Drone is not taking off in guided mode

ArduCopter Copter 3.2
1

I am working in AC 3.2.1, and trying to use pymavlink library to send MAV command to the flight controller .

The apm is correctly listening to most of the command that include in
1)arm and disarm command
2)mode change command (guided,land)
3)streaming telemetry command

However ,apm fail to takeoff .

I tried to see on simulator using dronekit copter 3.2.1 and the takeoff commands works
I find an attachment which states that 3.2.1 can takeoff in guided mode

Screenshot_20191114-171514
Screenshot_20191114-171514.png720×1560 112 KB

Can anyone know it what is the issue. One more thing I am building the 3.2.1 apm code on arduino-ardpilot software and uploading it.

Thanks in advance
Samarth

2

Do you have GPS signal ? without it it will refuse to takeoff.

3

Yes
I kept it in guided mode and then arm the motors
My motor started to spin at a very low pwm level

The motor can only be armed when there is 3D fix so I don’t see it that there is gps problem
The telemetry data verifies me that it is in guided mode

Does 3.2.1 supports takeoff command in apm 2.8 , as takeoff command easily work in above AC 3.3 with pixhawk fight controller?

4

Hello
I have done some more testing regarding the same problem.

When I used dronekit , the drone in apm 3.2.1 was able to takeoff in guided mode.
But when directly using pymavlink , All command under guided mode did not work .

Can anyone tell what special is in dronekit platform as dronekit import pymavlink library and use the same command to takeoff which I am trying directly with pymavlink.

Thanking you
Samarth

5

Hi @samarth_kapila, I am facing the same issue as well. my motors started spinning upon arm but stopped the moment it stated takes off. Have you found the solution?

6

Hello brit000
My problem is solved when i set system ID and command ID to 1. One more thing, i was working on APM which is obsolete now. So the problem never occur to be in pixhawk and upper firmware version

7

Hi everyone, I started building an hexacopter (flame f550) using a raspberry 4 and the orange cube with optical flow and a leddar One. I have installed mavros. I’m trying to get the raspberry to communicate with the cube. I can see the topics and read what they publish. But I have these problems:

  1. At the beginning i couldn 't see the eco of the topics so i use this line “rosservice call /mavros/set_stream_rate 0 10 1”( is it correct?)
    but i can’t see the eco of local_position/pose. Do you know why or how i could solve this problem?
  2. my second problem is that the copter could not take off. I switched the mode in guided and arm the copter then I tried to publish a velocity with “mavros/setpoint_velocity/cmd_vel_unstamped” but the copter didn’t listen to me. So i tried to use “mavros/setpoint_position/local” but nothing. i think that for now i can’t use setpoint_position because i don’t have an echo from local position.
    My question is :
    what am I doing wrong?