BerryGPS-IMU - GPS and 10DOF for the Raspberry Pi - Accelerometer, Gyroscope, Magnetometer and Barometric/Altitude Sensor

I ran the IMU at 100Hz, though adjustable (I recall ... been a while). I ran the GPS at 1Hz. Only problem from my perspective is that the IMU and GPS are disconnected, that is, the supplied IMU code does not query the GPS. I found it difficult to coordinate the timing of the IMU and GPS. Time stamps are not common.

There are numerous IMU and GPS solutions for the raspberry pi. What sets this product apart are the following ... 1. IMU and GPS are integrated into a single module. Many other solutions require separate IMU and GPS chips/boards, which puts more burden on the user to figure out connections to the 40 pin header. The BerryGPS-IMUv3 integrates everything and consolidates the interfaces to the first 10 pins of the header. It also has through-holes nearby that make these pins available for other purposes if a user needs these for another device. In short, a thoughtful design. 2. The module also includes a common Bosch pressure transducer that provides measurements to infer altitude for an altimeter. Together with the 9-axis (accel/gyro/mag) this gives a nice 10-DOF capability. Again, one can add the pressure transducer separately to get the same capability, but the integration into the single board makes this much more plug-and-play from a mechanical/pin-use standpoint. 3. The module is compact! Given all of the sensors/chips included, it takes up much less space than if one assembled a system from the other discrete IMU, GPS, and barometric pressure sensors. 4. The manufacturer maintains a website and associated forums. The documentation here really is what sold me in addition to the other solutions at similar price points; those alternatives basically consist of pointing you to datasheets. To be fair, AdaFruit modules have a nice circuitpython library to have software support for its sensors. However, many of those can be used for this module too, as it uses some similar chips. (I preferred to ultimately write my own for efficiency/correctness of some of the nuanced details, but the main point is that documentation and software resources is another strong point of the BerryGPS-IMUv3 compared to other offerings.) 4. The GPS module supports either the internal antenna on the u-blox M8 GPS receiver or an external active antenna. NB: It was not apparent to me when ordering that the external antenna is required to be an active antenna. To use a passive antenna you need to make a small mod to board. I had a question about this and the manufacturer (Ozzmaker) was very responsive and helpful. 5. Great support. See #4 above. All in all, a great module for $50 US.

The accelerometer, gyroscope, and GPS work great. Unfortunately, even after extensive troubleshooting, I could not get reliable readings from the magnetometer. After reading through the reviews, there is a high probability of receiving a defective unit.

Honestly this project was alot of fun, i mostly needed the GPS function of this hat. and it was a little finnicky getting it to work in my project. i was building a HAM Radio APRS Digipeater, that could GEOlocate itself using the onboard GPS. I did get it to work reliably, and was trying to integrate the IMU functions to show speed, acceleration etc. however those werent necessary for my project so I shelved it. I would like to see this integrated into something like a Stratux Device as an Allin one GPS IMU if anyone takes on that project it would be fun to see. All of the drivers and packages are on the Berry Website definitely requires a lot of patience, or much higher computer knowledge than I have.

It was well packaged, I'd ordered by mistake but many others swear by it.