Berry GPS-IMU Accelerometer Issues

[Eric]

Hi,

I’m using a Berry GPS-IMU on a Raspberry Pi 2. The gyroscope and the magnetometer are giving me good outputs but I can’t seem to get anything but a constant value from the accelerometer.

This is my output from sudo /usr/sbin/i2cdetect -y 1:

0 1 2 3 4 5 6 7 8 9 a b c d e f
00: — — — — — — — — — — — — —
10: — — — — — — — — — — — — — — 1e —
20: — — — — — — — — — — — — — — — —
30: — — — — — — — — — — — — — — — —
40: — — — — — — — — — — — — — — — —
50: — — — — — — — — — — — — — — — —
60: — — — — — — — — — — 6a — — — — —
70: — — — — — — — 77

I ran gyro_accelerometer_tutorial03 and it shows AccXangle and AccYangle at a constant -45 and 45, respectively.

Do you have any ideas of what the issue is? What can I do to test if the accelerometer is running properly?

Thank you!

Eric

[PeterP]

we need to look at the raw values for the accelerometer.
What code are you using?

Peter --OzzMaker.com --

[Eric]

I’m mainly using the Python code in the python-BerryIMU-gryo-accel-compass folder.

By raw accelerometer values, you mean ACCx, ACCy, and ACCz as given in the berryIMU.py file, correct?

[PeterP]

yes, they are the values we need.
could you place the IMU on a flat service.. don’t move it.. show me what those values are. would need about 50 samples.

Peter --OzzMaker.com --

[Eric]

I put in this line of code into the BerryIMU-simple.py file after the “if 1: print” lines.

if 1:

print (“ACCx %5.2f \33[1;34;40m ACCy %5.2f \33[1;31;40m ACCz %5.2f” % (ACCx, ACCy, ACCz))

I’ve run the program 10 times, rebooted, and tried another 10 times with varying run times and each time I get the same constants. ACCx = -24539, ACCy = -24539, and ACCz = 24539.

Attachments:

1. 

   berryIMUsimpleoutput.png
   

[PeterP]

Hi Eric
it looks like there is something wrong with the accelerometer on your IMU.

can you please forward your receipt of sale to sales< @ >ozzmaker.com.
We may have to send you out a new one.

Peter --OzzMaker.com --

[Eric]

My supervisor David just sent out a receipt. Please let me know if there’s anything else I can do or if you need any more information.

Eric

[Author]

Posts