Tello Low-Level Protocol Wrapper

A wrapper for Tello Low-Level Protocol for Java applications.

Usage

You can access the Tello Low-Level Protocol by simple interface of Facade.

• run : Start communication with the Tello.
• entryCommand : Sends a command to Tello.
  • Supported Commands:
    • takeoff
    • land
    • stick rx ry lx ly speed
      • rx: (left) -1 < 0 < 1 (right)
      • ry: (backward) -1 < 0 < 1 (forward)
      • lx: (down) -1 < 0 < 1 (up)
      • ly: (ccw) -1 < 0 < 1 (cw)
      • speed: 0 (slow) or 1 (fast)
    • picture - Take a picture and save the jpeg file in the ~/Downloads folder.
• pickImage : Get a video frame image (960*720 RGB24) as a byte array.
• getStates : Get the Tello states as text like: bat:%d;lit:%d;wifi:%d;yaw:%d
• setRecording : If true, video recording will start; if false, the video will be saved in the ~/Downloads folder.

Example

For example, the operation "take off, take a picture, and land" would be the following code:

public class Example {
    @Test
    public void testPicture() throws Exception {
        try (SimpleMain main = new SimpleMain()) {

            // start communication with Tello
            main.run();
            Thread.sleep(2000);

            // takeoff
            main.entryCommand("takeoff");
            Thread.sleep(3000);

            // take a picture
            main.entryCommand("picture");
            Thread.sleep(3000);

            // land
            main.entryCommand("land");
        }
    }
}

For more details, see: Example.java

Required Software

See build.gradle for the software on which this software depends.

License

This software is released under the MIT License, see LICENSE.

Acknowledgements

This code is based on the achievements of the great pioneers:

• Tello Development Wiki
• TelloPy
• TelloLib
• Gobot
• https://qiita.com/mozzio369/items/8e0fb12dc30c493f5cc4