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  1. You can lookup the locations using the mega2560 pinout and the Ultimaker2 board schematics. Pins 30 and 38 are on EXT/IO which is terminal J23. Top (1,2) are ground, middle (3,4) are 5V and bottom (5,6) are P30 (PC7) and P38 (PD7).
  2. Thanks amedee, this is really helpful! I will use more than 3 pins so that is why I want to use the analog pins as well.
  3. Hi, I'm interested in controlling some of the analog (ADC) pins as digital pins on the Ultimaker 2 board. I've seen that this can be done in Arduino using digitalWrite (https://www.arduino.cc/en/Tutorial/AnalogInputPins) and it also seems like it is possible to control them using the M42 command in marlin (http://marlinfw.org/docs/gcode/M042.html). Has anyone tried this or know if this is correct? I've found the pin map for the ATmega 2560 (https://www.arduino.cc/en/Hacking/PinMapping2560) and can determine the pin locations using the Ultimaker 2 schematics. However, I'm not sure how to inte
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