micro-ROS/micro_ros_raspberrypi_pico_sdk

micro-ros-agents stops executing when connecting RPi Pico, gives "open device error"

sejego opened this issue · 3 comments

sejego commented
  • Hardware description: Raspberry Pi Pico
  • Installation type: cloned micro-ros from Github repo and built it. (e.g. i did not use snap/docker to run it)
  • Version or commit hash: latest for foxy

Steps to reproduce the issue

  1. Flash the example code on the Raspberry Pi Pico
  2. Run the micro-ros-agent for serial output with
    ros2 run micro_ros_agent micro_ros_agent serial --dev /dev/ttyACM0 baudrate=115200
  3. connect Raspberry Pi Pico to PC

Expected behavior

micro-ros-agent recognizes that there is a connection in serial and starts accepting messages

Actual behavior

Open device error and micro-ros-agent stops executing

Additional information

Provided log:

sejego@pop-os:~/microros_ws$ ros2 run micro_ros_agent micro_ros_agent serial --dev /dev/ttyACM0 baudrate=115200
[1646397373.328044] error    | TermiosAgentLinux.cpp | init                     | open device error      | device: /dev/ttyACM0, errno: 13. Please re-run with superuser privileges.
Error while starting serial agent!

Previously I was running the agent with connected Teensy 4.0, everything was working smoothly.

pablogs9 commented

device: /dev/ttyACM0, errno: 13. Please re-run with superuser privileges.

sejego commented

Yeah, indeed changing rules on /dev/tty/ACM0 fixes the problem.
Is it a normal behaviour that Pico required such a step and other boards do not?

pablogs9 commented

I guess that it depends on your system permissions.

I'm closing, please feel free to reopen if you have further questions.

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