simulator in hardware, new module added that allows to run a simulator in the hardware autopilot, for more documentation visit https://github.com/romain-chiap/PX4_SIH_QuadX

Signed-off-by: Roman <bapstroman@gmail.com>

Signed-off-by: Claudio Micheli <claudio@auterion.com>

This allows to perform pre-arm checks and prevent arming if obstacle avoidance is enabled but not yet running.
Added a print once flag to prevent excessive message spamming in QGC.

Signed-off-by: Claudio Micheli <claudio@auterion.com>

Signed-off-by: Roman <bapstroman@gmail.com>

Signed-off-by: Claudio Micheli <claudio@auterion.com>

Signed-off-by: Claudio Micheli <claudio@auterion.com>

Rename tune_control_s strength to volume to match Nuttx and Linux standard nomenclature for audio (loudness) control.

The previous code used the numeric baudrate as the speed argument
for cfsetispeed() and cfsetospeed(). This works in OSX and NuttX,
but is not portable.

This fix introduces a new method to convert baudrate to speed using
constants such as B115200.

Signed-off-by: Gabriel Moreno <gabrielm@cs.cmu.edu>

camera trigger and camera capture publish on two different topics and camera feedback module uses CAM_CAP_FBACK param to choose between the two.

camera_trigger.msg: add feedback field to understand if message camera from trigger or capture driver

    - gencpp in PX4/Firmware (ed8517a7d97f15cdf556cdc64496cc72bebb99ab): https://github.com/ros/gencpp/commit/b41ee3060badd660662e21cd9d4f81971c87a420
    - gencpp current upstream: https://github.com/ros/gencpp/commit/7e446a9976916a7b6fc7266098c67fc6f73a76e0
    - Changes: https://github.com/ros/gencpp/compare/b41ee3060badd660662e21cd9d4f81971c87a420...7e446a9976916a7b6fc7266098c67fc6f73a76e0

    7e446a9 2019-01-25 James Xu - enable Windows build (#38)

    - genmsg in PX4/Firmware (d4338773aa0139295caff03dc8275b44b88ccd04): https://github.com/ros/genmsg/commit/42e364661025b8f3d51486dc513d9e29cbd308da
    - genmsg current upstream: https://github.com/ros/genmsg/commit/5736b1f7ad037fb5811a3100ba9da2db0ec1f20a
    - Changes: https://github.com/ros/genmsg/compare/42e364661025b8f3d51486dc513d9e29cbd308da...5736b1f7ad037fb5811a3100ba9da2db0ec1f20a

    5736b1f 2019-01-28 Dirk Thomas - add missing run_depend on empy (#81)

Signed-off-by: CarlOlsson <carlolsson.co@gmail.com>

uorb_to_ros_msgs: delete all messages on the out dir first, so it can also consider message deletions on the input dir

 - <cinttypes> isn't available in the NuttX c++ library

- Use the values from landing_gear.msg