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.