Lidar A2M12 - Error, operation time out. RESULT_OPERATION_TIMEOUT!

[jayro-zaid]

Dear community,

A few weeks ago, the company where I am working acquired a Lidar A2M12, and I have followed these tutorials, but nothing works!

a) http://wiki.ros.org/rplidar b) https://github.com/robopeak/rplidar_ros/wiki

I want to explain to you step by step my procedure, in such a way that you can give me a solution or suggestion about this huge problem that I have, since we are in the middle of a project.

I am using a virtual machine with Ubuntu 20.04 and ROS Noetic. I am powering the lidar with a mobile phone charger of: 5V, 2A.

Step 1 First, I cloned the RPLIDAR ROS package (https://github.com/slamtec/rplidar_ros) in my catkin's workspace src folder:

Output:

Then, I ran catkin_make to build rplidarNode and rplidarNodeClient:

Output:

Step 2 I set the permissions for the rplidar device. For that, I opened the original file rplidar.rules:

Output:

And then, I have done the settings below (according to http://wiki.ros.org/rplidar):

I saved the new rplidar.rules file, and finally I ran the script ./create_udev_rules.sh:

Output:

Now, I have the rplidar.rules file in /etc/udev/rules.d:

Step 3 Once I have changed the USB port remap, I changed the launch file about the serial_port value. This is the original rplidar.launch file:

This is the new rplidar.launch file:

The same procedure with the rplidar_a3.launch file:

The original rplidar_a3.launch file:

The new rplidar_a3.launch file:

Step 4 I checked the authority of rplidar's serial-port, and this is the result:

Then, I added the authority to write:

Step 5 Finally, I started the rplidar node. roscore initialization without any problems.

Error executing view_rplidar.launch!

I had read that in some cases the solution was to run view_rplidar_a3.launch, but I still get an error!

Please, if someone could give me a suggestion, solution, or tell me about a similar experience, I would be very grateful!

I look forward to your comments. Thank you in advance!

[GiladRobee]

i have the same issue in both ros2 foxy and ros2 humble (minus the ros1 specifics)
edit, i found out its about the baud rate of the serial coms. alternatively, you can use this: https://github.com/Slamtec/sllidar_ros2/tree/main it works great for me

[tony-slamtec]

It seems you are using RPLIDAR A2M12, whose baudrate should be 256000 instead of 115200. Please change serial_baudrate param in your launch file and try again.

And also, RPLIDAR consume much electricty, so please use a USB port that can provide more current.

[tugbakara]

Got the same but I couldn't solve with this package do you have any idea about it?

edit, i found out its about the baud rate of the serial coms. alternatively, you can use this: https://github.com/Slamtec/sllidar_ros2/tree/main it works great for me

[GiladRobee]

Got the same but I couldn't solve with this package do you have any idea about it?

edit, i found out its about the baud rate of the serial coms. alternatively, you can use this: https://github.com/Slamtec/sllidar_ros2/tree/main it works great for me

As mentioned before, this issue is mainly related to baud-rate issues (didn't go deep enough to see exactly how, but it is so based on my very little experience). so check the baud-rates specification of your lidar and change the relevant parameters. that should do the trick.

[tugbakara]

My lidar is s2e so it uses LAN cable.

[deyouslamtec]

It seems you are using RPLIDAR A2M12, whose baudrate should be 256000 instead of 115200. Please change serial_baudrate param in your launch file and try again.

And also, RPLIDAR consume much electricty, so please use a USB port that can provide more current.

Just refer to this