BMP388 not detected in I2c

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  • #18727
    hassaniqbal209
    Participant

    Hi, I have BerryGPS-IMUv4 with version 4.1 PCB. I am using Raspberry pi 4 Model B to interface. I am able to get GPS signals, as well as accel and gyro measurements. For the barometer, I can’t get it working. It seems the pressure sensor is never detected as there is no 0x77 here. What could be a fix for this?

     

    sudo /usr/sbin/i2cdetect -y 1

    0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f

    00:                         — — — — — — — —

    10: — — — — — — — — — — — — 1c — — —

    20: — — — — — — — — — — — — — — — —

    30: — — — — — — — — — — — — — — — —

    40: — — — — — — — — — — — — — — — —

    50: — — — — — — — — — — — — — — — —

    60: — — — — — — — — — — 6a — — — — —

    70: — — — — — — — —

    Secondly, when I run

    sudo python bmp388.py

    I get

    BMP388 Test Program …

     

    Traceback (most recent call last):

    File “/home/pi-rover/BerryIMU/python-pressure-sensor-BMP280-BMP388/bmp388.py”, line 210, in <module>

    bmp388 = BMP388()

    ^^^^^^^^

    File “/home/pi-rover/BerryIMU/python-pressure-sensor-BMP280-BMP388/bmp388.py”, line 75, in __init__

    if self._read_byte(BMP388_REG_ADD_WIA) == BMP388_REG_VAL_WIA:

    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

    File “/home/pi-rover/BerryIMU/python-pressure-sensor-BMP280-BMP388/bmp388.py”, line 91, in _read_byte

    return self._bus.read_byte_data(self._address, cmd)

    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

    OSError: [Errno 121] Remote I/O error

     

    Please advise how to resolve these issues

    #18728
    Mark Williams
    Keymaster

    Hi… it does indeed look like the BMP388 isnt working.  Have you made any modifications to the PCB?  (E.g. cut tracers).
    The BMP388 is the silver square component.. does it look like there are any problems near it? E.g. a component missing..  Maybe upload a picture.

     

    Mark --OzzMaker.com --

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