Arduino IDE does not find msg header

asked 2014-08-12 23:10:27 -0500

jcicolani
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I'm trying to learn rosserial_arduino. I've worked through the tutorials and am now going back and walking through them with my own code. My initial test code will use rosserial_arduino to turn 8 LEDs on and off. I've created the package (arduino) and a custom message called 8Leds.msg. I added the lines per the tutorials to package.xml and CMakeLists.txt. I source my files and run catkin_make. Everything seems to compile properly and the 8Leds.h file is created in devel/include/arduino. However, when I try to compile the sketch for the arduino I get this error:

In file included from light_8_leds_test.ino:2:0: /home/jcicolani/catkin_ws/devel/include/arduino/8Leds.h:42:18: fatal error: string: No such file or directory compilation terminated.

I don't get it. It's even showing the exact path and file name.

Thoughts?

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answered 2014-08-13 01:30:51 -0500

Wolf

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You need to run the following again everytime you changed/added msg files in your workspace:

  cd <sketchbook>/libraries
  rm -rf ros_lib
  rosrun rosserial_arduino make_libraries.py .

See: http://wiki.ros.org/rosserial_arduino...

Note that your arduino code needs to be compiled against the headers in your <sketchbook>/libraries folder, not against those in your catkin workspace....

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answered 2014-08-13 01:32:15 -0500

Andromeda
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updated 2014-08-13 01:33:49 -0500

Navigate to your sketchbook folder and try to compile the libraries for arduino again. Simply do again the following steps (like in this tutorial).

cd <sketchbook>/libraries    
rm -rf   ros_lib   
rosrun rosserial_arduino   make_libraries.py .

You have created the msg files for ROS but they must be compiled for Arduino too. Running the above command you should get them compiled

Regards

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I ran the commands. However, I am now getting: * Warning: failed to generate libraries for the following packages: * map_msgs arduino

All of the help I've seen in my Google and ROS Answers searches to date say to ignore the map_msgs (fine, not using it anyway) but there is nothing on troubleshooting what causes it or how to track down the problem for custom messages.

jcicolani ( 2014-08-13 13:17:36 -0500 )edit

ignore it. I use without problems rosserial_arduino and I get always the message about map_msgs

Andromeda ( 2014-08-13 13:36:42 -0500 )edit

Map_msgs isn't the problem. It also failed to generate the libraries for my custom messages, which I need.

jcicolani ( 2014-08-13 13:56:11 -0500 )edit

Do you mean, that after running the python-script again doesnt create any folder with your message definition in your ~/sketchbok/libraries ? You should see in ros_lib a new flder with the same name of your custom msg. Inside there are the .h files

Andromeda ( 2014-08-14 01:20:38 -0500 )edit

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