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Daisy System 9DoF Gyro, Compass, Baro., Accelero., Thermo., GPS US$133.00

DAISY-7
Daisy System 9DoF Gyro, Compass, Baro., Accelero., Thermo., GPS


The DAISY-7 module is a 9-Degrees-of-Freedom module which integrates MEMS Accelerometer, Gyroscope, Compass, Barometer and GPS receiver into a board measuring only 4 4 cm. This board is part of the modular Daisy System that can be controlled by the FOX Board G20 via the DAISY-1 Adapter, or by the Terra Board.

The Daisy ports that can be used are:

Port Serial device I2C device
Fox D1 /dev/ttyS2 /dev/i2c-0
Fox D6 /dev/ttyS4 /dev/i2c-0
Fox D8 /dev/ttyS3 /dev/i2c-0
Terra D10 /dev/ttyS4 /dev/i2c-0
Terra D13 /dev/ttyS2 /dev/i2c-1

Be sure to get a 0.05" pitch 2x5 IDC cable and a GPS antenna. They are not included.

Daisy System 9DoF GPS/MEMS Module Features

GPS chip: SkyTraq Venus638LPx

  • Up to 10 reads per second
  • 65 channels
  • Tests 8 million time-frequency hypotheses per second
  • Open sky cold start 29 seconds
  • Signal detection better than -161dBm
  • Accuracy 2.5m CEP
  • ~28mA in tracking and navigation mode
  • Multipath detection and suppression
  • Digital output interface type: Serial 3V3 level

3-axis linear digital accelerometer chip: ST LIS331DLH

  • Ultra low-power mode consumption down to 10A
  • 2g/4g/8g dynamically selectable full-scale
  • 16-bit data output
  • Generators for free-fall and motion detection
  • Sleep to wake-up function
  • 6D orientation detection
  • 10000g high shock survivability
  • Digital output interface type: I2C 3V3 level

Digital Gyroscope chip: ST L3G4200D

  • Ultra-stable three-axis
  • Three selectable full scales (250/500/2000 dps)
  • 16 bit-rate value data output
  • 8-bit temperature data output
  • Integrated low- and high-pass filters with user-selectable bandwidth
  • Ultra-stable over temperature and time
  • Embedded power-down and sleep mode
  • Embedded temperature sensor
  • Embedded FIFO
  • High shock survivability
  • Digital output interface type: I2C 3V3 level

3-axis digital compass chip: Honeywell HMC5883L

  • 3-axis magnetoresistive sensors and ASIC in LCC package
  • 12-bit ADC coupled with low noise
  • AMR sensors achieve 5 milli-Gauss
  • Resolution in 8 Gauss fields
  • Enables 1 to 2 compass heading accuracy
  • Low power consumption (100A)
  • Wide magnetic field range (8 Oe)
  • Sensors can be used in strong magnetic field environments
  • Fast 160 Hz maximum output rate
  • Digital output interface type: I2C 3V3 level

Digital pressure sensor: Bosch BMP085

  • Pressure range: 300 to 1100 hPa (+9000m to -500m altitude)
  • Low power: 5A at 1 sample/sec. in standard mode
  • Noise: 0.06 hPa (0.5m) in ultra-low-power mode
  • Noise: 0.03 hPa (0.25m) ultra-high-resolution mode
  • Noise down to 0.1m (rms noise) possible
  • Digital output interface type: I2C 3V3 level

DAISY-7 Code Examples

Python code

The following examples can work on the Fox Board or Terra Board. The different examples use different Daisy ports by default. See the serialdevice or i2c_bus and compare to the table provided above to determine or change the port.
  • gps.py gets NMEA messages from /dev/ttyS4 (Fox D6 or Terra D10) and shows them on the console
  • acc.py reads the accelerometer chip registers via I2C bus 0
  • gyro.py reads the gyroscope chip registers via I2C bus 0
  • magn.py reads the magnetometer (compass) chip registers via I2C bus 0
  • baro.py reads the barometer chip registers via I2C bus 0
  • coordinates.py gets NMEA message GGA Global Positioning Systems Fix Data from /dev/ttyS2 (Fox D1 or Terra D13) and shows on the console Latitude and Longitude both as NMEA coordinates and as Google Maps API3 coordinates, plus provides a Google Maps URL that you can enter into your web browser to see your exact location

C code

This C code example gets data from the gyro, accelerometer, magnetometer, barometer and GPS, showing them on the console terminal.

Complete Altitude & Heading Reference System

See also the complete Fox AHRS Linux image and source for the Fox Board with the DAISY-7, plus Windows GUI. For details, read the overview page.

Daisy System 9DoF GPS/MEMS Module Resources


Optional Recommended Products for this Item
2x5 (10-pin) 0.05" pitch IDC Connector Flat Ribbon Cable, 20cm+ US$2.60
GPS Antenna with 5m Cable & SMA Male Connector, Magnetic Mount+ US$12.95

This product was added to our catalog on Monday 17 June, 2013.

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