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I started to using the Dronekit, Dronekit-STIL and Mavlink to simulate my python scripts. Afters some days using it without problem I started to receive the error: WARNING:dronekit:Link timeout, no heartbeat in last 5 seconds.

I had tried to reinstall all the things but nothings works.

I had install the PIP pachages on Linux Ubutun 18. I had try the same packages on Ubutun 20 but I receive the same error.

I had install this packages: pymavlink>=2.3.3 MAVProxy-1.8.39 dronekit-2.9.2 dronekit-sitl-3.3.0 Python 2.7.17

Follow my steps to receive the error:

1 - dronekit-sitl copter --home=-25.56731,-42.61554,0,180

os: linux, apm: copter, release: stable SITL already Downloaded and Extracted. Ready to boot. Execute: /home/cesar/.dronekit/sitl/copter-3.3/apm --home=-23.56731,-46.61554,0,180 --model=quad -I 0 Started model quad at -23.56731,-46.61554,0,180 at speed 1.0 bind port 5760 for 0 Starting sketch 'ArduCopter' Serial port 0 on TCP port 5760 Starting SITL input Waiting for connection .... bind port 5762 for 2 Serial port 2 on TCP port 5762 bind port 5763 for 3 Serial port 3 on TCP port 5763

2 - mavproxy.py --master tcp:127.0.0.1:5760 --out udp:127.0.0.1:14551 --out udp:10.0.2.15:14550

Connect tcp:127.0.0.1:5760 source_system=255 Log Directory: Telemetry log: mav.tlog MAV> Waiting for heartbeat from tcp:127.0.0.1:5760 online system 1 STABILIZE> Mode STABILIZE AP: Calibrating barometer AP: Initialising APM... AP: barometer calibration complete AP: GROUND START Init Gyro** INS G_off: 0.00, 0.00, 0.00 A_off: 0.00, 0.00, 0.00 A_scale: 1.00, 1.00, 1.00

3 - python hello.py

Start simulator (SITL) Starting copter simulator (SITL) SITL already Downloaded and Extracted. Ready to boot. Connecting to vehicle on: tcp:127.0.0.1:5760 WARNING:dronekit:Link timeout, no heartbeat in last 5 seconds

after 30s

ERROR:dronekit.mavlink:Exception in MAVLink input loop Traceback (most recent call last): File "/usr/local/lib/python2.7/dist-packages/dronekit/mavlink.py", line 211, in mavlink_thread_in fn(self) File "/usr/local/lib/python2.7/dist-packages/dronekit/init.py", line 1371, in listener self._heartbeat_error) APIException: No heartbeat in 30 seconds, aborting. Traceback (most recent call last): File "hello.py", line 11, in vehicle = connect(connection_string, wait_ready=True) File "/usr/local/lib/python2.7/dist-packages/dronekit/init.py", line 3166, in connect vehicle.initialize(rate=rate, heartbeat_timeout=heartbeat_timeout) File "/usr/local/lib/python2.7/dist-packages/dronekit/init.py", line 2275, in initialize raise APIException('Timeout in initializing connection.') dronekit.APIException: Timeout in initializing connection.

Ce8
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1 Answers1

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Hard to say without knowing the content of hello.py.

Try connecting through udp:127.0.0.1:14551 in the hello.py script rather than tcp:127.0.0.1:5760.

Also, it looks like you're starting another SITL instance from your script, but again, hard to know without seeing the code.

Adrian
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