Connecting from RPI to Ardupilot 2.8 at 115200 timeout

[BillyTziv]

Hey I am trying to connect to my Ardupilot 2.8 using a Raspberry Pi 3. I have already installed python 2.7.13. From the directory "/home/pi/dronekit-python/examples/vehicle_state" I am executing the only file there "vehicle_state.py".

It seems that It is not possible to connect. First of all I have gone through some issues and found many things. By executing the following command

python vehicle_state.py --connect '/dev/ttyACM0:115200'

it returns the following error

Connecting to vehicle on: /dev/ttyACM0:115200
Traceback (most recent call last):
  File "vehicle_state.py", line 40, in <module>
    vehicle = connect(connection_string, wait_ready=False)
  File "/usr/local/lib/python2.7/dist-packages/dronekit/__init__.py", line 2835, in connect
    handler = MAVConnection(ip, baud=baud, source_system=source_system, use_native=use_native)
  File "/usr/local/lib/python2.7/dist-packages/dronekit/mavlink.py", line 128, in __init__
    self.master = mavutil.mavlink_connection(ip, baud=baud, source_system=source_system)
  File "/usr/local/lib/python2.7/dist-packages/pymavlink/mavutil.py", line 1235, in mavlink_connection
    return mavudp(device, source_system=source_system, input=input, use_native=use_native)
  File "/usr/local/lib/python2.7/dist-packages/pymavlink/mavutil.py", line 875, in __init__
    self.port.bind((a[0], int(a[1])))
  File "/usr/lib/python2.7/socket.py", line 228, in meth
    return getattr(self._sock,name)(*args)
socket.gaierror: [Errno -2] Name or service not known

So I removed the baud rate and leave it to default hoping that this is the same. By executing

python vehicle_state.py --connect '/dev/ttyACM0'

it returns

Connecting to vehicle on: /dev/ttyACM0
Link timeout, no heartbeat in last 5 seconds

and I have tried to set the timeout=180 and timeout=300 but nothing worked. I have also tried this fix: link but it did not work either. So After 30 seconds or more depending on my timeout it drops out. It seems that it can not connect to the pilot. Any ideas how to fix this would be appreciated! Thanks.

[BillyTziv]

Trying to solve this issue with all my knowledge, I have moved to a new error

pi@raspberrypi:~/dronekit-python/examples/vehicle_state $ python vehicle_state.py --connect '/dev/ttyACM0'
Connecting to vehicle on: /dev/ttyACM0

Calibrating barometer
ArduCopter V3.2.1 (36b405fb)
Frame: QUAD
barometer calibration complete
GROUND START
Everything went OK!

Get all vehicle attribute values:
Autopilot Firmware version: APM:Copter-None.None.NoneUnknownReleaseType
Major version number: None
Minor version number: None
Patch version number: None
Release type: None
Release version: None
Stable release?: False
Autopilot capabilities
Traceback (most recent call last):
File "vehicle_state.py", line 57, in
print(" Supports MISSION_FLOAT message type: %s" % vehicle.capabilities.mission_float)
File "/usr/local/lib/python2.7/dist-packages/dronekit/init.py", line 1678, in capabilities
return Capabilities(self._capabilities)
File "/usr/local/lib/python2.7/dist-packages/dronekit/init.py", line 440, in init
self.mission_float = (((capabilities >> 0) & 1) == 1)
TypeError: unsupported operand type(s) for >>: 'NoneType' and 'int'

Hope this helps someone understand what is going on.

[ibrahimhaleemkhan]

Did you found out the solution?