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Hi guys, I'm writing some additional features to control the Bosch Accelerometer. Since now I implemented the g conversion which works great and I'm also putting the other advanced stuff like g selection/bandwidth and the threshold for motion detection. I will put the code on my google project.
See you soon!
The code is available here:
Looks good - I'll be happy to include something like this once you consider it ready, but I'll probably stay with integer values), to avoid the overhead of the floating point library. One option would be to return values as multiples of 0.001 - i.e. 3 implied decimals.
Yes you are right, I can write 2 versions one fixed point (basically integers with a multiple of the sensibility or similar) and one floating point for hard core applications. Today I also added the range and bandwidth settings. One question: why did you choose a Bosch accelerometer? I used to work with ST Micron or Freescale, it's just that I cannot picture together a drill and a mem device. :-)
The new BMA180 accelerometer is out, it looks like a good chap by the specs! Maybe you should include in the next gravity plugs!
Interesting - might even be a drop-in replacement. But I can't find a wholesale supplier for them...
Spakrfun has 341 in stock. http://www.sparkfun.com/commerce/productinfo.php?productsid=9723 and only 11 in stock for the SMD http://www.sparkfun.com/commerce/productinfo.php?productsid=9630
Hi,
I'm an Electronics/Arduino/JeeNode newbie and started with the regular tutorials and got my LEDs blinking in many different configurations quickly, jeeee ;-)
Now I decide to go for the next step,.. get my gravity plug working. I have been trying for two days now but no sign from my gravity plug. I understand I2C is simple, it seems not for me. What am I doing wrong?
Sofar, I have installed the libraries Ports and RF12, I run a JeeNode USB with the demo sketch:
#include
PortI2C myBus (1);
GravityPlug sensor (myBus);
void setup () {
Serial.begin(57600);
Serial.println("\ngravitydemo;
sensor.begin();
}
void loop () {
const int p = sensor.getAxes();
Serial.print("GRAV ");
Serial.print(p0;
Serial.print(' ');
Serial.print(p1;
Serial.print(' ');
Serial.println(p2; delay(1000);
}
From my serial port I get this
[gravitydemo]
GRAV -1 -1 -1
GRAV -1 -1 -1
GRAV -1 -1 -1
etc...
I tried many different configurations but still nothing worked.
Anyone who could tell me how to wire my plug to the JeeNode or I'm missing something?
Thanks!
Rik
Hooking it up: plug and port pins should match. You've attached it to port 1, right? Can you verify that "sensor.isPresent()" returns nonzero? Otherwise it's a hardware issue.
Jean-Claude, thanks for your swift reply. "sensor.isPresent()" does return me a zero. Conclusion its the hardware.
I have used a 6 pin to connect the plug, pins P to I, with these on P1. Again, I have tried different things but no improvements. I'm sure it is something stupid but I'm out of ideas,..
If you want, you can send it back. I'll check it out, and if it's broken, I'll send a replacement.
Weird though, all Gravity Plugs are tested after assembly.
Jean-Claude, Thanks for the offer. I'll test my RTC plug first to make sure its not something else. Keep you posted.
It was indeed the hardware, not the plug or my JeeNode... It appeared the plug was a bit loose on the port;-( Everything seems to work okay.
I'm getting this on my port now;
1 GRAV 20 -4 231
1 GRAV 22 -4 225
1 GRAV 19 2 233
Note, the first “1” is the sensor.isPresent()
Next step is to figure out how to translate this to m/s2 and to calibrate it when in a stable, horizontal position using gravity and some algebra ;-)