How to connect MAVSDK with PixHawk 4 instead of Gazebo/Jmavsim simulator?

[MuhammadBilal1]

@julianoes @JonasVautherin I setup the environment as you mentioned in the below guide of your's. And it worked absolutely fine. I ran the example you provided here. Example also ran successfully.

Getting started with MAVSDK – Python

Now my problem is working with actual PixHawk. After finishing the example and simulator work, I closed everything, rebooted my Ubuntu 18.04 machine. Open the terminal window, connected my PixHawk 4 (PX4 is installed over it previously via QGroundControl, PixHawk is connected with system via USB cable) and ran the example (takeoff_and_land.py) but its stuck at Waiting for drone to connect... not going beyond this. Please see attached image below.

I am running Ubuntu 18.04 over a VM Virtual Machine. I don't know much about the UDP and the Serial Ports things. I read about them here.

[JonasVautherin]

You are doing await drone.connect(system_address="udp://:14540"), and therefore mavsdk_server waits for UDP packets coming on port 14540. Though your pixhawk is connected over serial over USB.

$ dmesg should show you the name of the device when you plug the pixhawk in. For me I usually get it under /dev/ttyACM0 or /dev/ttyACM1. And I connect to it with e.g.:

await drone.connect(system_address="serial:///dev/ttyACM0")

I hope this helps!

[MuhammadBilal1]

@JonasVautherin : Your suggestion worked. Thanks.

[Mumtazeagle]

!/usr/bin/env python3

import asyncio from mavsdk import System

async def run():

drone = System()
# await drone.connect(system_address="serial:dev/ttyACM0")
await drone.connect(system_address="serial:///dev/ttyACM0")
print("Connected to MAVSDK")

# drone = System(mavsdk_server_address='localhost', port=50051)

status_text_task = asyncio.ensure_future(print_status_text(drone))

print("Waiting for drone to connect...")
async for state in drone.core.connection_state():
    if state.is_connected:
        print(f"-- Connected to drone!")
        break

print("Waiting for drone to have a global position estimate...")
async for health in drone.telemetry.health():
    if health.is_global_position_ok and health.is_home_position_ok:
        print("-- Global position estimate OK")
        break

print("-- Arming")
await drone.action.arm()

print("-- Taking off")
await drone.action.takeoff()

await asyncio.sleep(10)

print("-- Landing")
await drone.action.land()

status_text_task.cancel()

async def print_status_text(drone): try: async for status_text in drone.telemetry.status_text(): print(f"Status: {status_text.type}: {status_text.text}") except asyncio.CancelledError: return

if name == "main":

Run the asyncio loop

asyncio.run(run())

I wanted to cnnect my pixhawk to this python SDK script but it is not working

[julianoes]

@Mumtazeagle please don't necrobump. Open a new issue and give all required information. And check out http://mavsdk-python-docs.s3-website.eu-central-1.amazonaws.com/index.html#debug-connection-issues.