I am aware that it is a question which is coming back on a regular issue but I all the proposed answers without success so I am posting with the hope that I can get some answers.
My setup
PX4 1.13.2 running on a Pixhawk 6X Mini
The Pixhawk is connected to a Intel NUC through a USB-TTL P1202 Chip
The USB port assigned by Ubuntu is /dev/ttyUSB0
Ubuntu 20.04
When I check the frequency at which I received the imu/data, I can see that it is roughly 10Hz
fabrice@fabrice-NUC:~/Fast-Drone$ rostopic hz /mavros/imu/data
subscribed to [/mavros/imu/data]
average rate: 11.904
min: 0.080s max: 0.090s std dev: 0.00458s window: 12
average rate: 11.886
I checked /dev/ttyUSB0, looks fine
fabrice@fabrice-NUC:~/Fast-Drone$ stty -F /dev/ttyUSB0
speed 921600 baud; line = 0;
min = 1; time = 0;
-brkint -icrnl -imaxbel
-opost
-isig -icanon -iexten -echo
I tried to use the following command
rosrun mavros mavsys rate --all 50
But it did not change the rate
I used the trick to write on the SD (/etc/extras.txt ):
mavlink stream -d /dev/ttyUSB0 -s ATTITUDE_QUATERNION -r 100
mavlink stream -d /dev/ttyUSB0 -s HIGHRES_IMU -r 100
But it did not work either
On the other hand, I got an old Pixhawk 2 mini and I noticed that without doing nothing, I can get the IMU data at 50Hz, although I was not able to increase the rate as well…
After reading some articles I am wondering whether the last version of PX4 is intentionally limiting the frequency at 10Hz? And if so, is it possible to change it, i.e PX4 parameters becaus with Mavros I cannot do it so far?
Is it related to the USB port, I mean /dev/ttyACM0 is often mentioned as the referenced port?