Omarzamany's profile - activity

Hello, I'm using ROS indigo to fly my Erle Copter, I want to ask you about ROS nodes,

I have several ROS nodes: one of these nodes will take reading from one of the sensor and do some calculations, and based on the sensor readings the Copter (UAV) will know its direction.

My question is, if I want to run the ROS node that is responsible of sensor readings after reaching one of the waypoints, how can I call that ROS node so it works only once the UAV reaches the waypoint and move? and then move to the second waypoint and run the same node again

so recalling ROS node at specific time, can it be achieved and how?

I hope that you can understand my question since I didn't find what I want in the tutorial, all what I found is how to publish and subscribe in another one, but its not explained how to run a ROS nodes inside another ROS node (main one)

No, I want you to tell ME what to look at and what concepts should I use in ROS in order to start

hello, I saw the tutorial but I didn't find what I want, I want to move the drone based on sensor readings : IR receiver, if the signal is coming from the right the UAV should turn right and search, if the signal is coming from the front the UAV should continue straight and so on

Hello, so I have a UAV supported with ErleBrain 2.0 and I want to detect and track the IR signal:

There will be an IR transmitters in the ground (transmits the signal everywhere) , and the UAV will have 4 IR receivers (one receiver in each side)

What I want to do is: I'll first analyse the signal of the 4 IR receivers ( in the UAV) and the based on the signal , say for example if the right receiver received stronger signal so based on this, the UAV should turn right and check the reading again.

My question is where to start?? if I want to move the UAV based on the IR receivers readings autonomously ?? do you have an open source or package on ROS, is there are any documents that I can read. I just have a problem with the start point, once I have a clue then I can work :)

Thank you

Hello, So I'm planning to fly ErleCopter UAV in indoor environment there are two main things that I have to do: 1- takeoff and land Autonomously ( I already done that with ROS node ) 2- fly the UAV in a path inside a room ( I have to load the map of the room and fly the UAV in a predefined path) I'll just let the UAV fly in the room and collect some data using external sensors.

My questions is: from where can I start, if I want to load the map in Gazebo and fly the UAV in a predefined path using ROS
Im using ROS indigo and Gazebo 4 simulator.

so i have this c++ code https://github.com/erlerobot/ros_erle...

and I want to run+test it on Gazebo simulator, any idea how can I do this I have ROS indigo installed in my laptop and Gazebo 4 all under ubuntu 14.04. I'm a beginner so if can provide me with the steps that will be great :)

Thank you

I need an answer plz !

NO ONE LOOKED AT IT ??

Hi, i followed exactly the instructions here http://erlerobotics.com/docs/Simulati... , everything went find except the very last command :::

Then compile everything together:

cd ~/simulation/ros_catkin_ws    
source devel/setup.bash  catkin_make

Error in the terminal :

[ 98%] Building CXX object ardupilot_sitl_gazebo_plugin/ardupilot_sitl_gazebo_plugin/CMakeFiles/ardupilot_sitl_gazebo_plugin.dir/src/SocketAPM.cpp.o
Linking CXX shared library /home/omaralhebsi/simulation/ros_catkin_ws/devel/lib/libardupilot_sitl_gazebo_plugin.so
[ 98%] Built target ardupilot_sitl_gazebo_plugin
make: *** [all] Error 2
Invoking "make -j2 -l2" failed

What do i have to do ?? , plz help its only one step and then i can start working on Gazebo. I guess the problem is with catkin_make

i ran the code again and this is what i received :

 [100%] Built target sitl_test_node
/home/simulation/ros_catkin_ws/src/gazebo_cpp_examples/erle-copter_pattern_follower/src/image_subscriber.cpp:5:25: fatal error: aruco/aruco.h: No such file or directory
 #include <aruco/aruco.h>
                         ^
compilation terminated.
make[2]: *** [gazebo_cpp_examples/erle-copter_pattern_follower/CMakeFiles/ros_erle_pattern_follower.dir/src/image_subscriber.cpp.o] Error 1
make[1]: *** [gazebo_cpp_examples/erle-copter_pattern_follower/CMakeFiles/ros_erle_pattern_follower.dir/all] Error 2
make: *** [all] Error 2
Invoking "make -j2 -l2" failed

it asks me to enter the password and then the terminal allows me to enter a new line immediately

when i tried to remove it , i recived this message : sudo rm /etc/apt/sources.list.d/ros-latest.listsudo rm: cannot remove ‘/etc/apt/sources.list.d/ros-latest.listsudo’: No such file or directory

again , nothing happened when i executed the deb packages , dont know why

I tried to download ROS indigo more than 3 times and I always receive the same error in the end of the installation : i followed the instructions here:

http://wiki.ros.org/indigo/Installati...

my laptop is 14.04 LTS

N: Ignoring file 'ros-latest.listsudo' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension

N: Ignoring file 'ros-latest.listsudo' in directory '/etc/apt/sources.list.d/' as it has an invalid filename extension

what is the solution ??