RFspace NetSDR Bedienungsanleitung PDF herunterladen (Seite 24)

May 4, 2013

Page 24 of 28

11 Network Protocol

All networking uses TCP/IP. The console creates two connections with the server:

 Command and status,

 Audio and FFT data.

Although one connection could be used the aim is to have the audio streaming with the

lowest possible latency, hence the two-channel approach. Nothing which is sent on the

command channel affects the data channel.

The information presented here is by no means complete; it servers only to outline the

technology used. If necessary the exact protocol and message formats will be documented

at a later date.

11.1 Command Channel

All commands are sent as UTF-8 XML, the XML is compressed using Lempel–Ziv–Storer–

Szymanski (LZSS) to reduce bandwidth.

The messages sent are:

 Connection

o Ack, sent by the console every 500 milliseconds as a keep alive message.

The message contains a timestamp used to determine the round trip time.

o Login, sent when establishing a connection.

o UpdateDemod, updates the demodulation options for a VFO channel.

 Radio

o Start, sent when starting a radio.

o Stop, sent when stopping a radio.

o UpdateRadio, update the radio settings such as RF gain.

 Data (IQ) Recording

o RecorderStart, starts data (IQ) recording on the server.

o RecorderStop, stops data (IQ) recording on the server.

 Data (IQ) Playback

o PlaybackFiles, server returns a list of recordings for a specific folder.

o PlaybackFileInfo, server returns detailed information for a specific recording

file.

o PlaybackFileGain, adjusts the gain in the player.

1 2 ... 19 20 21 22 23 24 25 26 27 28

Keine Kommentare

RFspace NetSDR Bedienungsanleitung Seite 24