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Arduino Header HMC6343
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#ifndef HMC6343_h
#define HMC6343_h
/**
 *  analog input 5 - I2C SCL
 *  analog input 4 - I2C SDA
 **/
class HMC6343
{
  private:
    // I2C Client Address of the sensor
    const static int i2cAddress= (0x32 >> 1);
    HMC6343(){};
  public:
    static int getAngle();
};
#endif
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Arduino CPP Code HMC6343
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#include "WProgram.h"
#include
#include
#include "HMC6343.h"
int HMC6343::getAngle()
{
   byte headingData[6];
   Wire.beginTransmission(HMC6343::i2cAddress);
   Wire.send(0x50);
   Wire.endTransmission();
   delay(2);
   Wire.requestFrom(HMC6343::i2cAddress, 6);
   int i = 0;
   while(Wire.available() && i < 6)
   {
     headingData[i] = Wire.receive();
     i++;
   }
   return (headingData[0]*256 + headingData[1])/10;
}

Hi!

Hope this might prove itself useful for somebody.

I wrote a library to simplify using this with the arduino, have a look at my github: https://github.com/n-ovesen/hmc6343/blob/

and please let me know if you find some bugs

How do these perform with vibrations?

I have two questions regarding the HMC6343.

1) I understand that the x, y, and z magnetic field readings are each returned as 2 byte value. What are the units for these values? How can I convert them to more familiar units, such as Gauss?

2) The temperature reading is also a 2 byte value. How can I convert this to degrees C?

could you please send me example AVR code?
mersi
turlan1979@yahoo.fr

can you add the breakout board to the SFE Eagle library please?

Is this supposed to have a temperature dependence?
I tried testing this over a range of temperatures using a peltier cooler and ended up getting a linear temp dependence.

Does anyone know if this comes with the board as shown in the image?

Why is this so gosh-darned expensive compared to all the other compasses you have? all the other bobs hover around 30 bucks or so. what does this one have over those?

Can someone post Arduino Uno code for this item? I can't get this working although my code looks right and I asked sparkfun to try and they seem to get nothing with my code.
I have this which doesnt work

include

define compass_ADR (0x32>>1)

byte data[6];
int x;
int y;
int z;
void getHeading()
{
Wire.beginTransmission(compass_ADR);
Wire.send(0x50); // command
Wire.endTransmission();
delay(5);
Wire.requestFrom(compass_ADR, 6);
for (int i=0; i

are there any socket/connectors for this?

I've run into a problem with the sensor where it does not cleanly detect a 360 degree rotation. The sensor seems like it gets 'stuck' at a certain angle and then makes a large jump to catch up. I'm thinking the sensor might have become magnetized. Has anyone else run into this problem?<br />
<br />
The datasheet says to degauss the sensor if this happens, but doesn't explain how to degauss the part. Is the degaussing part supposed to be common knowledge, or is there a specific way to perform it with this sensor?

FSD Penguin
Perhaps you can help me out with a bit of this code as well. It seems as though >int slaveAddress> and have to be dimensionalized.
I am using this code for autonomous navigation and when I placed it into the header file and into the main header, then I still had to create those two variables because they did not exist. In the header file, they are private.
So my question is, then what does one set the address to? I have it set to
Thanks

In the code example provided below (thank you!!!) I noticed that the wire.send is for 0x50, whereas the documentation specifies 0x32 for the heading. Can anyone clarify this? Thank you again.

Arduino CPP Code HMC6343

include "WProgram.h"

include

include

include "HMC6343.h"

int HMC6343::getAngle()
{
byte headingData[6];
Wire.beginTransmission(HMC6343::i2cAddress);
Wire.send(0x50);
Wire.endTransmission();
delay(2);
Wire.requestFrom(HMC6343::i2cAddress, 6);
int i = 0;
while(Wire.available() && i < 6)
{
headingData[i] = Wire.receive();
i++;
}
return (headingData[0]*256 + headingData[1])/10;
}

There's some code to interact with this module from an embedded X86 board running XP or Linux called RoBoard here

85958: _
...and if anyone is wondering im building an autonumus quad rotor ..._
Hi!
I am also building my own autonomous quad rotor, I would like to get in contact with you if you are interested to share few ideas...
my e-mail: buzzo182@hotmail.com
Let me know!

can you guys tell me what calculations are needed for the tilt compensation because i have the razor 6dof imu and probably getting the 3 axis magnometer so how do i use the accelerometer to do compensation for the compass
and if anyone is wondering im building an autonumus quad rotor

Does anyone know if this device is officially 5V I/O tolerant? The datasheet has no useful electrical specification data

I couldn't find this in the datasheet, but does this output pitch and roll tilt angles? Or just 1 tilt output?

Has anyone gotten this compass to work with the Devantech usb-i2c module? After frustrated coding, and finally scoping the data and clock lines, my conclusion is that this compass utilizes clock stretching which the Devantech module does not support. I would love to hear otherwise, if anyone has gotten it to work. Thanks.

Hey p07gbar I'm using this device with 5v output from my arduino and it's running fine.
And syvwich, yes, I do believe that that's what the cap is and that's what it is for as recommended in the HMC6343's datasheet.
Lastly, this thing is fun and easy to work with, but I may have accidentally reset my hard iron offsets because my compass heading is giving me errors. The tilt and pitch are fine though.
Thanks for breaking this out Sparkfun!
-bg

Can this chip cope with a +5V input for control logic?
Thanks

Hi there,
Could you please confirm that the small surface mount component to the left of the chip is a 1uF capacitor to eliminate noise from the power supply?
If it is not, could you say what it is, and what it is for?
Thanks!