using joystester2 is harder to see,
but yes, it does gives me the same changing sensor values.

I also try changing the old magnet that I got from dvd player
to a stronger one: 10mm x 10mm x 10mm cube neodymium magnet.

however, with the new one I get lesser values,
do I have to position the HALL sensor further away from the magnet if I use stronger magnet?