Test and Calibrate DHT22 / AM2302 / RHT03 hygrometers A detailed account of methodology and results for my accuracy test and calibration of six DHT22 (AM2302, RHT03) hygrometers. I assess the manufacturer's data sheet claim …

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How to change a number from payload

General

zenofmud 15 April 2022 22:47 3

Here is a link to an interesting article about these sensors:

Which may be helpful to understand these devices.

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How to change a number from payload

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