BerryGPS-IMU v3 has been specifically designed for the Raspberry Pi Zero. It is also compatible with all other versions Raspberry Pi.

BerryGPS-IMU v3 is a GPS module which also includes all the sensors found in the BerryIMU v2.

The sensors found on the BerryGPS-IMU v3 are:

1. GPS 
2. Accelerometer
3. Gyroscope
4. Magnetometer (Compass)
5. Barometric/altitude
6. Temperature

GPS

BerryGPS-IMU v3 uses the CAM-M8 from uBlox, which is an advanced high quality GPS module.

3 concurrent GNSS:  Concurrent reception of up to 3 GNSS (GPS, Galileo, GLONASS, BeiDou)

Embedded Antenna: Embedded, omnidirectional and wideband antenna

Super Cap: The SuperCap keeps the ephemeris data stored in the battery backup RAM for 2 hours.  This allows for faster acquisitions when the module is power cycled.

Fix and PPS indicator:  The on board LED will flash once a second when a fix has been obtained. The PPS signal is also presented on an output pin.

Time Pulse Output (PPS): 0,25Hz - 10MHz (default 1Hz)

Protocols:NMEA, UBX binary, RTCM

Update Rate: Single GNSS - up to 18Hz, Dual GNSS up to 10Hz

Connection for external antenna: BerryGPS-IMU v3 also includes a uFL connector for an external antenna, which can be used when BerryGPS-IMU v3 doesn't have clear access to the sky.

u-Center: A graphical interface to test and configure the  GPS module on the BerryGPS-IMU

Technical specifications

Dimensions; 65 mm x 30 mm

Weight =  6gm

GPS Module CAM-M8

• Low current consumption, <200uA when using Periodic mode.
• Receiver Type;
  72-channel u-blox M8 engine
  GPS/QZSS L1 C/A, GLONASS L10F,
  BeiDou B11, Galileo E1B/C
  SBAS L1 C/A: WAAS, EGNOS, MSAS, GAGAN
• 3.3v supply
• NMEA, UBX binary, RTCM
• UART  4800/9600/38400/115200/230400/460800 bps
• Max update rate 10 Hz
• Horizontal position accuracy <2.5m CEP
• Acquisition sensitivity -148dBm
• Tracking sensitivity -167dBm
• Hot start <1s
• Assisted start <3s
• Cold start <26s
• Orbit prediction
• 1PPS Sync
• Fix/PPS LED
• One external pin for wake up
• Embedded antenna
• Connector for external antenna
• SuperCap to help store ephemeris data.

IMU

An inertial measurement unit, or IMU, measures and reports on velocity, orientation and gravitational forces, using a combination of an accelerometer, gyroscope and a magnetometer.

BerryGPS-IMU v3 is also fitted with a barometric sensor (BMP280) which can be used to calculate altitude. A temperature sensor is also included.

IMUs can be found in devices like, quad copters, smart phones, segways, Wii Remote etc.. and are used to sense movement and orientation.

BerryGPS-IMU v3 is compatible will all models of Raspberry Pi, including Pi 2, Pi 3 and Zero.

Technical specifications

IMU sensor LSM9DS1

Gyroscope 

• i2c and SPI  interface
• Measurement range ±245/±500/±2000 dps
• Sensitivity 8.75, 17.50, 70.00 mdps

Accelerometer 

• i2c interface
• Scales of ±2g / ±4g /  ±8g / ±16g

Magnetometer 

• i2c interface
• Magnetic field full scale of  ±4 / ±8 / ±12 / ±16 gauss.
• Internal temperature sensor

Barometric Sensor BMP280

• i2c interface
• Pressure range 300 ... 1100 hPa
• Resolution of data: Pressure: 0.18 Pa (eqiuv. to <10 cm)
• Absolute accuracy  ±1 hPa
• Relative accuracy ± 0.12 hPa (equiv. to ±1 m)
• Temperature range -40  ...+85 °C

BerryGPS-IMU v3 should only be powered with a 3.3v power supply.

BerryGPS-IMU v3 comes with;

• BerryGPS PCB
• 1 x female header
• 4 x nylon standoffs, nuts and screws

Raspberry Pi and Antenna are not included.

Some very basic soldering is required to solder on the female header.

BerryGPS-IMU Guides and Tutorials

For the GPS;

• BerryGPS setup Guide for Raspberry PI
• BerryGPS Data logger using a BerryGPS
• Navigating with Navit on the Raspberry Pi
• Use u-Center graphical interface to control GPS

For the IMU, In this order;

In this order;

• Guide to interfacing a Gyro and Accelerometer with a Raspberry Pi
• Guide to interfacing a Gyro and Accelerometer with a Raspberry Pi - Kalman Filter
• Create a Digital Compass with the Raspberry Pi – Part 1 – “The Basics”
• Create a Digital Compass with the Raspberry Pi – Part 2 – “Tilt Compensation”
• Create a Digital Compass with the Raspberry Pi – Part 3 – “Calibration”
• Create a Digital Compass with the Raspberry Pi – Part 4- “Smartphone Replica”
• Converting values from an Accelerometer to Gs – “ Proper Acceleration”
• How to Create an Inclinometer using a Raspberry Pi and an IMU
• Raspberry Pi Digital Spirit Level