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Hello,
I have set up a navigation stack on my PC and now I'm trying to run a slightly modified copy of android_teleop. Everything seems to work, but the android app does not receive any messages, although I can see them in rviz on the PC and I can see that the android node is connected to the correct topic using rqt_graph. The published topic (/virtual_joystick/cmd_vel) is working.
I am having the same problem! Did you find a solution. When I run the Teleop Hyrdo downloaded from Playstore ,it works fine with no problem. However, when I upload the android_tutorial_teleop to my android device, the robot is unresponsive. When I make rostopic info on the cmd_vel topic, I found the following
rostopic info virtual_joystick/cmd_vel Type: geometry_msgs/Twist Publishers: * /android/virtual_joystick ( http://192.168.1.2:46089/ ) Subscribers: None
There is no subsriber. However, when I run the Telop Hydro downloaded from PlayStore, it shows the following
rostopic info /turtlebot/application/android/virtual_joystick/cmd_vel Type: geometry_msgs/Twist Publishers: * /android/virtual_joystick ( http://192.168.1.2:37236/ ) Subscribers: * /mobile_base_nodelet_manager_turtlebot01_3181_5535754284978469755 ( http://192.168.1.9:52341/ )
The turtlebot is subscribed and responds to the command.
I really could find what is the issue with the code of the Tutorial found in android_core (hydro).
I hope to receive some help on this
A
Hi, I gave up with this problem a couple of months ago. After my research I suspect that the Android version I'm using is not working. I managed to run the teleop app on an emulator with older version of Android, Honeycomb as long as I remember. Anyway, your problem seems different than mine.
Asked: 2014-02-23 19:41:02 -0500
Seen: 1,036 times
Last updated: Dec 26 '14
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It's not the missing ROS_IP/ROS_HOSTNAME problem?
It's not that, because the application connects to the master and successfully sends messages to the cmd_vel topic. Also it looks like it is subscribed to the other topics, but it doesn't receive the messages, just like if they are not published. Is there a firewall on the android phone I need to disable?
Not that I know of, but I haven't done alot of testing on different devices to be sure. Do recheck the ROS_IP settings though, if I remember correctly, publishing can be ok, but subscribing will fail.
Sounds like a one-way route. Have you tested pinging from master to subscriber and vice versa? It mostly is a "route add -net 10.20.30.0 netmask 255.255.255.0 gateway 10.20.30.1" problem.