Okay i´ll ask on the openhab forum.
But in the notes of the node ist this NOTE:
Blockquote Notes:
- The temperature values is in °C and the humidity values are % relative humidity.
- If you're using an older release of the DHT2385 driver, you will have to run node-RED as root, otherwise you may run into problems with permissions.
I am using the last BMC2385 version.