Connection and takeoff error

[paulbaumgarten]

Hello Thank you for this amazing library. I have had this working successfully before but am having issues getting it to connect now. It's a new drone, using a new laptop (Windows 10) and a fresh install of Python (3.8.5) and library (whatever PyPi currently has).

I've reverted all the way to using code similar to the demo script

    tello = Tello()
    tello.connect()
    time.sleep(1)
    tello.takeoff()

The terminal output is as follows

tello.py - 186 - Send command: command
tello.py - 203 - Response command: ok
tello.py - 140 - invalid literal for int() with base 10: '-1,-1,-1'
tello.py - 141 - Response was is mid:-1;x:-100;y:-100;z:-100;mpry:-1,-1,-1;pitch:0;roll:0;yaw:0;vgx:0;vgy:0;vgz:0;templ:66;temph:68;tof:6553;h:0;bat:5;baro:118.26;time:0;agx:7.00;agy:0.00;agz:-997.00;

tello.py - 186 - Send command: takeoff
tello.py - 203 - Response takeoff: error
tello.py - 186 - Send command: takeoff
tello.py - 203 - Response takeoff: error
tello.py - 186 - Send command: takeoff
tello.py - 203 - Response takeoff: error
Traceback (most recent call last):
  File "c:/repos/tello-drone-experimenting/demo2-programmed-flight.py", line 44, in <module>
    demo()
  File "c:/repos/tello-drone-experimenting/demo2-programmed-flight.py", line 22, in demo
    tello.takeoff()
  File "c:\repos\tello-drone-experimenting\djitellopy\tello.py", line 334, in takeoff
    if self.send_control_command("takeoff", timeout=20):
  File "c:\repos\tello-drone-experimenting\djitellopy\decorators.py", line 35, in new_f
    return f(*args, **kwds)
  File "c:\repos\tello-drone-experimenting\djitellopy\tello.py", line 273, in send_control_command
    return self.return_error_on_send_command(command, response, self.enable_exceptions)
  File "c:\repos\tello-drone-experimenting\djitellopy\tello.py", line 315, in return_error_on_send_command
    raise Exception(msg)
Exception: Command takeoff was unsuccessful. Message: error

I notice that before the exception generated by the takeoff command, there is an "invalid literal" occurring on the connect command. Any advice on what I am missing would be much appreciated.

Regards

[M4GNV5]

Hey,

please install the latest djitellopy version using pip install https://github.com/damiafuentes/DJITelloPy/archive/master.zip. The version on PyPi is from 2018, currently only Damia Fuentes has access to the pypi package but he doesn't work much on djitellopy anymore.

Having takeoff return error is usually caused by a (nearly) empty battery pack. You can try:

tello = Tello()
tello.connect()
time.sleep(0.5)
print("Battery: ", telo.get_battery())
tello.takeoff()

[paulbaumgarten]

Thank you, that fixed it.