So the sensor seems to only get readings of 1 and 97. These readings are then sent by MySensors. If you are expecting anything else than 97 and 1, you'll need to investigate the sensor. Try printing the raw analog value (without map) and see if that gives a clue.

@fleshfear: ok got it also working. Thanks. mine works with 3.3V and 5V

You're welcome. It was for me also a struggle to get it working.