I would like to use the adafruit cap touch display with my grove pi: https://learn.adafruit.com/adafruit-2-8-pitft-capacitive-touch/. The screen physically fits just fine, but it seems to use the same i2c gpio pins. The grovepi works fine without the screen software installed. Once we install the software for the screen, then the screen works, but then the grovepi doesn’t work. When we test the grovepi with i2cdetect, the results indicate that it won’t work, and if we run various Python scripts we get nothing but IOErrors when trying to talk to grove sensors.
I know the I2C bus can be tricky to use and to stack multiple devices on. The pullups on them might be falling.