# Cant use Mavsdk! please Help!

Source: https://forum.modalai.com/topic/4612/cant-use-mavsdk-please-help
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2025-07-18 01:45:37 UTC by Daniel Rincon
Replies: 5 · Views: 1063

## Daniel Rincon · 2025-07-18 01:45:37 UTC

when I use the mavsdk-docker example it just stays here:
voxl2:~$ docker run -it --rm --privileged --net=host --ipc=host voxl-mavsdk:v1.2
root@m0054:/home# ./voxl2_takeoff_land.py
Waiting for the drone to connect...
Drone connected!
Waiting for the drone to have a global position estimation....

it does nothing else, these are my configurations

{
	"config_file_version":	1,
	"en_localhost_mavlink_udp":	true,
	"localhost_udp_port_number":	14551,
	"en_vio":	true,
	"vio_pipe":	"qvio",
	"secondary_vio_pipe":	"ov",
	"vfc_vio_pipe":	"ov",
	"en_reset_vio_if_initialized_inverted":	true,
	"vio_warmup_s":	3,
	"send_odom_while_failed":	true,
	"horizon_cal_tolerance":	0.5,
	"en_hitl":	false,
	"offboard_mode":	"trajectory",
	"follow_tag_id":	0,

.....

i also made my own service that communicates with the docker-mavsdk to be able to send waypoints to the mapper (extend the plan to a point) and trigger commands to the tflite server between waypoints. but it does not work mainly because I have not been able to send instructions successfully to docker-mavsdk, from qgcontrol when I give arm I get this: MAV_CMD_COMPONENT_ARM_DISARM command temporarily rejected... this has me very blocked because I need to build this solution for a precision application.

please help!

## Reply by Eric Katzfey (ModalAI staff) · 2025-07-18 15:01:09 UTC

@Daniel-Rincon said in [Cant use Mavsdk\! please Help\!](/post/23196):
> Waiting for the drone to have a global position estimation....

Does your drone have GPS? Is the GPS getting a proper fix?

## Reply by Daniel Rincon · 2025-07-18 15:16:08 UTC (in reply to Eric Katzfey)

@Eric-Katzfey Hi Erick! thanks for answering, yes my drone has GPS, we bought the Starling 2 with the most powerful construction (MRB-D0014-4-C27-M0-T0-K3), anyway, our flights will be indoor, although the tests I'm doing them from my studio, that despite being in a building, should get gps, I say this because I compare it with a Mavic 2 that if you get GPS right here, in the plotter of the portal I see activity but strangely says gps: 0, do you require to show you something specifically?

Because this has stopped our development I was thinking about turning it around to Mavros, to see if I get a different result.

The Workflow I have proposed is:

voxl-mission-manager (our service) -> sends takeoff and puts the drone in hold state sends waypoints -> mapper extended to receive waypoints instead of a plan to a point -> runs mission -> in turn the manager monitors the mission and at certain waypoints activates and deactivates the tflite server -> when the mission ends it runs RTL from Mapper -> manager activates precise landing with Apriltags.

all this we want to do autonomously, from takeoff to landing, is it possible or too ambitious?
thanks for your answers!

## Reply by Eric Katzfey (ModalAI staff) · 2025-07-21 16:48:19 UTC (in reply to Daniel Rincon)

@Daniel-Rincon It seems like all that should be possible with MAVSDK. I asked about GPS because of the message MAVSDK gave you about waiting for a global position.

## Reply by Daniel Rincon · 2025-07-21 21:41:18 UTC (in reply to Eric Katzfey)

@Eric-Katzfey Hey Eric! I finally solved the problem by setting these variables:
RC=EXTERNAL in voxl-px4.conf 
and
px4-param set COM_RC_IN_MODE 0
px4-param set COM_RC_OVERRIDE 1
px4-param set COM_ARM_WO_GPS 1
px4-param set COM_RC_LOSS_T 30.0

This way I was able to make the takeoff autonomous, and also to have manual control for safety.

Now the problem I have is about the qvio, in several situations (most) ends up being very unstable, it makes erratic movements, like going much higher than the takeoff, as I see it seems something of decalibration, but how to standardize this to work well always, because the qvio so unstable is dangerous, what do you recommend me? or should I make a new thread for this question?
thanks in advance!

## Reply by Eric Katzfey (ModalAI staff) · 2025-07-21 23:11:46 UTC (in reply to Daniel Rincon)

@Daniel-Rincon Yes, please start a new post for the VIO question