Hi there,
I have been trying to build a simple line following robot using a Feather nRF2832 with a Feather Motorwing and a Pololu QTR-8RC digital sensor array (that you can see here if you are not familiar with it https://www.pololu.com/product/961)
Everything works fine on an Arduino Uno, I can read values from the sensor as expected using the library examples. When moving across to the Feather, I can't seem to get very nice readings from the digital input pins. I can only get 3 values, it looks like it's dividing the voltage in 4 sections (something like 1000, 780, 390, 0), really odd. Is there any settings on the nRF52 that I can play around with? I have tried using digital pins (27, 30) and analog pins (a0, a1 or 2, 3) - same results.
(I thought it could be something with the motorwing but I tried without it and it's the same result... I have also tried 2 different nRF52 boards just to be sure).
(I had initially tried using a Feather Huzzah as well, but then realised (?) there are not 2 digital pins available that are not shared with the SPI lines..)
Any help would be greatly appreciated!
Thanks, G