Hi Leo.
Some time ago I purchased a couple of these to play with. I fitted Bourns PEC11 series encoders and found the device to work very well with Arduino and the appropriate Seesaw library. There is a link on the Core site re Circuit Python code which should shed some light on the problem.
The only down side is the time taken to recover the positional information which is in the order of 1.3mSec. Did not suit what I was trying to do at the time. I did quite a few experiments at the time and post is here if you are interested.
Adafruit I2C QT Rotary Encoder with NeoPixel - STEMMA QT / Qwiic.
I have since overcome the timing problem with some help from this Forum and a lot of searching and now have a useable pulse generator with an Arduino UNO. I have not built it up as a project as I personally have no use for it (have a very capable function generator) but will publish as a Forum topic soon.
Cheers Bob
