Making it work with ROS about ev3dev-lang-cpp HOT 9 CLOSED

I'll try to compile the tests when I have time (probably this weekend).

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I have no experience with ROS (actually have no idea what that is), but if you tell me what exactly you are trying to do with this library, I could try to help you.

To use the library you can just copy ev3dev.cpp and ev3dev.h files into your project and compile it however you do compilation (see the README for some more info). Something like CXX -std=c++11 -O3 -o myproject ev3dev.cpp myproject.cpp, where CXX is your compiler command.

If you want to use the library in stretch, you'll need to make a couple of changes, similar to ev3dev/ev3dev-lang-python@06ae05f. Namely, you'll need to change these parts of the code:

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Hi,

Sorry this post might not be helpful. I’m currently away for work with limited internet access... but I just wanted to link this to another issue:

moriarty/ev3dev_ros_demo#1 (comment)

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@ddemidov: for some reason I still can't connect to any of the sensors, motors, leds, battery, but the sound part of the test menu works fine and also the lcd part, but it looks like they are not dependent on connecting. What can be the problem?

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Are you using stretch?

from ev3dev-lang-cpp.

Yes and I have placed the ev3dev.cpp and ev3dev.h file in the src folder of my project and added it in my CMakelists file:
add_library(ev3dev src/ev3dev.cpp) My CMakelists file is in the project folder and the ev3dev files in the src folder.
I have also specified the library as a target link library:
target_link_libraries(ev3dev_test_node ${catkin_LIBRARIES} ev3dev ) target_link_libraries(ev3dev ${catkin_LIBRARIES} )
I have tried to put some cout calls in the ev3dev.cpp file, but they didn't get printed in the terminal.

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I have also checked that the SYS_ROOT matches the root of the classes on the EV3. Also I can see the sensors and motors and their values via the LCD screen.
Sorry i'm new to C++, so my questions might be flawed them self.

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Meanwhile, could you please check if #30 helps you? It affects leds, buttons, and port names. Note that if you use strings to specify addresses, as in

ev3dev::large_motor m("outA");

then you should change that to

ev3dev::large_motor m("ev3-ports:outA");

or, better yet, use the provided constants:

ev3dev::large_motor m(ev3dev::OUTPUT_A);

from ev3dev-lang-cpp.

thank you so much @ddemidov made the test node run the motor and it registered the sensors, thank you, thank you, thank you.
It was a matter of changing the port names.
Still an issue with the leds, but I don't need to work in my project.

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