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Razor_imu_9dof can't see my Sparkfun IMU (14001)?

asked 2018-05-09 12:32:05 -0500

roach374 gravatar image

updated 2018-05-10 05:50:41 -0500

gvdhoorn gravatar image

I'm running kinetic on Ubuntu 16.04 (x86).

I've followed the instructions for razor_imu_9dof, for the Razor SEN-14001 M0 board from Sparkfun. I flashed the AHRS firmware, and installed all the relevant ROS packages. I am able to see the IMU spewing data on /dev/ttyACM0, by running cat or screen.

However, when I run

roslaunch razor_imu_9dof razor-pub-and-display.launch

I just get the error:

[ERROR] [1525842655.072800]: IMU not found at port /dev/ttyACM0. Did you specify the correct port in the launch file?

What am I doing wrong? Is there a way to troubleshoot?

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Just to check you're not trying to run the launch file at the same time as viewing the output using cat or screen are you?

PeteBlackerThe3rd gravatar imagePeteBlackerThe3rd ( 2018-05-09 15:26:52 -0500 )edit

No, I did that separately, add part of my naive attempt to troubleshoot. One thing I did notice though, the /dev/ttyACM0 device is owned by root/dialout. Maybe it's a permissions issue? I tried running sudo roslaunch, but it barfed with "unrecognized command".

roach374 gravatar imageroach374 ( 2018-05-09 15:55:28 -0500 )edit

if cat can read from the port then it should be fine. You can always use chmod to set the permissions of /dev/ttyACM0 . Note they will be reset every time to plug it in.

PeteBlackerThe3rd gravatar imagePeteBlackerThe3rd ( 2018-05-09 16:06:52 -0500 )edit

We've got a few of these in our lab, I can check what the output should look like tomorrow so you can check the firmware is correct.

PeteBlackerThe3rd gravatar imagePeteBlackerThe3rd ( 2018-05-09 16:11:44 -0500 )edit

I think I've figured it out. It WAS a permissions issue. I added my user account to the dialout group, and things seem to be working fine now. Thanks!

roach374 gravatar imageroach374 ( 2018-05-09 23:09:02 -0500 )edit

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answered 2018-05-09 23:09:52 -0500

roach374 gravatar image

Turned out to be a permissions issue. I added my user account to the dialout group, and everything started working.

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This is the answer, but I can't accept it, since I don't have enough karma.

roach374 gravatar imageroach374 ( 2018-05-09 23:10:27 -0500 )edit

Glad you got this working

PeteBlackerThe3rd gravatar imagePeteBlackerThe3rd ( 2018-05-10 06:25:38 -0500 )edit

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Asked: 2018-05-09 12:03:45 -0500

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Last updated: May 10 '18