Can't Command Tello With Python3

[SteveinAtlanta]

Hi, I'm new to the tello development environment and I'm having problems getting the Tello to respond to any commands in the SDK.
I have the latest firmware on the Tello according to the IOS app.
I'm running Python 3.6.8 on Linux Mint
I'm using the tello3.py script from the sdk. Unmodified.
I can connect to the Tello via wifi and ping 192.168.10.1 successfully.
When I send any of the commands listed in the help line nothing happens.
Using Wireshark I can see the commands sent as ascii on the UDP socket.
When I connect to the tello the LED is yellow and blinking quickly.

I think there is something minor that I've missed here. Any ideas?

Thanks,
Steve

 

[f41ardu]

Any command?

Send "command" as first command to enter into the SDK mode.
Try it until you receive "OK". LED turns into green.
Then send "takeoff".

If you already tried this, I have no idea and need further information about your configuration.