Can I add other I2C devices with BerryGPS-IMU v3

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  • #16535
    jimb
    Participant

    Hello, I have a few BerryGPS-IMU V3s for various projects and on one set up, I would like to add a small I2C OLED display but, the BerryGPS-IMU covers the GPIO pins so, I cannot access to add this other device. I see on the BerryGPS-IMU that there are 2 pins labeled uSCL and uSDA; are these for adding external I2C devices? If not, is there a way to do this without soldering to the BerryGPS-IMU header?

    I tried using /dev/i2c-0 but, apparently, this is not straightforward (I had not accounted for adding extra pullup resistors etc) so, I am hoping that there is a simple way to add other I2C devices.

    Thank you! -Jim

    #16536
    jimb
    Participant

    OK, nevermind… I noticed on a photo in another post that there are SCL and SDA pins on the board! My set up is powering the Pi Zero W through the 5v and gnd pins and my connector was covering the SDA and SCL pins. D’oh! Sorry for the pointless post.

    • This reply was modified 1 year, 8 months ago by jimb.
    #16538
    Mark Williams
    Keymaster

    correct, you worked it out.
    BTW: uSCL & uSDA connect directly to the GPS module only.

    Mark --OzzMaker.com --

    #16539
    jimb
    Participant

    Thanks for the follow up… here are a couple of photos of the work in progress…

    Should I consider jumping from the v3 to the v4? What are the main advantages? I am using a Pi Zero W and, it sounds like the v4 has been optimized for the Zero…

    wiring to BerryGPS-IMUv3oled

    • This reply was modified 1 year, 8 months ago by jimb.
    • This reply was modified 1 year, 8 months ago by Mark Williams.
    #16544
    Mark Williams
    Keymaster

    Nice!
    The GPs, pressure sensor and formfactor are the same for V3 and V4.
    Here are the major changes;
    +The IMU is different.V4 has a better quality IMU, but most people will not notice.
    The big difference is faster output rate (6,664 times a second) for the gyro and accelerometer.
    +V4 also has QWIIC connectors
    +You can now communicate with the GPS module via i2c, you need to solder some jumpers to do so. this method doesn’t work with GPSD and is for advance users
    +v4 includes a led for power
    +v4 also include level shifters, which means you can connect it directly to a 5v device (e.g. Arduino)

    Mark --OzzMaker.com --

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