Problem with loudness sensor

Products & Technology Grove
#1

I am trying to measure noise with a loudness sensor, but i get very unstable readings

If I connect it to 3.3v, then I get readings between 5 and 450 even with the most possible loudness.
Also values varies a lot even in a quiet room.

If I connect it to 5v, then I get values between 3 and 10. (like there are no real signal on the analog pin).

Data sheet says that I should expect values between 0 and 1023. What am i doing wrong.

#2

What hardware platform did you test it on? The Arduino UNO that we used.

#3

No, i use a nodemcu board. Is that a problem?

#4

I’m not sure, maybe it’s better for you to test for hardware problems with Arduino UNO first.