Play with this entirely at your own risk - it's not the author's fault if you lose your drone or damage it, or anything else, when using this software.

Telloterm currently provides

detailed Tello status display
control from the keyboard
picture taking
optional live video feed via mplayer (must be installed separately)
optional control via a Dualshock 4 game controller or Thrustmaster HotasX flight controller

Only tested on GNU/Linux - it almost certainly won't work as-is on other platforms.

Install

go get github.com/SMerrony/telloterm

If you wish to use the video window you must have mplayer installed and on your PATH.

Usage

Centre the throttle control at the mid-position if using a flight controller
Turn on the Tello
Wait for it to initialise (flashing orange LED)
Connect your computer to the Tello WiFi
Run telloterm from a terminal window

Hit 'v' to start a video feed, an mplayer window should appear.

To get help type telloterm -h

Use the -joyhelp option to see the joystick control mappings. You will need to specify an ID and type to use a joystick.

Use the -keyhelp option to see the keyboard control mappings. Be aware that in keyboard mode Tello motion continues until you counteract it, or stop the Tello with the space bar.

If you find that mplayer takes over the whole screen (rather than being in its own window), then try the -x11 option which may help.

N.B. To control the Tello the telloterm window must have focus.

Once you have landed the drone, stop the program with the Q key, and photos that have been successfully taken will then be saved in the current directory.