Hi Hansolo,
Thanks for your response, looks like you are spot on, but I will have a look at it and update.
By turning the poles from +5v to GND, it did start to work but much later, maybe that happened because whats coming in the next sentence. Yes! the SOCAT does get flooded with the POT even without attaching anything to the Arduino and running it. So should I use your setting to fix it? In the potentiometer.h file?
BTW, how do you find this Potentiometer.h file for the modification?
I have added Ian's modded for the encoder, will check it and update here.
Other Questions, related to Arduino IDE, When do we use the example files given in DCS Bios, e.g. Default serial, IRQ serial, RS485master and RS485slave?