Thanks- I have not tested with PWM, but the shared GND with analog IN. With the BRE module, measurements using an acceleration sensor were ok using the GND and +5V from the AUX connector powering the sensor, but with the WC32 everything was zero, is there something different?
I did not find the information how much the +5V on the AUX connector may sink or what power source best for the sensor.
a lot of the sensor boards do not offere separate ground. and plugging them to a different voltage converter will certainly not improve the situation.
May be the tendency towards i2c is explained this way. not that much fuzzing around with additional capacitors...
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