Home › Forums › Forums › Technical Support for BerryGPS and BerryGPS-IMU › Can I add other I2C devices with BerryGPS-IMU v3
- This topic has 5 replies, 2 voices, and was last updated 2 years, 4 months ago by Mark Williams.
- January 26, 2021 at 3:57 pm #16535
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! -JimJanuary 26, 2021 at 4:02 pm #16536
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.January 26, 2021 at 4:06 pm #16538Mark WilliamsKeymaster
correct, you worked it out.
BTW: uSCL & uSDA connect directly to the GPS module only.
Mark --OzzMaker.com --January 27, 2021 at 4:50 am #16539
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…January 27, 2021 at 4:19 pm #16544Mark WilliamsKeymaster
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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