Android / Rocon_app_manager pairing error

asked 2013-12-13 03:13:01 -0500

The Fonz
13 ●1 ●2 ●5

updated 2014-01-28 17:18:50 -0500

ngrennan
1 ●1 ●1

When trying to pair an Android device with the Rocon_app_manager as per [1], the 'Robot Remocon' Android app does find the robot when pressing 'Add a robot > Scan the local network', but when pressing 'select' it tries to connect but displays an error:

org.ros.exception.RosRuntimeException: timed out waiting for a gateway_info publication

I tried on different networks (university-wide and at home through a local router) and two different pc's and android devices. There is at least some communication as there's a different error when the rocon_app_platform hasn't been started on the pc.

I tried to look up where this error originates but I am quite hopeless. Does anyone have an idea of how to solve this?

[1] wiki.ros.org/rocon_app_manager/Tutorials/hydro/Pairing%20with%20Androids

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Any chance that some of the problems here are due to the fact that you are using android devices that have multiple interfaces? You can diagnose by checking rostopic list and rosservice list to see if the connections are there. rostopic info on an android topic will show strange ip's.

Daniel Stonier ( 2014-06-29 08:38:25 -0500 )edit

This error is quite vague sorry....we have simplified communications hugely getting ready for indigo with better error feedback (yet to be released though).

Daniel Stonier ( 2014-06-29 08:39:51 -0500 )edit

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answered 2013-12-16 14:54:49 -0500

Daniel Stonier
3145 ●24 ●51 ●64

I think probably your ROS_IP/ROS_HOSTNAME/ROS_MASTER_URI are not correctly set on the turtlebot for multi-device-pc communication. Some information on the roswiki and the turtlebot wiki.

The 'dumb' error message unfortunately is a late hydro regression I have yet to fix - it used to actually provide a hint to make sure you have your ROS_IP/ROS_HOSTNAME set.

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You're right - setting ROS_IP and ROS_HOSTNAME in .bashrc works, per the instructions in the turtlebot wiki. Still not very stable, sometimes it connects, sometimes on retry, sometimes on app restart.

The Fonz ( 2014-01-17 02:15:12 -0500 )edit

Still quite beta, occasionally state gets confused if something goes awry. We're working hard to upgrade/stabilise the android environment better for igloo.

Daniel Stonier ( 2014-01-19 00:50:20 -0500 )edit

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answered 2013-12-23 00:24:03 -0500

Johannes
75 ●8 ●10 ●17

updated 2014-01-06 23:08:55 -0500

Hello, somehow I do face the same problems. In some networks there is not a problem at all to connect with the android app to the master, but in others I get the error mentioned above. So fare I just could connect sucessfully when creating a network with my android phone where I connected the ROS master and the tablet I'm using. In all my test scenarios the ROS master had set the ROS_IP correct. I used our university WLAN (did not work) and a dedicated WLAN network with a private network (did also not work).

Is there any special need the network has to fullfill?

Best Wishes Johannes

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None that I can think of, but it may well be that we just haven't come across such a network. Logcats would be the next immediate step, but if they don't have enough information, it's down to debugging internals of rosjava.

Daniel Stonier ( 2014-01-14 00:02:50 -0500 )edit

Really need to identify what is different between the networks where you have success and where you didn't. I could perhaps reproduce the problem here then and debug.

Daniel Stonier ( 2014-01-14 00:03:11 -0500 )edit

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answered 2014-01-08 19:41:49 -0500

Unipower123
7 ●1

updated 2014-01-08 19:42:31 -0500

In Europe and America,Dhgate is very famous. So maybe you can look for the correct answer by Dhgate

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answered 2014-06-25 20:40:40 -0500

syaz nyp fyp

167 ●8 ●11 ●25

hi all. is there a follow up to this question? I'm encountering the same problem now. i did set my ROS_IP/ROS_HOSTNAME/ROS_MASTER_URI on the turtlebot for multi-device-pc communication, as what Daniel said. the remocon app did found my turtlebot under "scan local network" but it was unable to access it and it shows:

org.ros.exception.RosRuntimeException: timed out waiting for a gateway_info publication

any help will be greatly appreciated. thanks in advance guys.

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issue solved.

syaz nyp fyp ( 2014-07-10 00:21:59 -0500 )edit

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