UDP Communication Details

UDP packets are used as a means of getting telemetry packets (non-imagery data) into and out of the Wenet system, allowing other data packets to be relayed to the ground via the Wenet link.

Wenet Receiver

The Wenet receiver code will emit any non-imagery packets into the local network via UDP broadcast on port 55672. The packets are emitted in the format:

{
  'type': 'WENET',
  'packet': [0,1,2,3,4...,255] # The packet contents, represented as a list of bytes.
}

Refer here for information on packet formats.

Wenet Transmitter

If a udp_listener argument (a UDP port number) is provided to the PacketTX class, then the PacketTX class will listen on the provided port for JSON objects of the form:

Text Messages to be Relayed

{
  'type': 'WENET_TX_TEXT',
  'packet': 'Arbitrary text message to be downlinked'
}

Secondary Payload Telemetry

{
  'type': 'WENET_TX_SEC_PAYLOAD',
  'id': 1, # Secondary payload ID (0-255)
  'repeats': 1, # Transmit packet this many times.
  'packet': [0,...,253] # Array of numbers representing the packet contents. Converted to a byte-array before transmit.
}