Getting incorrect humidity readings on all BME280 sensors.

[adityaponkshe]

Hello,

In my project, I am using BME280 sensors along with Arduino to monitor the humidity and temperature of an indoor farm. Currently, I have 10 BME280 sensors in my inventory. These are from Adafruit. For description, this is the link. 

The issue I'm facing is - all 10 sensors are showing relative humidity 10% to 12% lower than the actual humidity.

I am cross-checking the humidity values with actual dry-wet bulb hygrometers and also handheld digital hygrometers (link). All these devices show humidity 8% to 12% more than BME280 sensors. 

Can anyone help me to fix this issue? 

Thanks,

Aditya Ponkshe

[handytech]

Would you be able to share more about the following:

• can you confirm that you are the official sensor API of this product, and if so which version of the implementation (32bit, 64bit or floating point) and what was the sensor's configuration?
• have you tried any of the reconitioning procedures mentioned in the datasheet before the test?
• since relative humidity is temperature-dependant, could you also share the sensor's temperature output as well as from the reference device?
• would you by any chance be able to run your tests also with the satured salt solution method?