Hi while i was installing rosserial library for arduino in ubuntu 16.04 using command "sudo apt-get install ros-indigo-rosserial-arduino" but its coming unable to locate package,how should i resolve it

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Try this "sudo apt-get install ros-kinetic-rosserial-arduino" or "sudo apt-get install ros-jade-rosserial-arduino".(This might be helpful cuz Ubuntu 16.04 supports kinetic officially but you can also build the packages separately which is not recommended). (Download the source from git hub: https://github.com/ros-drivers/rosserial and copy it in your local catkin_ws and run catkin_make. Not a recommended solution but for a workaround.)

I have tried "sudo apt-get install ros-indigo-rosserial-arduino" in Ubuntu 14.04. It is working fine.

you can also change the rosdistro to ros-jade i guess.