ADS1115 only 15bit at differential measurement

[tim123]

The Adafruits_ADS1x15.py works in Single-ended mode fine for me (after some modifications), but in differential mode I should get 16bit instead of 15 to get results also for negative values.

The script contains to interesting lines:

Code: Select all

    result = self.i2c.readList(self.__ADS1015_REG_POINTER_CONVERT, 2)
...
    return ( (result[0] << 8) | (result[1] & 0xFF) )


result[0] delivers only values from 128 to 255.

Thanks

P.S.: I'm very happy with my ADC on the raspi.

[tim123]

Sorry error was on my side. Now it works fine. Makes fun to play with small signals from strain gauges.