Hello Tello Pilot!
Join our DJI Tello community & remove this banner.
Sign up

Message: File Data

  • Views Views: 364
  • Last updated Last updated:
    • Direction: Two-way
    • Payload From Drone: 12-byte header followed by variable data
    • Payload To Drone (Response): See below
    The inbound header is structured as follows...

    Byte

    Purpose​

    Comment​

    0-1

    File ID

    Little-endian 16-bit unsigned integer

    2-5

    File Piece #

    Little-endian 32-bit unsigned integer

    6-9

    File Chunk #

    As above

    10-11

    Chunk Length

    Little-endian 16-bit unsigned integer



    A blob of data follows.

    Note that chunks may be repeated and duplicates should be ignored.

    Each "piece" of the file comes in 8 chunks.

    Once all chunks have arrived the piece must be ack'd with a File Data message otherwise it will be resent.

    The ack payload is structured as follows...

    Byte

    Purpose​

    Comment​

    0

    Done

    1 = OK, 0 = NAK

    1-2

    File ID

    As above

    3-5

    File Piece #

    As above



    The final piece may consist of fewer than 8 chunks - you must ack it anyway.

    Once all pieces have been sent and ack'd, you must send a File Done message.