I just ran the example code and it is measuring only 0v to 2.9v any higher voltage would not register, because I guess the 12bit 4095 is reached, but why is it reached at 2.9v and not 3.3v as supposed to?
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(256) EXAMPLE: calibration scheme version is Curve Fitting
I (266) EXAMPLE: Calibration Success
I (60276) EXAMPLE: ADC1 Channel[2] Raw Data: 4095
I (60276) EXAMPLE: ADC1 Channel[2] Cali Voltage: 2915 mV
I (61276) EXAMPLE: ADC1 Channel[2] Raw Data: 4095
I (61276) EXAMPLE: ADC1 Channel[2] Cali Voltage: 2915 mV
....