Are you powering the motor from the Arduino 5V rail? This is a bad idea,
risks damaging the Arduino, but here the problem seems to be interference,
probably due to the motor putting lots of noise onto the 5V rail.
Are you powering the motor from the Arduino 5V rail? This is a bad idea,
risks damaging the Arduino, but here the problem seems to be interference,
probably due to the motor putting lots of noise onto the 5V rail.