OzzMaker BerryGPS-IMU V4

• GPS
• Accelerometer
• Gyroscope
• Magnetometer (Compass)
• Barometric/pressure sensor (altitude)
• Temperature

We have also made the BerryIMU compatible with the SparkFun QWIIC echo system.

We sell a QWIIC connector and cable for the Raspberry here. This does away with the need to solder headers onto the BerryIMUv when connecting to a Raspberry Pi.

GPS

BerryGPS-IMU v4 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 v4 also includes a uFL connector for an external antenna, which can be used when BerryGPS-IMU v4 doesn't have clear access to the sky.

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

An external antenna can be found here.

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 v4 is also fitted with a barometric sensor (BM388) which can be used to calculate altitude. A temperature sensor is also included.

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

Technical specifications of IMU

Gyroscope - LSM6DSL

• i2c and SPI interface
• Measurement range ±125/±250/±500/±1000/±2000 dps
• Sensitivity 4.375, 8.75, 17.50, 35, 70 mdps

Accelerometer - LSM6DSL

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

Magnetometer - LIS3MDL

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

Barometric Sensor BMP388

• i2c interface
• Pressure range 300 ... 1250 hPa
• Resolution of data: Pressure: 0.18 Pa (eqiuv. to <10 cm)
• Absolute accuracy ±50 Pa
• Relative accuracy ± 8Pa (equiv. to ±0.6 m)
• Temperature range -40 ...+85 °C

BerryGPS-IMU v4 is compatible with all models of Raspberry Pi, including Pi 2, Pi 3, Pi 4 and Zero as well Arduino

BerryGPS-IMU v4 comes with;

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

Raspberry Pi, Antenna or QWIIC connector 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
• BerryGPS-IMU FAQ

For the IMU

• 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
• Double-tap detection with BerryIMU