Rosserial nodes not starting after last update

asked 2018-05-30 22:54:36 -0500

Cerin gravatar image

I just ran a ROS package update on my Ubuntu 16.04 system, and now none of my rosserial instances are starting.

My launch file is like:

    <group ns="torso_arduino">
        <node pkg="rosserial_arduino" type="" name="serial_node" output="screen">
            <param name="~port" command="/dev/ttyACM0" />
            <param name="~baud" value="115200" />

but running this now results in:

[rospy.client][INFO] '2018-05-30 23:43:20': init_node, name[/torso_arduino/serial_node], pid[1195]
[xmlrpc][INFO] '2018-05-30 23:43:20': XML-RPC server binding to
[xmlrpc][INFO] '2018-05-30 23:43:20': Started XML-RPC server [http://robot:33755/]
[rospy.impl.masterslave][INFO] '2018-05-30 23:43:20': _ready: http://robot:33755/
[xmlrpc][INFO] '2018-05-30 23:43:20': xml rpc node: starting XML-RPC server
[rospy.registration][INFO] '2018-05-30 23:43:20': Registering with master node http://localhost:11311
[rospy.init][INFO] '2018-05-30 23:43:20': ROS Slave URI: [http://robot:33755/]
[rospy.init][INFO] '2018-05-30 23:43:20': registered with master
[rospy.rosout][INFO] '2018-05-30 23:43:20': initializing /rosout core topic
[rospy.rosout][INFO] '2018-05-30 23:43:20': connected to core topic /rosout
[rospy.simtime][INFO] '2018-05-30 23:43:20': /use_sim_time is not set, will not subscribe to simulated time [/clock] topic
[rosout][INFO] '2018-05-30 23:43:20': ROS Serial Python Node
[rospy.internal][INFO] '2018-05-30 23:43:20': topic[/rosout] adding connection to [/rosout], count 0
[rosout][INFO] '2018-05-30 23:43:20': Connecting to /dev/ttyACM0 at 115200 baud
[rospy.core][INFO] '2018-05-30 23:43:20': signal_shutdown [atexit]
[rospy.internal][INFO] '2018-05-30 23:43:20': topic[/rosout] removing connection to /rosout
[rospy.impl.masterslave][INFO] '2018-05-30 23:43:20': atexit

How do I read this? It's not producing any error log messages, but it seems to be saying it's getting a signal to exit, but it's unclear where.

What's changed and how do I fix this? Is it normal for such a massive backward-compatible change been made to an LTS release?

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Looking in this log isn't too useful imo. I'd start your launch file with --screen and then see what the output on the console is. Also start your rosserial_arduino node stand-alone and see whether the output changes.

gvdhoorn gravatar imagegvdhoorn ( 2018-05-31 01:37:41 -0500 )edit

Is it normal for such a massive backward-compatible change been made to an LTS release?

we don't even know whether some "massive backward-compatible change" (I guess that should read "incompatible") has been introduced, so let's not jump to conclusions.

gvdhoorn gravatar imagegvdhoorn ( 2018-05-31 01:38:25 -0500 )edit