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hi i want to know how to change the LIDAR's frequency from 5.5 Hz to say 10 Hz . I know that it involves changing the PWM singal to the motors to increase its scan rate but how do i do it ? like where is the setting in the source code ?
thanks in advance
Hello,
The current Serial Module of the rplidar is not capable of generating PWM signals itself, therefore there is not an option to tweak in the source code, etc. But you need to use an external source to generate and feed the control signal to the device, e.g. an Arduino board, if you wish to modify the LIDAR's frequency.
You can find the devices PIN information in Section 3 of the devkit_manual.
and here you can read about how to work with PWM in Arduino.
Hope it helps.
I have changed the RPLIDAR A2 driver to accept the PWM frequency as a parameter at:
https://github.com/davidbsp/rplidar_ros
In the launch file that you use to start the laser driver, just add:
<param name="motor_pwm" value="..."/>
to the "rplidar_ros" node. The value is 660 by default.
I don't think it works on my RPLIDAR A1M8 :( Here is my launch file code:
<launch>
<arg name="motor_pwm" default="660"/>
<node name="rplidarNode" pkg="rplidar_ros" type="rplidarNode" output="screen">
</node>
</launch>
I think, my RPLidar speed doesn't change when I change the motor_pwm value.
Asked: 2015-11-16 23:59:32 -0500
Seen: 4,616 times
Last updated: May 21 '18
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anyone please?
Hi! Were you able to find answer? I'm currently having the same issue. Thanks!