Does anyone have experience with the humidity and temperature sensor SHT20 I2C.
I need to install these sensors in a natural park .. and I was thinking to fix them to the trees, tying the with a rope (touching the white cover of the sensor) in order to avoid that it moves.
I am worried about the contact between the sensor and the wood .. whether this can produce variation in the measurements
How do you fix normally your sensors ?
I was also thinking to fix the black cable and leave "free" the sensor leaning .. however, in this case, i think that any movement can modify the measurements..
You can tie the casing to a tree, that is no problem for the sensor.
Since wood and bark can have a higher humidity, the sensor will measure that. If you want the air humidity, you have to keep it in the air.
I'm just guessing Can you try a few different things ? Tie a few sensors to the Arduino board. Every library should be able to allow more than one sensor. Then you can also spot a wrong sensor.
Don't overthink it. The air humidity is not something that is important as the temperature. If difference between 22°C and 23°C is notible. If you can measure 10%, 20%, 30%, and so on, for the humidity, that is perhaps already enough information.
DFRobot says that it is compatible with 5V arduino boards. But according to the datasheet it is compatible with 3.3V Arduino boards but not with 5V Arduino boards.
When you are using a MKR board with ARM M0+ processor or a (Arduino compatible) ESP, then you are okay. If you want to use a Arduino Uno, then the sensor does not like that without I2C level shifter.
Can you try a few different things ? Tie a few sensors to the Arduino board. Every library should be able to allow more than one sensor. Then you can also spot a wrong sensor.