connecting multiple hokuyo UTM-30LX

[jangtu052]

hey guys, i am having trouble connecting multiple hokuyo sensors. I tried various type of launch files. down below isthe slightly modified default launch file

launch

group ns="left" node name="urg_node" pkg="urg_node" type="urg_node" output="screen" param name="ip_address" value=""/ param name="serial_port" value="/dev/ttyACM0"/> param name="serial_baud" value="115200"/> param name="frame_id" value="laser"/> param name="calibrate_time" value="false"/> param name="publish_intensity" value="true"/> param name="publish_multiecho" value="false"/> param name="angle_min" value="-1.5707963"/> param name="angle_max" value="1.5707963"/> remap from="scan" to="left_scan"/> /node> /group>

group ns="right"> node name="urg_node" pkg="urg_node" type="urg_node" output="screen"> param name="ip_address" value=""/> param name="serial_port" value="/dev/ttyACM1"/> param name="serial_baud" value="115200"/> param name="frame_id" value="laser"/> param name="calibrate_time" value="false"/> param name="publish_intensity" value="true"/> param name="publish_multiecho" value="false"/> param name="angle_min" value="-1.5707963"/> param name="angle_max" value="1.5707963"/> remap from="scan" to="right_scan"/> /node> /group>

</launch

(I have no idea why it doesn't show launch file correctly so I erased "<")

then second one runs for a instance and makes an error. like down below

[ INFO] [1511419973.276698778]: Streaming data. [ WARN] [1511419974.989649912]: Could not grab single echo scan. [ERROR] [1511419978.506572805]: Error count exceeded limit, reconnecting. [ERROR] [1511419984.335448520]: Error connecting to Hokuyo: Could not initialize Hokuyo: not connected. [ERROR] [1511419996.835947865]: Error connecting to Hokuyo: Could not initialize Hokuyo: not connected.

Any ideas??

[tonybaltovski]

Are you able to connect to each unit individually at /dev/ttyACM0 and /dev/ttyACM1?

[EchChou]

hi everyone I have the same problem then "jangtu052". I can't connect to multiple hokuyo. I'm using the next launche file:

<node ns="hokuyo1" pkg="urg_node" type="urg_node" name="hokuyo1" >
    <param name="port" type="string" value="/dev/ttyACM1" />
    <remap from="scan" to="scan1" />
</node>

I get the next error :

started roslaunch server http://localhost:44229/

SUMMARY

PARAMETERS

• /hokuyo0/hokuyo0/port: /dev/ttyACM0
• /hokuyo1/hokuyo1/port: /dev/ttyACM1
• /rosdistro: kinetic
• /rosversion: 1.12.14

NODES /hokuyo1/ hokuyo1 (urg_node/urg_node) /hokuyo0/ hokuyo0 (urg_node/urg_node)

ROS_MASTER_URI=http://localhost:11311

process[hokuyo0/hokuyo0-1]: started with pid [10037] process[hokuyo1/hokuyo1-2]: started with pid [10038] [ERROR] [1570697719.232256864]: Error connecting to Hokuyo: Could not open serial Hokuyo: /dev/ttyACM0 @ 115200 invalid response. [ERROR] [1570697719.531241951]: Error connecting to Hokuyo: Could not open serial Hokuyo: /dev/ttyACM0 @ 115200 invalid response. [ERROR] [1570697725.406083508]: Error count exceeded limit, reconnecting. [ERROR] [1570697729.688121747]: Error connecting to Hokuyo: Could not open serial Hokuyo: /dev/ttyACM0 @ 115200 invalid response. [ERROR] [1570697733.871094387]: Error count exceeded limit, reconnecting. [ERROR] [1570697736.260121162]: Error connecting to Hokuyo: Could not open serial Hokuyo: /dev/ttyACM0 @ 115200 invalid response.

Someone can help please. Thank you.