Good morning,

I have a problem with URM09 (i2c version).

I use it with raspberry pi zero w.

Connection and code are correct.

i have noticed that if i put urm09 near raspberry, then urm09 returns unstable measures (random between correct measure +/- 3 or 4 cm, sometimes returns 0). if i put urm09 at the max distance from raspberry (connection is made with jumper wires 20 cm), then the measure is correct and stable.

i suppose there are some interferences, but i don't know what and why.

i have bought in the last few months at least 5 urm09 and they all do the same thing.

same thing with both 5v original power supply of raspberry kit and with other 5v power supplies.

i tried also with different pi zeros, same thing.

can pi zero w generate electromagnetic interferences? or maybe the magnetic field generated by the current flowing in the jumper wire? or maybe interferences with wifi?

someone can help me? thanks