Crazyflie Brushless not able to fly although it is connected

[Saswati-Project]

Hi,
I have a Crazyflie 2.1 Brushless. I connected the Crazyflie to the Crazyradio 2.0 and CFclient. I also updated its firmware, but the command-based flight control panel in CFclient did not work.

I then tried to fly the drone using a Python script. In both cases, the Crazyflie connected successfully, which I confirmed by observing the LED, but it did not take off.

The Python script I used is as follows:

import logging
import time
import cflib.crtp
from cflib.crazyflie import Crazyflie
from cflib.crazyflie.syncCrazyflie import SyncCrazyflie
from cflib.positioning.motion_commander import MotionCommander
from cflib.utils import uri_helper


URI = uri_helper.uri_from_env(default='radio://0/100/2M/E7E7E7E7E7')


DEFAULT_HEIGHT = 0.1

logging.basicConfig(level=logging.ERROR)

def move_up(scf):
    with MotionCommander(scf, default_height=DEFAULT_HEIGHT) as mc:
        time.sleep(1)
        mc.up(0.1, velocity=0.01) 
        time.sleep(0.5)

if __name__ == '__main__':
    cflib.crtp.init_drivers()
    
    with SyncCrazyflie(URI, cf=Crazyflie(rw_cache='./cache')) as scf:
        print("Taking off!")
        move_up(scf)
        print("Landing!!")"

This script works well with the Crazyflie 2.1+, which is the other model I have, when I change the URI to match that model.

[ArisMorgens]

Hello @Saswati-Project!

The Crazyflie 2.1 Brushless needs to be armed before taking off, so that's the missing part in your script. You can add this right before taking off:

# Arm the Crazyflie
        scf.cf.supervisor.send_arming_request(True)
        time.sleep(1.0)

Let us know if this resolves the issue.

[Saswati-Project]

Thank you. It helps.