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All Projects → Razor-AHRS → Razor 9dof Ahrs

Razor-AHRS / Razor 9dof Ahrs

Licence: other
AHRS Firmware for the SparkFun 9DOF Razor IMU and SparkFun 9DOF Sensor Stick

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arduino

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Razor AHRS v1.4.2

9 Degree of Measurement Attitude and Heading Reference System for Sparkfun 9DOF Razor IMU (SEN-10125 and SEN-10736) and SparkFun 9DOF Sensor Stick (SEN-10183, SEN-10321 and SEN-10724)

Infos, updates, bug reports, contributions and feedback: https://github.com/ptrbrtz/razor-9dof-ahrs

Download

Clone the repository on GitHub or download as .zip.

Tutorial

You find a detailed tutorial in the Wiki.

Quick setup

Razor AHRS Firmware and Processing Test Sketch

Select your hardware in Arduino/Razor_AHRS/Razor_AHRS.ino under "USER SETUP AREA" / "HARDWARE OPTIONS". Upload the firmware using Arduino.
Run Processing/Razor_AHRS_test/Razor_AHRS_test.pde using Processing.

Optional: Mac OS X / Unix / Linux C++ Interface

Compile test program:

g++ Example.cpp RazorAHRS.cpp -Wall -D_REENTRANT -lpthread -o example

Run it:

./example

Sorry, no Windows support. But you could try to compile using cygwin.

Optional: Android Interface

About Razor AHRS and Android Bluetooth: Bluetooth seems to be even more picky on Android than it is anyway. Be sure to have a look at the section about Android Bluetooth in the tutorial.

Compiling and running the test app: Open up your Android-ready Eclipse and import both projects using File → Import... → General → Existing Projects into Workspace with the root folder being Android/. Then build and run the test app from Eclipse.

Building your own app:

  • Your app needs to target Android 2.0 (API Level 5) or later. The RazorAHRS Library Project has to be present in your Workspace. Add the library to your app under Project Properties → Android → Library.

  • In case you want yaw/heading to reference "true north" and not just magnetic north, you can use the included DeclinationHelper class to find out about declination at your current position.

  • You have to specify these uses-permissions in the AndroidManifest.xml:
    android.permission.BLUETOOTH and android.permission.BLUETOOTH_ADMIN

  • If you want to use the DeclinationHelper class you also need:
    android.permission.ACCESS_FINE_LOCATION and android.permission.ACCESS_COARSE_LOCATION

Donation

If the code and the tutorial helped you and you'd like to buy me a beer to say thanks, I'll be happy and say cheers!

PayPal:

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