BUG TO FIX: rtltcp clients expect a special header to be sent before anything else. This header is sent by my soapytcp repo but not this repo. I need to add the following to the top of the code: "tuner_number = 5 # R820T; tuner_gains = 29 # R820T; dongle_info = struct.pack('>4sII', b'RTL0', tuner_number, tuner_gains)" and then add "conn.sendall(dongle_info)" after "self.open_conn(conn, client_address)". Not doing this causes for example HDSDR to fail when using another Extio besides mine.

osmotcp.py

This repo provides a Python 2.7 gnuradio script named osmotcp.py. The script serves samples from any gr-osmosdr supported device over TCP/IP. The server supports the RTL_TCP protocol. In addition the output stream can be configured to send either signed words or floating point IQ samples -- not just the default unsigned byte IQ samples of RTL_TCP.

Usage for osmotcp.py is as follow:

$ python osmotcp.py -h

usage: osmotcp.py [-h] [--args ARGS] [--freq FREQ] [--rate RATE] [--corr CORR]
                  [--gain GAIN] [--auto] [--word] [--left] [--float]
                  [--host HOST] [--port PORT] [--output OUTPUT]

optional arguments:
  -h, --help       show this help message and exit
  --args ARGS      device arguments
  --freq FREQ      center frequency (Hz)
  --rate RATE      sample rate (Hz)
  --corr CORR      freq correction (ppm)
  --gain GAIN      gain (dB)
  --peak       show peak values in dBFS
  --auto           turn on automatic gain
  --word           signed word samples
  --left           left justified unsigned byte samples
  --float          32-bit float samples
  --host HOST      host address
  --port PORT      port address
  --output OUTPUT  output file to save 32-bit float samples

Use the --output option to save raw 32bit float samples to a file while serving.

By default the TCP server stream 8 bit unsigned samples. Use the --word or --float option to serve 16 bit IQ integers or 32 bit IQ floats instead.

The --left option multiplies the raw 32 bit samples by 256 before serving.
This option is useful with the airspyhf+.

Use --peak to print peak VU meter information to stderr.

Here is screenshot of SDRTouch connected to osmotcp serving samples from "rtl=0"

• Copyright 2018 (c) roseengineering