Module: PWN::SDR::Decoder::Morse

Defined in:
lib/pwn/sdr/decoder/morse.rb

Overview

CW / Morse decoder for the amateur CW sub-bands (cw20/cw40/cw80, amateur_30m). GQRX's CW demodulator produces a ~700 Hz sidetone in the 48 kHz UDP audio stream; multimon-ng's MORSE_CW demod recovers the dit/dah timing and prints decoded characters one line at a time.

Class Method Summary collapse

Class Method Details

.authors ⇒ Object

Author(s)

0day Inc. support@0dayinc.com



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# File 'lib/pwn/sdr/decoder/morse.rb', line 44

public_class_method def self.authors
  "AUTHOR(S):\n  0day Inc. <support@0dayinc.com>\n"
end

.decode(opts = {}) ⇒ Object

Supported Method Parameters

PWN::SDR::Decoder::Morse.decode( freq_obj: 'required - freq_obj returned from PWN::SDR::GQRX.init_freq' )



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# File 'lib/pwn/sdr/decoder/morse.rb', line 16

public_class_method def self.decode(opts = {})
  freq_obj = opts[:freq_obj]

  PWN::SDR::Decoder::Base.run_pipeline(
    freq_obj: freq_obj,
    protocol: 'MORSE-CW',
    required_bins: %w[sox multimon-ng],
    decode_cmd: 'multimon-ng -q -t raw -a MORSE_CW -',
    line_match: /\S/,
    parser: proc { |line| parse_line(line: line) }
  )
end

.help ⇒ Object

Display Usage for this Module



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# File 'lib/pwn/sdr/decoder/morse.rb', line 50

public_class_method def self.help
  puts "USAGE:
    #{self}.decode(
      freq_obj: 'required - freq_obj returned from PWN::SDR::GQRX.init_freq'
    )

    #{self}.parse_line(line: 'CQ CQ DE W1AW W1AW K')

    #{self}.authors
  "
end

.parse_line(opts = {}) ⇒ Object

Supported Method Parameters

PWN::SDR::Decoder::Morse.parse_line(line: 'CQ CQ DE W1AW')



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# File 'lib/pwn/sdr/decoder/morse.rb', line 32

public_class_method def self.parse_line(opts = {})
  line = opts[:line].to_s.gsub(/^MORSE(?:_CW)?:\s*/i, '').strip
  out  = { protocol: 'MORSE-CW', text: line }
  if (m = line.match(/\b([A-Z0-9]{1,3}\d[A-Z]{1,4})\b/))
    out[:callsign] = m[1]
  end
  out[:summary] = "CW #{line}"[0, 120]
  out
end