{"action":"created","issue":{"url":"https://api.github.com/repos/mavlink/mavros/issues/346","labels_url":"https://api.github.com/repos/mavlink/mavros/issues/346/labels{/name}","comments_url":"https://api.github.com/repos/mavlink/mavros/issues/346/comments","events_url":"https://api.github.com/repos/mavlink/mavros/issues/346/events","html_url":"https://github.com/mavlink/mavros/issues/346","id":96363070,"number":346,"title":"Error while launching and no Heartbeat.","user":{"login":"rs1990","id":5892630,"avatar_url":"https://avatars.githubusercontent.com/u/5892630?v=3","gravatar_id":"","url":"https://api.github.com/users/rs1990","html_url":"https://github.com/rs1990","followers_url":"https://api.github.com/users/rs1990/followers","following_url":"https://api.github.com/users/rs1990/following{/other_user}","gists_url":"https://api.github.com/users/rs1990/gists{/gist_id}","starred_url":"https://api.github.com/users/rs1990/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rs1990/subscriptions","organizations_url":"https://api.github.com/users/rs1990/orgs","repos_url":"https://api.github.com/users/rs1990/repos","events_url":"https://api.github.com/users/rs1990/events{/privacy}","received_events_url":"https://api.github.com/users/rs1990/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/mavlink/mavros/labels/question","name":"question","color":"cc317c"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2015-07-21T16:42:01Z","updated_at":"2015-07-22T09:22:41Z","closed_at":null,"body":"Hello ,\r\n\r\nI have been trying to get my x8 octocopter with the pixhawk flying for quite a while but i cannot seem to connect to it ever. \r\nAny help. I just cant seem to figure out anything . its quite confusing . I have connected my odroid U3 running ubuntu 14.04 and the TELEM2 port of the the pixhawk via the USB to serial converter   like so: \r\n![image](https://cloud.githubusercontent.com/assets/5892630/8806617/323f8a96-2f9d-11e5-9b03-d4969951ed3a.png)\r\n\r\nWhenever i run \"roslaunch mavros px4.launch\"i have tried different baudrates as well. Could you tell me the correct baudrate for this type of connection?\r\n \r\ni get the following error:\r\n\r\n``` \r\nodroid@bat:~$ roslaunch mavros px4.launch \r\n... logging to /home/odroid/.ros/log/ef922eba-2fc4-11e5-a620-74da38065ef3/roslaunch-bat-1960.log\r\nChecking log directory for disk usage. This may take awhile.\r\nPress Ctrl-C to interrupt\r\nDone checking log file disk usage. Usage is <1GB.\r\n\r\nstarted roslaunch server http://bat:49969/\r\n\r\nSUMMARY\r\n========\r\n\r\nCLEAR PARAMETERS\r\n * /mavros/\r\n\r\nPARAMETERS\r\n * /mavros/cmd/use_comp_id_system_control: False\r\n * /mavros/conn/heartbeat_rate: 1.0\r\n * /mavros/conn/system_time_rate: 1.0\r\n * /mavros/conn/timeout: 10.0\r\n * /mavros/conn/timesync_rate: 10.0\r\n * /mavros/distance_sensor/hrlv_ez4_pub/field_of_view: 0.0\r\n * /mavros/distance_sensor/hrlv_ez4_pub/frame_id: hrlv_ez4_sonar\r\n * /mavros/distance_sensor/hrlv_ez4_pub/id: 0\r\n * /mavros/distance_sensor/hrlv_ez4_pub/orientation: 8\r\n * /mavros/distance_sensor/hrlv_ez4_pub/send_tf: True\r\n * /mavros/distance_sensor/hrlv_ez4_pub/sensor_position/x: 0.0\r\n * /mavros/distance_sensor/hrlv_ez4_pub/sensor_position/y: 0.0\r\n * /mavros/distance_sensor/hrlv_ez4_pub/sensor_position/z: -0.1\r\n * /mavros/distance_sensor/laser_1_sub/id: 3\r\n * /mavros/distance_sensor/laser_1_sub/orientation: 8\r\n * /mavros/distance_sensor/laser_1_sub/subscriber: True\r\n * /mavros/distance_sensor/lidarlite_pub/field_of_view: 0.0\r\n * /mavros/distance_sensor/lidarlite_pub/frame_id: lidarlite_laser\r\n * /mavros/distance_sensor/lidarlite_pub/id: 1\r\n * /mavros/distance_sensor/lidarlite_pub/orientation: 8\r\n * /mavros/distance_sensor/lidarlite_pub/send_tf: True\r\n * /mavros/distance_sensor/lidarlite_pub/sensor_position/x: 0.0\r\n * /mavros/distance_sensor/lidarlite_pub/sensor_position/y: 0.0\r\n * /mavros/distance_sensor/lidarlite_pub/sensor_position/z: -0.1\r\n * /mavros/distance_sensor/sonar_1_sub/id: 2\r\n * /mavros/distance_sensor/sonar_1_sub/orientation: 8\r\n * /mavros/distance_sensor/sonar_1_sub/subscriber: True\r\n * /mavros/fcu_url: /dev/ttyUSB0:921600\r\n * /mavros/gcs_url: \r\n * /mavros/global_position/frame_id: fcu\r\n * /mavros/global_position/rot_covariance: 99999.0\r\n * /mavros/global_position/tf/child_frame_id: fcu_utm\r\n * /mavros/global_position/tf/frame_id: local_origin\r\n * /mavros/global_position/tf/send: False\r\n * /mavros/image/frame_id: px4flow\r\n * /mavros/imu/angular_velocity_stdev: 0.000349065850399\r\n * /mavros/imu/frame_id: fcu\r\n * /mavros/imu/linear_acceleration_stdev: 0.0003\r\n * /mavros/imu/magnetic_stdev: 0.0\r\n * /mavros/imu/orientation_stdev: 1.0\r\n * /mavros/local_position/frame_id: fcu\r\n * /mavros/local_position/tf/child_frame_id: fcu\r\n * /mavros/local_position/tf/frame_id: local_origin\r\n * /mavros/local_position/tf/send: False\r\n * /mavros/mission/pull_after_gcs: True\r\n * /mavros/mocap/use_pose: True\r\n * /mavros/mocap/use_tf: False\r\n * /mavros/plugin_blacklist: ['safety_area', '...\r\n * /mavros/plugin_whitelist: []\r\n * /mavros/px4flow/frame_id: px4flow\r\n * /mavros/px4flow/ranger_fov: 0.0\r\n * /mavros/px4flow/ranger_max_range: 5.0\r\n * /mavros/px4flow/ranger_min_range: 0.3\r\n * /mavros/safety_area/p1/x: 1.0\r\n * /mavros/safety_area/p1/y: 1.0\r\n * /mavros/safety_area/p1/z: 1.0\r\n * /mavros/safety_area/p2/x: -1.0\r\n * /mavros/safety_area/p2/y: -1.0\r\n * /mavros/safety_area/p2/z: -1.0\r\n * /mavros/setpoint_accel/send_force: False\r\n * /mavros/setpoint_attitude/reverse_throttle: False\r\n * /mavros/setpoint_attitude/tf/child_frame_id: attitude\r\n * /mavros/setpoint_attitude/tf/frame_id: local_origin\r\n * /mavros/setpoint_attitude/tf/listen: False\r\n * /mavros/setpoint_attitude/tf/rate_limit: 10.0\r\n * /mavros/setpoint_position/tf/child_frame_id: setpoint\r\n * /mavros/setpoint_position/tf/frame_id: local_origin\r\n * /mavros/setpoint_position/tf/listen: False\r\n * /mavros/setpoint_position/tf/rate_limit: 50.0\r\n * /mavros/startup_px4_usb_quirk: True\r\n * /mavros/sys/disable_diag: False\r\n * /mavros/sys/min_voltage: 10.0\r\n * /mavros/target_component_id: 1\r\n * /mavros/target_system_id: 1\r\n * /mavros/tdr_radio/low_rssi: 40\r\n * /mavros/time/time_ref_source: fcu\r\n * /mavros/time/timesync_avg_alpha: 0.6\r\n * /mavros/vibration/frame_id: vibration\r\n * /mavros/vision_pose/tf/child_frame_id: vision\r\n * /mavros/vision_pose/tf/frame_id: local_origin\r\n * /mavros/vision_pose/tf/listen: False\r\n * /mavros/vision_pose/tf/rate_limit: 10.0\r\n * /mavros/vision_speed/listen_twist: False\r\n * /rosdistro: indigo\r\n * /rosversion: 1.11.13\r\n\r\nNODES\r\n  /\r\n    mavros (mavros/mavros_node)\r\n\r\nauto-starting new master\r\nprocess[master]: started with pid [1971]\r\nROS_MASTER_URI=http://localhost:11311\r\n\r\nsetting /run_id to ef922eba-2fc4-11e5-a620-74da38065ef3\r\nprocess[rosout-1]: started with pid [1984]\r\nstarted core service [/rosout]\r\nprocess[mavros-2]: started with pid [1988]\r\n[ INFO] [1437495861.007422791]: FCU URL: /dev/ttyUSB0:921600\r\n[ INFO] [1437495861.014099760]: serial0: device: /dev/ttyUSB0 @ 921600 bps\r\n[ INFO] [1437495861.017697911]: GCS bridge disabled\r\n[ INFO] [1437495861.550304048]: Plugin 3dr_radio loaded and initialized\r\n[ INFO] [1437495861.564767524]: Plugin actuator_control loaded and initialized\r\n[ INFO] [1437495861.592204523]: Plugin command loaded and initialized\r\n[ INFO] [1437495861.592773603]: Plugin distance_sensor blacklisted\r\n[ INFO] [1437495861.632774170]: Plugin ftp loaded and initialized\r\n[ INFO] [1437495861.674008189]: Plugin global_position loaded and initialized\r\n[ INFO] [1437495861.674707061]: Plugin image_pub blacklisted\r\n[ INFO] [1437495861.709403193]: Plugin imu_pub loaded and initialized\r\n[ INFO] [1437495861.727033362]: Plugin local_position loaded and initialized\r\n[ INFO] [1437495862.631232919]: Plugin mocap_pose_estimate loaded and initialized\r\n[ INFO] [1437495862.646063976]: Plugin param loaded and initialized\r\n[ INFO] [1437495862.673441433]: Plugin px4flow loaded and initialized\r\n[ INFO] [1437495862.691940098]: Plugin rc_io loaded and initialized\r\n[ INFO] [1437495862.692543179]: Plugin safety_area blacklisted\r\n[ INFO] [1437495862.712904169]: Plugin setpoint_accel loaded and initialized\r\n[ INFO] [1437495862.768918787]: Plugin setpoint_attitude loaded and initialized\r\n[ INFO] [1437495862.796322952]: Plugin setpoint_position loaded and initialized\r\n[ INFO] [1437495862.811329175]: Plugin setpoint_velocity loaded and initialized\r\n[ INFO] [1437495862.841003997]: Plugin sys_status loaded and initialized\r\n[ INFO] [1437495862.856489051]: Plugin sys_time loaded and initialized\r\n[ INFO] [1437495862.863996767]: Plugin vfr_hud loaded and initialized\r\n[ INFO] [1437495862.864775471]: Plugin vibration blacklisted\r\n[ INFO] [1437495862.894723542]: Plugin vision_pose_estimate loaded and initialized\r\n[ INFO] [1437495862.912610002]: Plugin vision_speed_estimate loaded and initialized\r\n[ INFO] [1437495862.939421545]: Plugin waypoint loaded and initialized\r\n[ INFO] [1437495862.940119167]: Autostarting mavlink via USB on PX4\r\n[ INFO] [1437495862.940525874]: Built-in mavlink dialect: ardupilotmega\r\n[ INFO] [1437495862.940675373]: MAVROS started. MY ID [1, 240], TARGET ID [1, 1]\r\n```"},"comment":{"url":"https://api.github.com/repos/mavlink/mavros/issues/comments/123636473","html_url":"https://github.com/mavlink/mavros/issues/346#issuecomment-123636473","issue_url":"https://api.github.com/repos/mavlink/mavros/issues/346","id":123636473,"user":{"login":"vooon","id":1023568,"avatar_url":"https://avatars.githubusercontent.com/u/1023568?v=3","gravatar_id":"","url":"https://api.github.com/users/vooon","html_url":"https://github.com/vooon","followers_url":"https://api.github.com/users/vooon/followers","following_url":"https://api.github.com/users/vooon/following{/other_user}","gists_url":"https://api.github.com/users/vooon/gists{/gist_id}","starred_url":"https://api.github.com/users/vooon/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/vooon/subscriptions","organizations_url":"https://api.github.com/users/vooon/orgs","repos_url":"https://api.github.com/users/vooon/repos","events_url":"https://api.github.com/users/vooon/events{/privacy}","received_events_url":"https://api.github.com/users/vooon/received_events","type":"User","site_admin":false},"created_at":"2015-07-22T09:22:41Z","updated_at":"2015-07-22T09:22:41Z","body":"Maybe better to use latest stable (it is default option in QGC).\r\nThen perhaps you don't configured SYS_COMPANION."}}