Hi, I have now following configuration: I run [roscore] its fine working, Then I run [rosrun p2os_driver p2os _port:=/dev/ttyUSB0] this gives following message and Robot starts beeping slowly: [ INFO] [1281370470.607002468]: using serial port: [/dev/ttyUSB0] [ INFO] [1281370470.629593679]: P2OS connection opening serial port /dev/ttyUSB0... [ INFO] [1281370472.035840006]: SYNC0 [ INFO] [1281370472.236337347]: turning off NONBLOCK mode... [ INFO] [1281370472.436737196]: SYNC1 [ INFO] [1281370472.837168396]: SYNC2 [ INFO] [1281370473.437813521]: Done. Connected to Graz_3520, a Pioneer p3dx-sh [ INFO] [1281370475.840971113]: resetting raw positions Then I try to send some data on the topic /cdm_vel using command rostopic pub -1 /cmd_vel geometry_msgs/Twist [0.5,0,0] [0,0,0.5] this above command latches and sends velocity but Robot does not move. Then I run sicklms to get the laser topic /scan I get it successfully. Then I run [rosrun gmapping slam_gmapping] but it simly prints following messages: [ WARN] [1281370203.774895882]: Message from [/sicklms] has a non-fully-qualified frame_id [laser]. Resolved locally to [/laser]. This is will likely not work in multi-robot systems. This message will only print once. [ WARN] [1281370204.844090785]: MessageFilter [target=/odom ]: Dropped 100.00% of messages so far. Please turn the [ros.gmapping.message_notifier] rosconsole logger to DEBUG for more information. [ WARN] [1281370264.854017116]: MessageFilter [target=/odom ]: Dropped 100.00% of messages so far. Please turn the [ros.gmapping.message_notifier] rosconsole logger to DEBUG for more information. [ WARN] [1281370324.864063644]: MessageFilter [target=/odom ]: Dropped 100.00% of messages so far. Please turn the [ros.gmapping.message_notifier] rosconsole logger to DEBUG for more information. [ WARN] [1281370384.864359842]: MessageFilter [target=/odom ]: Dropped 100.00% of messages so far. Please turn the [ros.gmapping.message_notifier] rosconsole logger to DEBUG for more information. [ WARN] [1281370444.874204320]: MessageFilter [target=/odom ]: Dropped 100.00% of messages so far. Please turn the [ros.gmapping.message_notifier] rosconsole logger to DEBUG for more information. [ WARN] [1281370504.884523788]: MessageFilter [target=/odom ]: Dropped 100.00% of messages so far. Please turn the [ros.gmapping.message_notifier] rosconsole logger to DEBUG for more information. [ WARN] [1281370564.884886334]: MessageFilter [target=/odom ]: Dropped 100.00% of messages so far. Please turn the [ros.gmapping.message_notifier] rosconsole logger to DEBUG for more information. [ WARN] [1281370624.894070503]: MessageFilter [target=/odom ]: Dropped 100.00% of messages so far. Please turn the [ros.gmapping.message_notifier] rosconsole logger to DEBUG for more information. [ WARN] [1281370684.894523611]: MessageFilter [target=/odom ]: Dropped 100.00% of messages so far. Please turn the [ros.gmapping.message_notifier] rosconsole logger to DEBUG for more information. [ WARN] [1281370744.904024259]: MessageFilter [target=/odom ]: Dropped 100.00% of messages so far. Please turn the [ros.gmapping.message_notifier] rosconsole logger to DEBUG for more information. [ WARN] [1281370804.905061891]: MessageFilter [target=/odom ]: Dropped 100.00% of messages so far. Please turn the [ros.gmapping.message_notifier] rosconsole logger to DEBUG for more information. Any hint to fix this bug? thanks in advance, safdar -- View this message in context: http://ros-users.122217.n3.nabble.com/Grig-Map-using-Poineer-Robot-tp1015870p1058934.html Sent from the ROS-Users mailing list archive at Nabble.com. ------------------------------------------------------------------------------ This SF.net email is sponsored by Make an app they can't live without Enter the BlackBerry Developer Challenge http://p.sf.net/sfu/RIM-dev2dev _______________________________________________ ros-users mailing list ros-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ros-users