Dear people.
I do have:
pixhawk 4 mini.
Jetson TX2
Ubuntu 16.04 installed
Qground version v3.5.6
PX4 firmware 1.9.2 instaalled on QGCS
On the SDcard side under the /etc/extras.txt
mavlink stop-all
mavlink start -d /dev/ttyS1 -b 921600 -r 200 -m onboard
mavlink stream -d /dev/ttyS1 -s ATTITUDE -r 200
mavlink stream -d /dev/ttyS1 -s HIGHRES_IMU -r 300
mavlink stream -d /dev/ttyS1 -s ATTITUDE_QUATERNION -r 200
The mavors launch looks like this:
<arg name="fcu_url" default="/dev/ttyTHS1:921600"/>
<arg name="host_ip" default="host_IP" />
<include file="$(find mavros)/launch/node.launch">
<arg name="pluginlists_yaml" value="$(find mavros)/launch/px4_pluginlists.yaml" />
<arg name="config_yaml" value="$(find mavros)/launch/px4_config.yaml" />
<arg name="fcu_url" value="$(arg fcu_url)" />
<arg name="gcs_url" default="udp://@$(arg host_ip)" />
<arg name="tgt_system" value="$(arg tgt_system)" />
<arg name="tgt_component" value="$(arg tgt_component)" />
When I run the mavros launch file I get a message in QGCS
either
RC control lost
or
Data link lost
And sometimes both
And, then the return mode failsafe action is activate it, and the drone returns. In this time, the drone does not respond to the RC commands even the position flight mode is active.
I made a RC control test with the drone without propellers and moving the RC control closer and far away from the drone. I can see in the .log file a RC quality control 1-0 output. I do not know how to interpret it.
https://logs.px4.io/plot_app?log=bac6c579-0de5-4193-b0fc-6a557dd40771#Nav-RC-Quality
How can I solve this problem?