'error Not joystick' when calling any commands (Tello with Python using DjiTelloPy)

pzmn · Oct 29, 2020

Hello fellow pilots,

I want to program some AI software on my Tello, but even simple commands doesn't seem to work. I'm using DjiTelloPy package on Python 3.7.

Using example code:

Python:

from djitellopy import Tello

tello = Tello()

tello.connect()
tello.takeoff()

tello.move_left(100)
tello.rotate_counter_clockwise(90)
tello.move_forward(100)

tello.land()

That's my output:

Code:

Send command: command
Response: b'ok'
Send command: takeoff
Timeout exceed on command takeoff
Command takeoff was unsuccessful. Message: False
Send command: left 100
Timeout exceed on command left 100
Command left 100 was unsuccessful. Message: False
Send command: ccw 90
Response: b'error Not joystick'
Command ccw 90 was unsuccessful. Message: error Not joystick
Send command: forward 100
Response: b'ok'
Send command: land
Response: b'error Auto land'
Command land was unsuccessful. Message: error Auto land

I've tested the connection from two computers and both fail to control the drone. Flying with Tello App works fine, though. Any advice how to resolve this?

agraham · Oct 30, 2020

I have never tried it but don't you have to wait between commands so the previous one finishes before the next one can be accepted? Isn't there some kind of command complete response from the Tello?

Daniel_Roxl · Dec 24, 2020

pzmn said:
Hello fellow pilots,

I want to program some AI software on my Tello, but even simple commands doesn't seem to work. I'm using DjiTelloPy package on Python 3.7.

Using example code:

Python:

from djitellopy import Tello tello = Tello() tello.connect() tello.takeoff() tello.move_left(100) tello.rotate_counter_clockwise(90) tello.move_forward(100) tello.land()

That's my output:

Code:

Send command: command Response: b'ok' Send command: takeoff Timeout exceed on command takeoff Command takeoff was unsuccessful. Message: False Send command: left 100 Timeout exceed on command left 100 Command left 100 was unsuccessful. Message: False Send command: ccw 90 Response: b'error Not joystick' Command ccw 90 was unsuccessful. Message: error Not joystick Send command: forward 100 Response: b'ok' Send command: land Response: b'error Auto land' Command land was unsuccessful. Message: error Auto land

I've tested the connection from two computers and both fail to control the drone. Flying with Tello App works fine, though. Any advice how to resolve this?

I am testing library

pzmn said:
Hello fellow pilots,

I want to program some AI software on my Tello, but even simple commands doesn't seem to work. I'm using DjiTelloPy package on Python 3.7.

Using example code:

Python:

from djitellopy import Tello tello = Tello() tello.connect() tello.takeoff() tello.move_left(100) tello.rotate_counter_clockwise(90) tello.move_forward(100) tello.land()

That's my output:

Code:

Send command: command Response: b'ok' Send command: takeoff Timeout exceed on command takeoff Command takeoff was unsuccessful. Message: False Send command: left 100 Timeout exceed on command left 100 Command left 100 was unsuccessful. Message: False Send command: ccw 90 Response: b'error Not joystick' Command ccw 90 was unsuccessful. Message: error Not joystick Send command: forward 100 Response: b'ok' Send command: land Response: b'error Auto land' Command land was unsuccessful. Message: error Auto land

I've tested the connection from two computers and both fail to control the drone. Flying with Tello App works fine, though. Any advice how to resolve tIhis?

I am testing djitellopy on python 3.7using WingIde personal and this problem was solved using a time.sleep (any_seconds) in this way:
from djitellopy import Tello
import time

t = Tello()
t.connect()
time.sleep(3)

t.takeoff()
time.sleep(3)

t.land()
time.sleep(3)

It works but this anoying message still appears:
Send command: command
Response: b'ok'
Send command: takeoff
Timeout exceed on command takeoff
Command takeoff was unsuccessful. Message: False
Send command: land
Timeout exceed on command land
Command land was unsuccessful. Message: False

I will try changing time values.

Rom13IL · Jan 9, 2021

Did you find a way to override this problem? If I you want to program an A.I for flying the drone I can't wait more than 1 second for everytime i want to send a command. After all, in the phone app we can move forward and look to the right but if we program the drone we can only do one at a time because of the not joystick...

Did anyone find a way to override it?

kurnis · Feb 7, 2021

I had the same problems. I solved it reseting the drone:

Long press Tello for 5 seconds while Tello is on, and the indicator light will turn off and then flash yellow. When the indicator light shows a flashing yellow light, the Wi-Fi SSID and password will be reset to the factory settings, and there is no password by default.

tesla · May 17, 2021

pzmn said:
Hello fellow pilots,

I want to program some AI software on my Tello, but even simple commands doesn't seem to work. I'm using DjiTelloPy package on Python 3.7.

Using example code:

Python:

from djitellopy import Tello tello = Tello() tello.connect() tello.takeoff() tello.move_left(100) tello.rotate_counter_clockwise(90) tello.move_forward(100) tello.land()

That's my output:

Code:

Send command: command Response: b'ok' Send command: takeoff Timeout exceed on command takeoff Command takeoff was unsuccessful. Message: False Send command: left 100 Timeout exceed on command left 100 Command left 100 was unsuccessful. Message: False Send command: ccw 90 Response: b'error Not joystick' Command ccw 90 was unsuccessful. Message: error Not joystick Send command: forward 100 Response: b'ok' Send command: land Response: b'error Auto land' Command land was unsuccessful. Message: error Auto land

I've tested the connection from two computers and both fail to control the drone. Flying with Tello App works fine, though. Any advice how to resolve this?

Hi , i have the same problem can you tell me how you solved it ?? please

Zar · May 17, 2021

hi, I am having an error in python code in video capturing. Anyone who can help. The tello light turns green but it does not show anything on screen.
OpenCV(4.5.2) C:\Users\runneradmin\AppData\Local\Temp\pip-req-build-1bq9o88m\opencv\modules\imgproc\src\resize.cpp:4051: error: (-215:Assertion failed) !ssize.empty() in function 'cv::resize'

marsar24 · May 18, 2021

Zar said:
hi, I am having an error in python code in video capturing. Anyone who can help. The tello light turns green but it does not show anything on screen.
OpenCV(4.5.2) C:\Users\runneradmin\AppData\Local\Temp\pip-req-build-1bq9o88m\opencv\modules\imgproc\src\resize.cpp:4051: error: (-215:Assertion failed) !ssize.empty() in function 'cv::resize'

Hey Zar, the error that you see is because of an empty frame. Most probably because of the way you are reading tello's frame.

To read tello's frame:

tello = Tello()
while True:
frameObject = tello.get_frame_read()
cv2.imshow("preview", frameObject.frame)
cv2.waitKey(1)

If you need any help, you can checkout my ongoing hobby project : MithilanchalRobotics/All_Things_Tello

Also, after connecting to the Tello wifi, in my tello edu it turns solid pink, slow flashing pink and then fast flashing pink. Not sure if light signals are same in EDU version.

martinpi · May 23, 2021

look here:

"error Not Joystick" from Tello API

I've been playing around with the Tello API, based on the official Ryze documentation and implemented by the python library microlinux/tello. I record the Tello responses after I send it Control commands. The documentation specifies only "OK" or "error" as possible responses. I sent a flip...

tellopilots.com

It happens when you issue commands too fast and Tello is not ready for the next command.

AIDrone · Jul 12, 2021

Zar said:
hi, I am having an error in python code in video capturing. Anyone who can help. The tello light turns green but it does not show anything on screen.
OpenCV(4.5.2) C:\Users\runneradmin\AppData\Local\Temp\pip-req-build-1bq9o88m\opencv\modules\imgproc\src\resize.cpp:4051: error: (-215:Assertion failed) !ssize.empty() in function 'cv::resize'

Your problem seems to resemble this issue on DJITelloPY Github repo. According to the maintainer's responses, you should try updating your djitellopy library or try installing djitellopy2 library.
For your easy reference:
1. pip uninstall djitellopy
2. pip install https://github.com/damiafuentes/DJITelloPy/archive/master.zip

This will install the latest version of the djitellopy library.
Hope this helps.

I've made a software using Python, JS and the DJITelloPy Library, for Tello drone. It enhances your drone's ability by adding on some of the most sought AI features, like Object Detection, Human Pose Estimation and Voice Commands, to your Tello Drone. You can check it out at www.aidronesoftware.com.
You can download the software for free (limited offer) using this LINK, after signing up.

Thank you.

keshav · Dec 28, 2021

pzmn said:
Python:

Code:

from djitellopy import Tello tello = Tello()

kurnis said:
I had the same problems. I solved it reseting the drone:

Long press Tello for 5 seconds while Tello is on, and the indicator light will turn off and then flash yellow. When the indicator light shows a flashing yellow light, the Wi-Fi SSID and password will be reset to the factory settings, and there is no password by default.

did you know you are amazing?

keshav · Dec 28, 2021

kurnis said:
I had the same problems. I solved it reseting the drone:

Long press Tello for 5 seconds while Tello is on, and the indicator light will turn off and then flash yellow. When the indicator light shows a flashing yellow light, the Wi-Fi SSID and password will be reset to the factory settings, and there is no password by default.

u solved my problem. thx