Badger water meter Gnu Radio

my-badger.grc

options:
  parameters:
    author: CFSworks
    category: '[GRC Hier Blocks]'
    cmake_opt: ''
    comment: ''
    copyright: ''
    description: ''
    gen_cmake: 'On'
    gen_linking: dynamic
    generate_options: no_gui
    hier_block_src_path: '.:'
    id: orion
    max_nouts: '0'
    output_language: python
    placement: (0,0)
    qt_qss_theme: ''
    realtime_scheduling: ''
    run: 'True'
    run_command: '{python} -u {filename}'
    run_options: run
    sizing_mode: fixed
    thread_safe_setters: ''
    title: Orion RF decoder
    window_size: ''
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [8, 8]
    rotation: 0
    state: enabled

blocks:
- name: center_freq
  id: variable
  parameters:
    comment: ''
    value: 916.1e6
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [483, 21]
    rotation: 0
    state: true
- name: chan_freq
  id: variable
  parameters:
    comment: ''
    value: 916.448e6
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [861, 1]
    rotation: 0
    state: true
- name: decim
  id: variable
  parameters:
    comment: ''
    value: '22'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [201, 82]
    rotation: 0
    state: true
- name: fsk_deviation_hz
  id: variable
  parameters:
    comment: ''
    value: samp_rate/2
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [345, 16]
    rotation: 0
    state: true
- name: samp_rate
  id: variable
  parameters:
    comment: ''
    value: 11e6
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [210, 11]
    rotation: 0
    state: enabled
- name: analog_pll_freqdet_cf_0
  id: analog_pll_freqdet_cf
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    max_freq: fsk_deviation_hz*1.2/(samp_rate)*(3.1415*2)
    maxoutbuf: '0'
    min_freq: -fsk_deviation_hz*1.2/(samp_rate)*(3.1415*2)
    minoutbuf: '0'
    w: '0.05'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [22, 230]
    rotation: 270
    state: true
- name: analog_sig_source_x_0
  id: analog_sig_source_x
  parameters:
    affinity: ''
    alias: ''
    amp: '1'
    comment: ''
    freq: center_freq - chan_freq
    maxoutbuf: '0'
    minoutbuf: '0'
    offset: '0'
    phase: '0'
    samp_rate: samp_rate
    type: complex
    waveform: analog.GR_COS_WAVE
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [633, -15]
    rotation: 180
    state: true
- name: blocks_multiply_xx_0
  id: blocks_multiply_xx
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    num_inputs: '2'
    type: complex
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [354, 166]
    rotation: 180
    state: true
- name: blocks_throttle_0
  id: blocks_throttle
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    ignoretag: 'True'
    maxoutbuf: '0'
    minoutbuf: '0'
    samples_per_second: 2e6
    type: complex
    vlen: '1'
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [359, 111]
    rotation: 180
    state: disabled
- name: dc_blocker_xx_0
  id: dc_blocker_xx
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    length: '512'
    long_form: 'True'
    maxoutbuf: '0'
    minoutbuf: '0'
    type: cc
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [141, 173]
    rotation: 180
    state: enabled
- name: epy_block_0
  id: epy_block
  parameters:
    _source_code: "import numpy as np\nfrom gnuradio import gr\nimport pmt\n\nPREAMBLE_BITS\
      \ = 38\nSYNC_BITS     = 10\nPAYLOAD_BITS  = 120\nFOOTER_BITS   = 16\n\nclass\
      \ blk(gr.basic_block):\n    \"\"\"Orion receiver\"\"\"\n\n    def __init__(self,\
      \ samples_per_bit=5, threshold=60):\n        gr.sync_block.__init__(\n     \
      \       self,\n            name='Orion receiver',\n            in_sig=[np.float32],\n\
      \            out_sig=[]\n        )\n\n        self.samples_per_bit = samples_per_bit\n\
      \        self.threshold = threshold\n\n        self.message_port_register_out(pmt.intern('msg'))\n\
      \n\n    def demodulate(self, samples):\n        bits = np.zeros(PREAMBLE_BITS\
      \ + SYNC_BITS + PAYLOAD_BITS + FOOTER_BITS,\n                        dtype=np.uint8)\n\
      \        stride = 8\n        sample_stride = stride * self.samples_per_bit\n\
      \        assert len(bits) % stride == 0\n\n        strength = np.square(samples\
      \ - np.mean(samples))\n        i = 0\n\n        for bit in range(0, len(bits),\
      \ stride):\n            alignments = strength[i:i+sample_stride]\n         \
      \   if len(alignments) < sample_stride: return None, 0\n            alignments.shape\
      \ = (stride, self.samples_per_bit)\n\n            strongest = np.argmax(np.sum(alignments,\
      \ axis=0)[:3])\n            i += strongest\n\n            window = samples[i:i+sample_stride:self.samples_per_bit]\n\
      \            bits[bit:bit+stride] = window > np.mean(window)\n\n           \
      \ i += sample_stride - 1\n\n        return bits, i\n\n\n    @staticmethod\n\
      \    def realign(msg):\n        template = np.zeros(SYNC_BITS+PAYLOAD_BITS+FOOTER_BITS,\
      \ dtype=np.int8)\n        template[:SYNC_BITS] = [-1, -1, -1, -1, 1, 1, 1, 1,\
      \ -1, 1]\n        template[-FOOTER_BITS:]   = -1\n        template[-FOOTER_BITS::2]\
      \ = 1\n\n        corr = np.correlate(msg.astype(np.int8)*2-1, template, mode='valid')\n\
      \        best = np.argmax(corr)\n        if corr[best] < np.sum(np.abs(template))*0.9:\
      \ return None\n        return np.packbits(msg[best+SYNC_BITS:][:PAYLOAD_BITS])\n\
      \n\n    def work(self, input_items, output_items):\n        preamble = np.zeros(PREAMBLE_BITS\
      \ * self.samples_per_bit)\n        preamble[::self.samples_per_bit] = 1\n  \
      \      preamble[::2*self.samples_per_bit] = -1\n\n        detect = np.correlate(input_items[0],\
      \ preamble, mode='valid')\n        if np.all(detect < self.threshold):\n   \
      \         # No beginning of preamble detected, throw out whole buffer\n    \
      \        return len(detect)\n\n        first = np.argwhere(detect >= self.threshold)[0][0]\n\
      \        begin = np.argmax(detect[:first+len(preamble)])\n\n        msg, consume\
      \ = self.demodulate(input_items[0][begin:])\n        consume += begin\n\n  \
      \      if msg is not None:\n            msg = self.realign(msg)\n\n        if\
      \ msg is not None:\n            send_pmt = pmt.make_u8vector(len(msg), 0)\n\
      \            for i,b in enumerate(msg):\n                pmt.u8vector_set(send_pmt,\
      \ i, int(b))\n            self.message_port_pub(pmt.intern('msg'), pmt.cons(pmt.PMT_NIL,\
      \ send_pmt))\n\n        return consume\n"
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
    samples_per_bit: int(samp_rate//100e3//decim)
    threshold: '0.05'
  states:
    _io_cache: ('Orion receiver', 'blk', [('samples_per_bit', '5'), ('threshold',
      '60')], [('0', 'float', 1)], [('msg', 'message', 1)], 'Orion receiver', ['samples_per_bit',
      'threshold'])
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [559, 337]
    rotation: 0
    state: true
- name: epy_block_1
  id: epy_block
  parameters:
    _source_code: "import numpy as np\nfrom gnuradio import gr\nimport pmt\nimport\
      \ time\n\n\nclass blk(gr.basic_block):\n    def __init__(self, interval=3.0):\n\
      \        gr.sync_block.__init__(\n            self,\n            name='PDU logger',\n\
      \            in_sig=[],\n            out_sig=[]\n        )\n\n        self.message_port_register_in(pmt.intern('msg'))\n\
      \        self.message_port_register_in(pmt.intern('pdu'))\n        self.set_msg_handler(pmt.intern('msg'),\
      \ self.handle_msg)\n        self.set_msg_handler(pmt.intern('pdu'), self.handle_pdu)\n\
      \n        self._last_log = 0\n        self.interval = interval\n\n\n    def\
      \ handle_msg(self, msg_pmt):\n        now = time.time()\n        if now - self._last_log\
      \ <= self.interval:\n            return\n        self._last_log = now\n\n  \
      \      print(f'{time.ctime()}: {pmt.write_string(msg_pmt)}')\n\n\n    def handle_pdu(self,\
      \ pdu_pmt):\n        now = time.time()\n        if now - self._last_log <= self.interval:\n\
      \            return\n        self._last_log = now\n\n        pdu = pmt.cdr(pdu_pmt)\n\
      \        data = ' '.join('%02x' % x for x in pmt.u8vector_elements(pdu))\n \
      \       print(f'{time.ctime()}: {data}')\n"
    affinity: ''
    alias: ''
    comment: ''
    interval: '0.5'
    maxoutbuf: '0'
    minoutbuf: '0'
  states:
    _io_cache: ('PDU logger', 'blk', [('interval', '3.0')], [('pdu', 'message', 1),
      ('msg', 'message', 1)], [], '', ['interval'])
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [988, 411]
    rotation: 0
    state: true
- name: epy_block_2
  id: epy_block
  parameters:
    _source_code: "import numpy as np\nfrom gnuradio import gr\nimport pmt\n\nfrom\
      \ functools import reduce\nimport struct\n\nCODEBOOK = [\n    0b010110, # 0\n\
      \    0b001101, # 1\n    0b001110, # 2\n    0b001011, # 3\n    0b011100, # 4\n\
      \    0b011001, # 5\n    0b011010, # 6\n    0b010011, # 7\n    0b101100, # 8\n\
      \    0b100101, # 9\n    0b100110, # a\n    0b100011, # b\n    0b110100, # c\n\
      \    0b110001, # d\n    0b110010, # e\n    0b101001, # f\n]\n\nclass blk(gr.basic_block):\n\
      \    \"\"\"Orion decode\"\"\"\n\n    def __init__(self):\n        gr.sync_block.__init__(\n\
      \            self,\n            name='Orion decode',\n            in_sig=[],\n\
      \            out_sig=[]\n        )\n\n        self.message_port_register_in(pmt.intern('msg'))\n\
      \        self.message_port_register_out(pmt.intern('msg_fail'))\n        self.message_port_register_out(pmt.intern('consumption'))\n\
      \n        self.set_msg_handler(pmt.intern('msg'), self.handle_msg)\n\n\n   \
      \ def handle_msg(self, msg):\n        out = self.decode(msg)\n        if out:\n\
      \            self.message_port_pub(pmt.intern('consumption'), out)\n       \
      \ else:\n            self.message_port_pub(pmt.intern('msg_fail'), msg)\n\n\n\
      \    @staticmethod\n    def do_crc(x):\n        taps = 0x13d65\n        i =\
      \ 0\n        while (1<<i)<x: i += 1\n        while i:\n            i -= 1\n\
      \            x = min(x, x^(taps<<i))\n        return x\n\n\n    def decode(self,\
      \ msg):\n        data = pmt.cdr(msg)\n\n        if not pmt.is_u8vector(data):\
      \ return\n\n        ary = np.array(list(pmt.u8vector_elements(data)), dtype=np.uint8)\n\
      \        bits = np.unpackbits(ary)\n        if len(bits)%6 != 0: return\n  \
      \      bits.shape = (-1, 6)\n\n        codewords = list(np.dot(bits, [32, 16,\
      \ 8, 4, 2, 1]))\n        try:\n            nybbles = [CODEBOOK.index(w) for\
      \ w in codewords]\n        except ValueError:\n            return\n\n      \
      \  b = bytes(nybbles[x*2]*16 + nybbles[x*2+1] for x in range(len(nybbles)//2))\n\
      \n        if self.do_crc(reduce(lambda x,y: x<<8 | y, b)) != 0xFFFF: return\n\
      \n        sender, consumption, _ = struct.unpack('<IIH', b)\n\n        out =\
      \ pmt.make_dict()\n        out = pmt.dict_add(out, pmt.intern('sender'), pmt.from_long(sender))\n\
      \        out = pmt.dict_add(out, pmt.intern('consumption'), pmt.from_long(consumption))\n\
      \        return out\n"
    affinity: ''
    alias: ''
    comment: ''
    maxoutbuf: '0'
    minoutbuf: '0'
  states:
    _io_cache: ('Orion decode', 'blk', [], [('msg', 'message', 1)], [('consumption',
      'message', 1), ('msg_fail', 'message', 1)], 'Orion decode', [])
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [715, 410]
    rotation: 0
    state: true
- name: fir_filter_xxx_0
  id: fir_filter_xxx
  parameters:
    affinity: ''
    alias: ''
    comment: ''
    decim: '1'
    maxoutbuf: '0'
    minoutbuf: '0'
    samp_delay: '1'
    taps: '[0.225, 0.55, 0.225]'
    type: fff
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [371, 396]
    rotation: 0
    state: enabled
- name: low_pass_filter_0
  id: low_pass_filter
  parameters:
    affinity: ''
    alias: ''
    beta: '6.76'
    comment: ''
    cutoff_freq: 300e3
    decim: decim
    gain: '1'
    interp: '1'
    maxoutbuf: '0'
    minoutbuf: '0'
    samp_rate: samp_rate
    type: fir_filter_fff
    width: 50e3
    win: firdes.WIN_HAMMING
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [195, 308]
    rotation: 0
    state: enabled
- name: osmosdr_source_0
  id: osmosdr_source
  parameters:
    affinity: ''
    alias: ''
    ant0: ''
    ant1: ''
    ant10: ''
    ant11: ''
    ant12: ''
    ant13: ''
    ant14: ''
    ant15: ''
    ant16: ''
    ant17: ''
    ant18: ''
    ant19: ''
    ant2: ''
    ant20: ''
    ant21: ''
    ant22: ''
    ant23: ''
    ant24: ''
    ant25: ''
    ant26: ''
    ant27: ''
    ant28: ''
    ant29: ''
    ant3: ''
    ant30: ''
    ant31: ''
    ant4: ''
    ant5: ''
    ant6: ''
    ant7: ''
    ant8: ''
    ant9: ''
    args: '""'
    bb_gain0: '20'
    bb_gain1: '20'
    bb_gain10: '20'
    bb_gain11: '20'
    bb_gain12: '20'
    bb_gain13: '20'
    bb_gain14: '20'
    bb_gain15: '20'
    bb_gain16: '20'
    bb_gain17: '20'
    bb_gain18: '20'
    bb_gain19: '20'
    bb_gain2: '20'
    bb_gain20: '20'
    bb_gain21: '20'
    bb_gain22: '20'
    bb_gain23: '20'
    bb_gain24: '20'
    bb_gain25: '20'
    bb_gain26: '20'
    bb_gain27: '20'
    bb_gain28: '20'
    bb_gain29: '20'
    bb_gain3: '20'
    bb_gain30: '20'
    bb_gain31: '20'
    bb_gain4: '20'
    bb_gain5: '20'
    bb_gain6: '20'
    bb_gain7: '20'
    bb_gain8: '20'
    bb_gain9: '20'
    bw0: '0'
    bw1: '0'
    bw10: '0'
    bw11: '0'
    bw12: '0'
    bw13: '0'
    bw14: '0'
    bw15: '0'
    bw16: '0'
    bw17: '0'
    bw18: '0'
    bw19: '0'
    bw2: '0'
    bw20: '0'
    bw21: '0'
    bw22: '0'
    bw23: '0'
    bw24: '0'
    bw25: '0'
    bw26: '0'
    bw27: '0'
    bw28: '0'
    bw29: '0'
    bw3: '0'
    bw30: '0'
    bw31: '0'
    bw4: '0'
    bw5: '0'
    bw6: '0'
    bw7: '0'
    bw8: '0'
    bw9: '0'
    clock_source0: ''
    clock_source1: ''
    clock_source2: ''
    clock_source3: ''
    clock_source4: ''
    clock_source5: ''
    clock_source6: ''
    clock_source7: ''
    comment: ''
    corr0: '0'
    corr1: '0'
    corr10: '0'
    corr11: '0'
    corr12: '0'
    corr13: '0'
    corr14: '0'
    corr15: '0'
    corr16: '0'
    corr17: '0'
    corr18: '0'
    corr19: '0'
    corr2: '0'
    corr20: '0'
    corr21: '0'
    corr22: '0'
    corr23: '0'
    corr24: '0'
    corr25: '0'
    corr26: '0'
    corr27: '0'
    corr28: '0'
    corr29: '0'
    corr3: '0'
    corr30: '0'
    corr31: '0'
    corr4: '0'
    corr5: '0'
    corr6: '0'
    corr7: '0'
    corr8: '0'
    corr9: '0'
    dc_offset_mode0: '0'
    dc_offset_mode1: '0'
    dc_offset_mode10: '0'
    dc_offset_mode11: '0'
    dc_offset_mode12: '0'
    dc_offset_mode13: '0'
    dc_offset_mode14: '0'
    dc_offset_mode15: '0'
    dc_offset_mode16: '0'
    dc_offset_mode17: '0'
    dc_offset_mode18: '0'
    dc_offset_mode19: '0'
    dc_offset_mode2: '0'
    dc_offset_mode20: '0'
    dc_offset_mode21: '0'
    dc_offset_mode22: '0'
    dc_offset_mode23: '0'
    dc_offset_mode24: '0'
    dc_offset_mode25: '0'
    dc_offset_mode26: '0'
    dc_offset_mode27: '0'
    dc_offset_mode28: '0'
    dc_offset_mode29: '0'
    dc_offset_mode3: '0'
    dc_offset_mode30: '0'
    dc_offset_mode31: '0'
    dc_offset_mode4: '0'
    dc_offset_mode5: '0'
    dc_offset_mode6: '0'
    dc_offset_mode7: '0'
    dc_offset_mode8: '0'
    dc_offset_mode9: '0'
    freq0: center_freq
    freq1: 100e6
    freq10: 100e6
    freq11: 100e6
    freq12: 100e6
    freq13: 100e6
    freq14: 100e6
    freq15: 100e6
    freq16: 100e6
    freq17: 100e6
    freq18: 100e6
    freq19: 100e6
    freq2: 100e6
    freq20: 100e6
    freq21: 100e6
    freq22: 100e6
    freq23: 100e6
    freq24: 100e6
    freq25: 100e6
    freq26: 100e6
    freq27: 100e6
    freq28: 100e6
    freq29: 100e6
    freq3: 100e6
    freq30: 100e6
    freq31: 100e6
    freq4: 100e6
    freq5: 100e6
    freq6: 100e6
    freq7: 100e6
    freq8: 100e6
    freq9: 100e6
    gain0: '0'
    gain1: '10'
    gain10: '10'
    gain11: '10'
    gain12: '10'
    gain13: '10'
    gain14: '10'
    gain15: '10'
    gain16: '10'
    gain17: '10'
    gain18: '10'
    gain19: '10'
    gain2: '10'
    gain20: '10'
    gain21: '10'
    gain22: '10'
    gain23: '10'
    gain24: '10'
    gain25: '10'
    gain26: '10'
    gain27: '10'
    gain28: '10'
    gain29: '10'
    gain3: '10'
    gain30: '10'
    gain31: '10'
    gain4: '10'
    gain5: '10'
    gain6: '10'
    gain7: '10'
    gain8: '10'
    gain9: '10'
    gain_mode0: 'True'
    gain_mode1: 'False'
    gain_mode10: 'False'
    gain_mode11: 'False'
    gain_mode12: 'False'
    gain_mode13: 'False'
    gain_mode14: 'False'
    gain_mode15: 'False'
    gain_mode16: 'False'
    gain_mode17: 'False'
    gain_mode18: 'False'
    gain_mode19: 'False'
    gain_mode2: 'False'
    gain_mode20: 'False'
    gain_mode21: 'False'
    gain_mode22: 'False'
    gain_mode23: 'False'
    gain_mode24: 'False'
    gain_mode25: 'False'
    gain_mode26: 'False'
    gain_mode27: 'False'
    gain_mode28: 'False'
    gain_mode29: 'False'
    gain_mode3: 'False'
    gain_mode30: 'False'
    gain_mode31: 'False'
    gain_mode4: 'False'
    gain_mode5: 'False'
    gain_mode6: 'False'
    gain_mode7: 'False'
    gain_mode8: 'False'
    gain_mode9: 'False'
    if_gain0: '20'
    if_gain1: '20'
    if_gain10: '20'
    if_gain11: '20'
    if_gain12: '20'
    if_gain13: '20'
    if_gain14: '20'
    if_gain15: '20'
    if_gain16: '20'
    if_gain17: '20'
    if_gain18: '20'
    if_gain19: '20'
    if_gain2: '20'
    if_gain20: '20'
    if_gain21: '20'
    if_gain22: '20'
    if_gain23: '20'
    if_gain24: '20'
    if_gain25: '20'
    if_gain26: '20'
    if_gain27: '20'
    if_gain28: '20'
    if_gain29: '20'
    if_gain3: '20'
    if_gain30: '20'
    if_gain31: '20'
    if_gain4: '20'
    if_gain5: '20'
    if_gain6: '20'
    if_gain7: '20'
    if_gain8: '20'
    if_gain9: '20'
    iq_balance_mode0: '0'
    iq_balance_mode1: '0'
    iq_balance_mode10: '0'
    iq_balance_mode11: '0'
    iq_balance_mode12: '0'
    iq_balance_mode13: '0'
    iq_balance_mode14: '0'
    iq_balance_mode15: '0'
    iq_balance_mode16: '0'
    iq_balance_mode17: '0'
    iq_balance_mode18: '0'
    iq_balance_mode19: '0'
    iq_balance_mode2: '0'
    iq_balance_mode20: '0'
    iq_balance_mode21: '0'
    iq_balance_mode22: '0'
    iq_balance_mode23: '0'
    iq_balance_mode24: '0'
    iq_balance_mode25: '0'
    iq_balance_mode26: '0'
    iq_balance_mode27: '0'
    iq_balance_mode28: '0'
    iq_balance_mode29: '0'
    iq_balance_mode3: '0'
    iq_balance_mode30: '0'
    iq_balance_mode31: '0'
    iq_balance_mode4: '0'
    iq_balance_mode5: '0'
    iq_balance_mode6: '0'
    iq_balance_mode7: '0'
    iq_balance_mode8: '0'
    iq_balance_mode9: '0'
    maxoutbuf: '0'
    minoutbuf: '0'
    nchan: '1'
    num_mboards: '1'
    sample_rate: samp_rate
    sync: sync
    time_source0: ''
    time_source1: ''
    time_source2: ''
    time_source3: ''
    time_source4: ''
    time_source5: ''
    time_source6: ''
    time_source7: ''
    type: fc32
  states:
    bus_sink: false
    bus_source: false
    bus_structure: null
    coordinate: [595, 108]
    rotation: 180
    state: true

connections:
- [analog_pll_freqdet_cf_0, '0', low_pass_filter_0, '0']
- [analog_sig_source_x_0, '0', blocks_multiply_xx_0, '0']
- [blocks_multiply_xx_0, '0', dc_blocker_xx_0, '0']
- [dc_blocker_xx_0, '0', analog_pll_freqdet_cf_0, '0']
- [epy_block_0, msg, epy_block_2, msg]
- [epy_block_2, consumption, epy_block_1, msg]
- [epy_block_2, msg_fail, epy_block_1, pdu]
- [fir_filter_xxx_0, '0', epy_block_0, '0']
- [low_pass_filter_0, '0', fir_filter_xxx_0, '0']
- [osmosdr_source_0, '0', blocks_multiply_xx_0, '1']
- [osmosdr_source_0, '0', blocks_throttle_0, '0']

metadata:
  file_format: 1