diff --git a/drone_scripts/start_height_sensor.sh b/drone_scripts/start_height_sensor.sh
index 8c02f0a9..bd78ada7 100755
--- a/drone_scripts/start_height_sensor.sh
+++ b/drone_scripts/start_height_sensor.sh
@@ -1,10 +1,7 @@
 #!/bin/bash
-
-. /home/ubuntu/source_ros2.sh
-
+. /home/ubuntu/source_ros2.sh # source ros2 installation
 SERIAL=$(cat /home/ubuntu/drone_conf/height.conf)
 echo "serial port is "$SERIAL
-echo ros2 run height height_reader --ros-args -p height_serial_port:=/dev/${SERIAL}
 ros2 run height height_reader --ros-args -p height_serial_port:=/dev/${SERIAL} | tee /home/ubuntu/drone_log/height.log
 
 
diff --git a/drone_scripts/start_lidar.sh b/drone_scripts/start_lidar.sh
index af29f65f..69368559 100755
--- a/drone_scripts/start_lidar.sh
+++ b/drone_scripts/start_lidar.sh
@@ -1,10 +1,7 @@
 #!/bin/bash
-
-. /home/ubuntu/source_ros2.sh
-
+. /home/ubuntu/source_ros2.sh # source ros2 installation
 SERIAL=$(cat /home/ubuntu/drone_conf/lidar.conf)
 echo "serial port is "$SERIAL
-echo ros2 run object_detection lidar_reader --ros-args -p lidar_serial_port:=/dev/${SERIAL}
 ros2 run object_detection lidar_reader --ros-args -p lidar_serial_port:=/dev/${SERIAL} | tee /home/ubuntu/drone_log/lidar.log
 
 
diff --git a/src/px4_msgs b/src/px4_msgs
index b64ef047..ffc3a4cd 160000
--- a/src/px4_msgs
+++ b/src/px4_msgs
@@ -1 +1 @@
-Subproject commit b64ef0475c1d44605688f4770899fe453d532be4
+Subproject commit ffc3a4cd578776213a444abe17d7eabf9621b266