examples: first autonomous FM capture — Pitbull on 101.1 MHz
LLM-driven SDR session recorded 2026-01-28T15:05:21-07:00. Built flowgraph via MCP tools, launched in Docker with RTL-SDR USB passthrough, captured 128s of WBFM audio to WAV. Song identified via songrec/Shazam: "Damn I Love Miami" by Pitbull & Lil Jon. Signal chain: RTL2838 → osmocom source (2.4 MS/s) → LPF (100 kHz, ÷5) → WBFM demod (÷10) → 48 kHz WAV Includes GRC flowgraph, WAV recording, and helper scripts.
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examples/fm_101_1.grc
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examples/fm_101_1.grc
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options:
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parameters:
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author: ''
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catch_exceptions: 'True'
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category: '[GRC Hier Blocks]'
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cmake_opt: ''
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comment: ''
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copyright: ''
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description: ''
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gen_cmake: 'On'
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gen_linking: dynamic
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generate_options: qt_gui
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hier_block_src_path: '.:'
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id: default
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max_nouts: '0'
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output_language: python
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placement: (0,0)
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qt_qss_theme: ''
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realtime_scheduling: ''
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run: 'True'
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run_command: '{python} -u {filename}'
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run_options: prompt
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sizing_mode: fixed
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thread_safe_setters: ''
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title: Not titled yet
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window_size: (1000,1000)
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states:
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bus_sink: false
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bus_source: false
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bus_structure: null
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coordinate: [8, 8]
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rotation: 0
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state: enabled
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blocks:
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- name: freq
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id: variable
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parameters:
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comment: ''
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value: 101.1e6
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states:
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bus_sink: false
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bus_source: false
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bus_structure: null
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state: enabled
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- name: samp_rate
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id: variable
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parameters:
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comment: ''
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value: int(2.4e6)
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states:
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bus_sink: false
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bus_source: false
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bus_structure: null
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state: enabled
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- name: analog_wfm_rcv_1
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id: analog_wfm_rcv
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parameters:
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affinity: ''
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alias: ''
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audio_decimation: '10'
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comment: ''
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maxoutbuf: '0'
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minoutbuf: '0'
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quad_rate: 480e3
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states:
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bus_sink: false
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bus_source: false
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bus_structure: null
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state: enabled
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- name: blocks_wavfile_sink_0
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id: blocks_wavfile_sink
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parameters:
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affinity: ''
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alias: ''
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append: 'False'
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bits_per_sample1: FORMAT_PCM_16
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bits_per_sample2: FORMAT_PCM_16
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bits_per_sample3: FORMAT_VORBIS
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bits_per_sample4: FORMAT_PCM_16
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comment: ''
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file: ''
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format: FORMAT_WAV
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nchan: '1'
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samp_rate: samp_rate
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states:
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bus_sink: false
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bus_source: false
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bus_structure: null
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state: enabled
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- name: low_pass_filter_1
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id: low_pass_filter
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parameters:
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affinity: ''
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alias: ''
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beta: '6.76'
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comment: ''
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cutoff_freq: 100e3
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decim: '5'
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gain: '1'
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interp: '1'
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maxoutbuf: '0'
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minoutbuf: '0'
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samp_rate: 2.4e6
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type: fir_filter_ccf
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width: 10e3
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win: window.WIN_HAMMING
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states:
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bus_sink: false
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bus_source: false
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bus_structure: null
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state: enabled
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- name: osmosdr_source_1
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id: osmosdr_source
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parameters:
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affinity: ''
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alias: ''
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ant0: ''
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ant1: ''
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ant10: ''
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ant11: ''
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ant12: ''
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ant13: ''
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ant14: ''
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ant15: ''
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ant16: ''
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ant17: ''
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ant18: ''
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ant19: ''
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ant2: ''
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ant20: ''
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ant21: ''
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ant22: ''
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ant23: ''
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ant24: ''
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ant25: ''
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ant26: ''
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ant27: ''
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ant28: ''
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ant29: ''
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ant3: ''
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ant30: ''
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ant31: ''
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ant4: ''
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ant5: ''
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ant6: ''
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ant7: ''
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ant8: ''
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ant9: ''
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args: '"rtl=0"'
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bb_gain0: '20'
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bb_gain1: '20'
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bb_gain10: '20'
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bb_gain11: '20'
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bb_gain12: '20'
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bb_gain13: '20'
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bb_gain14: '20'
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bb_gain15: '20'
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bb_gain16: '20'
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bb_gain17: '20'
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bb_gain18: '20'
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bb_gain19: '20'
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bb_gain2: '20'
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bb_gain20: '20'
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bb_gain21: '20'
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bb_gain22: '20'
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bb_gain23: '20'
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bb_gain24: '20'
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bb_gain25: '20'
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bb_gain26: '20'
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bb_gain27: '20'
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bb_gain28: '20'
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bb_gain29: '20'
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bb_gain3: '20'
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bb_gain30: '20'
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bb_gain31: '20'
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bb_gain4: '20'
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bb_gain5: '20'
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bb_gain6: '20'
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bb_gain7: '20'
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bb_gain8: '20'
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bb_gain9: '20'
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bw0: '0'
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bw1: '0'
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bw10: '0'
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bw11: '0'
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bw12: '0'
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bw13: '0'
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bw14: '0'
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bw15: '0'
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||||||
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bw16: '0'
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||||||
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bw17: '0'
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||||||
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bw18: '0'
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bw19: '0'
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bw2: '0'
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bw20: '0'
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bw21: '0'
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||||||
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bw22: '0'
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bw23: '0'
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||||||
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bw24: '0'
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||||||
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bw25: '0'
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||||||
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bw26: '0'
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||||||
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bw27: '0'
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||||||
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bw28: '0'
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||||||
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bw29: '0'
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bw3: '0'
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||||||
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bw30: '0'
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bw31: '0'
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bw4: '0'
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||||||
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bw5: '0'
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||||||
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bw6: '0'
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bw7: '0'
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bw8: '0'
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bw9: '0'
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clock_source0: ''
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clock_source1: ''
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clock_source2: ''
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clock_source3: ''
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clock_source4: ''
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clock_source5: ''
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clock_source6: ''
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clock_source7: ''
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comment: ''
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corr0: '0'
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corr1: '0'
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||||||
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corr10: '0'
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corr11: '0'
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||||||
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corr12: '0'
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||||||
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corr13: '0'
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||||||
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corr14: '0'
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||||||
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corr15: '0'
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||||||
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corr16: '0'
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||||||
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corr17: '0'
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||||||
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corr18: '0'
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||||||
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corr19: '0'
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||||||
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corr2: '0'
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||||||
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corr20: '0'
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||||||
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corr21: '0'
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||||||
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corr22: '0'
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||||||
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corr23: '0'
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||||||
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corr24: '0'
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||||||
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corr25: '0'
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||||||
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corr26: '0'
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||||||
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corr27: '0'
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||||||
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corr28: '0'
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||||||
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corr29: '0'
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||||||
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corr3: '0'
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||||||
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corr30: '0'
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||||||
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corr31: '0'
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||||||
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corr4: '0'
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||||||
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corr5: '0'
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||||||
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corr6: '0'
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||||||
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corr7: '0'
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||||||
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corr8: '0'
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||||||
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corr9: '0'
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||||||
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dc_offset_mode0: '0'
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||||||
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dc_offset_mode1: '0'
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||||||
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dc_offset_mode10: '0'
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||||||
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dc_offset_mode11: '0'
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||||||
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dc_offset_mode12: '0'
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||||||
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dc_offset_mode13: '0'
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||||||
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dc_offset_mode14: '0'
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||||||
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dc_offset_mode15: '0'
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||||||
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dc_offset_mode16: '0'
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||||||
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dc_offset_mode17: '0'
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||||||
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dc_offset_mode18: '0'
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||||||
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dc_offset_mode19: '0'
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||||||
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dc_offset_mode2: '0'
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||||||
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dc_offset_mode20: '0'
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dc_offset_mode21: '0'
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||||||
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dc_offset_mode22: '0'
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||||||
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dc_offset_mode23: '0'
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||||||
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dc_offset_mode24: '0'
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||||||
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dc_offset_mode25: '0'
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||||||
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dc_offset_mode26: '0'
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dc_offset_mode27: '0'
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dc_offset_mode28: '0'
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||||||
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dc_offset_mode29: '0'
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||||||
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dc_offset_mode3: '0'
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dc_offset_mode30: '0'
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dc_offset_mode31: '0'
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dc_offset_mode4: '0'
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dc_offset_mode5: '0'
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dc_offset_mode6: '0'
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dc_offset_mode7: '0'
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dc_offset_mode8: '0'
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dc_offset_mode9: '0'
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freq0: 101.1e6
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freq1: 100e6
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freq10: 100e6
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freq11: 100e6
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freq12: 100e6
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freq13: 100e6
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freq14: 100e6
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freq15: 100e6
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freq16: 100e6
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freq17: 100e6
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freq18: 100e6
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freq19: 100e6
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freq2: 100e6
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freq20: 100e6
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freq21: 100e6
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freq22: 100e6
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freq23: 100e6
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freq24: 100e6
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freq25: 100e6
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freq26: 100e6
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freq27: 100e6
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freq28: 100e6
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freq29: 100e6
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freq3: 100e6
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freq30: 100e6
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freq31: 100e6
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freq4: 100e6
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freq5: 100e6
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freq6: 100e6
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freq7: 100e6
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freq8: 100e6
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freq9: 100e6
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gain0: '40'
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gain1: '10'
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gain10: '10'
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gain11: '10'
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gain12: '10'
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gain13: '10'
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gain14: '10'
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gain15: '10'
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gain16: '10'
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gain17: '10'
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gain18: '10'
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gain19: '10'
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gain2: '10'
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gain20: '10'
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gain21: '10'
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gain22: '10'
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gain23: '10'
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gain24: '10'
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gain25: '10'
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gain26: '10'
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gain27: '10'
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gain28: '10'
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gain29: '10'
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gain3: '10'
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gain30: '10'
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gain31: '10'
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gain4: '10'
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gain5: '10'
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gain6: '10'
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gain7: '10'
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gain8: '10'
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gain9: '10'
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gain_mode0: 'False'
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gain_mode1: 'False'
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gain_mode10: 'False'
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gain_mode11: 'False'
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gain_mode12: 'False'
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gain_mode13: 'False'
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gain_mode14: 'False'
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gain_mode15: 'False'
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gain_mode16: 'False'
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gain_mode17: 'False'
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gain_mode18: 'False'
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gain_mode19: 'False'
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gain_mode2: 'False'
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gain_mode20: 'False'
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gain_mode21: 'False'
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gain_mode22: 'False'
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gain_mode23: 'False'
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gain_mode24: 'False'
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gain_mode25: 'False'
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gain_mode26: 'False'
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gain_mode27: 'False'
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gain_mode28: 'False'
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gain_mode29: 'False'
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gain_mode3: 'False'
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gain_mode30: 'False'
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gain_mode31: 'False'
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gain_mode4: 'False'
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gain_mode5: 'False'
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gain_mode6: 'False'
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gain_mode7: 'False'
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gain_mode8: 'False'
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gain_mode9: 'False'
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if_gain0: '20'
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if_gain1: '20'
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if_gain10: '20'
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if_gain11: '20'
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if_gain12: '20'
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if_gain13: '20'
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if_gain14: '20'
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if_gain15: '20'
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if_gain16: '20'
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if_gain17: '20'
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if_gain18: '20'
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if_gain19: '20'
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if_gain2: '20'
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if_gain20: '20'
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if_gain21: '20'
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if_gain22: '20'
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if_gain23: '20'
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if_gain24: '20'
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if_gain25: '20'
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if_gain26: '20'
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if_gain27: '20'
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if_gain28: '20'
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if_gain29: '20'
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if_gain3: '20'
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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: 2.4e6
|
||||||
|
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
|
||||||
|
state: enabled
|
||||||
|
- name: xmlrpc_server_0
|
||||||
|
id: xmlrpc_server
|
||||||
|
parameters:
|
||||||
|
addr: 0.0.0.0
|
||||||
|
alias: ''
|
||||||
|
comment: ''
|
||||||
|
port: '8090'
|
||||||
|
states:
|
||||||
|
bus_sink: false
|
||||||
|
bus_source: false
|
||||||
|
bus_structure: null
|
||||||
|
state: enabled
|
||||||
|
|
||||||
|
connections:
|
||||||
|
- [analog_wfm_rcv_1, '0', blocks_wavfile_sink_0, '0']
|
||||||
|
- [low_pass_filter_1, '0', analog_wfm_rcv_1, '0']
|
||||||
|
- [osmosdr_source_1, '0', low_pass_filter_1, '0']
|
||||||
|
|
||||||
|
metadata:
|
||||||
|
file_format: 1
|
||||||
|
grc_version: 3.10.12.0
|
||||||
BIN
examples/fm_101_1_recording.wav
Normal file
BIN
examples/fm_101_1_recording.wav
Normal file
Binary file not shown.
387
examples/fm_receiver.py
Normal file
387
examples/fm_receiver.py
Normal file
@ -0,0 +1,387 @@
|
|||||||
|
#!/usr/bin/env python3
|
||||||
|
"""
|
||||||
|
FM Receiver Flowgraph Builder using gr-mcp
|
||||||
|
|
||||||
|
This script uses gr-mcp's MCP tools to programmatically build a Wideband FM
|
||||||
|
receiver flowgraph that:
|
||||||
|
- Receives RF from an RTL-SDR dongle (or simulated source)
|
||||||
|
- Demodulates FM audio
|
||||||
|
- Outputs to speakers
|
||||||
|
|
||||||
|
Signal Chain:
|
||||||
|
RTL-SDR Source (2.4 MHz) → Low Pass Filter → WBFM Demod → Audio Sink
|
||||||
|
↓ ↓ ↓ ↓
|
||||||
|
88-108 MHz Anti-alias Demodulate Speakers
|
||||||
|
complex IQ 200 kHz BW to audio
|
||||||
|
"""
|
||||||
|
|
||||||
|
import asyncio
|
||||||
|
import sys
|
||||||
|
from pathlib import Path
|
||||||
|
|
||||||
|
from fastmcp import Client
|
||||||
|
|
||||||
|
# Add project root to path for imports
|
||||||
|
sys.path.insert(0, str(Path(__file__).parent.parent))
|
||||||
|
|
||||||
|
from main import app as mcp_app
|
||||||
|
|
||||||
|
|
||||||
|
async def find_blocks_matching(client: Client, patterns: list[str]) -> dict[str, str]:
|
||||||
|
"""Search available blocks for ones matching the given patterns."""
|
||||||
|
result = await client.call_tool(name="get_all_available_blocks")
|
||||||
|
available = result.data
|
||||||
|
|
||||||
|
matches = {}
|
||||||
|
for pattern in patterns:
|
||||||
|
for block in available:
|
||||||
|
if pattern.lower() in block.key.lower():
|
||||||
|
if pattern not in matches:
|
||||||
|
matches[pattern] = block.key
|
||||||
|
break
|
||||||
|
return matches
|
||||||
|
|
||||||
|
|
||||||
|
async def build_fm_receiver(
|
||||||
|
client: Client,
|
||||||
|
freq_mhz: float = 99.5,
|
||||||
|
output_path: str = "/tmp/fm_receiver.grc",
|
||||||
|
use_simulation: bool = False,
|
||||||
|
):
|
||||||
|
"""
|
||||||
|
Build an FM receiver flowgraph.
|
||||||
|
|
||||||
|
Args:
|
||||||
|
client: FastMCP client connected to gr-mcp
|
||||||
|
freq_mhz: FM station frequency in MHz (default 99.5)
|
||||||
|
output_path: Where to save the .grc file
|
||||||
|
use_simulation: If True, use signal source instead of RTL-SDR
|
||||||
|
"""
|
||||||
|
print(f"\n{'='*60}")
|
||||||
|
print(f"Building FM Receiver for {freq_mhz} MHz")
|
||||||
|
print(f"{'='*60}\n")
|
||||||
|
|
||||||
|
# Step 1: Find available blocks
|
||||||
|
print("Step 1: Checking available blocks...")
|
||||||
|
result = await client.call_tool(name="get_all_available_blocks")
|
||||||
|
available_blocks = {b.key: b for b in result.data}
|
||||||
|
|
||||||
|
# Check for SDR source options
|
||||||
|
sdr_sources = ["osmosdr_source", "soapy_source", "rtlsdr_source"]
|
||||||
|
found_sdr = None
|
||||||
|
for src in sdr_sources:
|
||||||
|
if src in available_blocks:
|
||||||
|
found_sdr = src
|
||||||
|
print(f" ✓ Found SDR source: {src}")
|
||||||
|
break
|
||||||
|
|
||||||
|
if not found_sdr and not use_simulation:
|
||||||
|
print(" ⚠ No SDR source found (osmosdr, soapy, rtlsdr)")
|
||||||
|
print(" Using simulation mode with analog_sig_source_x")
|
||||||
|
use_simulation = True
|
||||||
|
|
||||||
|
# Check for required blocks
|
||||||
|
required = ["low_pass_filter", "analog_wfm_rcv", "audio_sink"]
|
||||||
|
for block_key in required:
|
||||||
|
if block_key in available_blocks:
|
||||||
|
print(f" ✓ Found: {block_key}")
|
||||||
|
else:
|
||||||
|
# Try partial match
|
||||||
|
matches = [k for k in available_blocks if block_key in k]
|
||||||
|
if matches:
|
||||||
|
print(f" ✓ Found (partial): {matches[0]}")
|
||||||
|
else:
|
||||||
|
print(f" ✗ Missing: {block_key}")
|
||||||
|
|
||||||
|
# Step 2: Create the blocks
|
||||||
|
print("\nStep 2: Creating blocks...")
|
||||||
|
blocks = {}
|
||||||
|
|
||||||
|
# Source block
|
||||||
|
if use_simulation:
|
||||||
|
result = await client.call_tool(
|
||||||
|
name="make_block", arguments={"block_name": "analog_sig_source_x"}
|
||||||
|
)
|
||||||
|
blocks["source"] = str(result.data)
|
||||||
|
print(f" Created simulation source: {blocks['source']}")
|
||||||
|
else:
|
||||||
|
result = await client.call_tool(
|
||||||
|
name="make_block", arguments={"block_name": found_sdr}
|
||||||
|
)
|
||||||
|
blocks["source"] = str(result.data)
|
||||||
|
print(f" Created SDR source: {blocks['source']}")
|
||||||
|
|
||||||
|
# Low pass filter
|
||||||
|
result = await client.call_tool(
|
||||||
|
name="make_block", arguments={"block_name": "low_pass_filter"}
|
||||||
|
)
|
||||||
|
blocks["lpf"] = str(result.data)
|
||||||
|
print(f" Created low pass filter: {blocks['lpf']}")
|
||||||
|
|
||||||
|
# WFM (Wideband FM) demodulator
|
||||||
|
result = await client.call_tool(
|
||||||
|
name="make_block", arguments={"block_name": "analog_wfm_rcv"}
|
||||||
|
)
|
||||||
|
blocks["wfm"] = str(result.data)
|
||||||
|
print(f" Created WFM demod: {blocks['wfm']}")
|
||||||
|
|
||||||
|
# Audio sink
|
||||||
|
result = await client.call_tool(
|
||||||
|
name="make_block", arguments={"block_name": "audio_sink"}
|
||||||
|
)
|
||||||
|
blocks["audio"] = str(result.data)
|
||||||
|
print(f" Created audio sink: {blocks['audio']}")
|
||||||
|
|
||||||
|
# Step 3: Configure block parameters
|
||||||
|
print("\nStep 3: Configuring block parameters...")
|
||||||
|
|
||||||
|
freq_hz = freq_mhz * 1e6
|
||||||
|
samp_rate = 2.4e6 # 2.4 MHz sample rate
|
||||||
|
audio_rate = 48000 # 48 kHz audio
|
||||||
|
|
||||||
|
if use_simulation:
|
||||||
|
# Configure simulation source (complex sine wave at FM frequency)
|
||||||
|
# Using GRC parameter keys (not display names) from inspect_blocks.py
|
||||||
|
await client.call_tool(
|
||||||
|
name="set_block_params",
|
||||||
|
arguments={
|
||||||
|
"block_name": blocks["source"],
|
||||||
|
"params": {
|
||||||
|
"type": "complex",
|
||||||
|
"samp_rate": str(samp_rate),
|
||||||
|
"freq": "1000", # 1 kHz tone offset
|
||||||
|
"amp": "1",
|
||||||
|
"offset": "0",
|
||||||
|
"waveform": "analog.GR_COS_WAVE",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
)
|
||||||
|
print(f" Configured simulation source (complex, {samp_rate/1e6} MHz)")
|
||||||
|
else:
|
||||||
|
# Configure RTL-SDR/OsmoSDR source
|
||||||
|
# Using GRC parameter keys (not display names) from inspect_blocks.py
|
||||||
|
await client.call_tool(
|
||||||
|
name="set_block_params",
|
||||||
|
arguments={
|
||||||
|
"block_name": blocks["source"],
|
||||||
|
"params": {
|
||||||
|
"type": "fc32",
|
||||||
|
"args": '"rtl=0"',
|
||||||
|
"sample_rate": str(samp_rate),
|
||||||
|
"freq0": str(freq_hz),
|
||||||
|
"gain0": "40",
|
||||||
|
"if_gain0": "20",
|
||||||
|
"bb_gain0": "20",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
)
|
||||||
|
print(f" Configured SDR source: {freq_mhz} MHz, {samp_rate/1e6} MS/s")
|
||||||
|
|
||||||
|
# Configure low pass filter
|
||||||
|
# Decimation: 2.4M → 480k (factor of 5)
|
||||||
|
# Using GRC parameter keys (not display names) from inspect_blocks.py
|
||||||
|
await client.call_tool(
|
||||||
|
name="set_block_params",
|
||||||
|
arguments={
|
||||||
|
"block_name": blocks["lpf"],
|
||||||
|
"params": {
|
||||||
|
"type": "fir_filter_ccf",
|
||||||
|
"decim": "5",
|
||||||
|
"gain": "1",
|
||||||
|
"samp_rate": str(samp_rate),
|
||||||
|
"cutoff_freq": "100e3", # 100 kHz cutoff
|
||||||
|
"width": "10e3", # 10 kHz transition width
|
||||||
|
"win": "window.WIN_HAMMING",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
)
|
||||||
|
print(" Configured LPF: 100 kHz cutoff, 5x decimation → 480 kHz")
|
||||||
|
|
||||||
|
# Configure WFM demodulator
|
||||||
|
# Input rate: 480 kHz, audio decimation: 10 → 48 kHz audio
|
||||||
|
# Using GRC parameter keys (not display names) from inspect_blocks.py
|
||||||
|
await client.call_tool(
|
||||||
|
name="set_block_params",
|
||||||
|
arguments={
|
||||||
|
"block_name": blocks["wfm"],
|
||||||
|
"params": {
|
||||||
|
"quad_rate": "480e3", # 480 kHz input rate
|
||||||
|
"audio_decimation": "10", # → 48 kHz output
|
||||||
|
},
|
||||||
|
},
|
||||||
|
)
|
||||||
|
print(" Configured WFM: quad_rate=480k, audio_dec=10 → 48 kHz")
|
||||||
|
|
||||||
|
# Configure audio sink
|
||||||
|
# Using GRC parameter keys (not display names) from inspect_blocks.py
|
||||||
|
await client.call_tool(
|
||||||
|
name="set_block_params",
|
||||||
|
arguments={
|
||||||
|
"block_name": blocks["audio"],
|
||||||
|
"params": {
|
||||||
|
"samp_rate": str(audio_rate),
|
||||||
|
"device_name": "", # Default audio device
|
||||||
|
"ok_to_block": "True",
|
||||||
|
"num_inputs": "1",
|
||||||
|
},
|
||||||
|
},
|
||||||
|
)
|
||||||
|
print(f" Configured audio sink: {audio_rate} Hz")
|
||||||
|
|
||||||
|
# Step 4: Check block ports before connecting
|
||||||
|
print("\nStep 4: Checking block ports...")
|
||||||
|
for name, block_name in blocks.items():
|
||||||
|
sources = await client.call_tool(
|
||||||
|
name="get_block_sources", arguments={"block_name": block_name}
|
||||||
|
)
|
||||||
|
sinks = await client.call_tool(
|
||||||
|
name="get_block_sinks", arguments={"block_name": block_name}
|
||||||
|
)
|
||||||
|
src_count = len(sources.data) if sources.data else 0
|
||||||
|
sink_count = len(sinks.data) if sinks.data else 0
|
||||||
|
print(f" {name} ({block_name}): {src_count} source(s), {sink_count} sink(s)")
|
||||||
|
|
||||||
|
# Step 5: Connect the signal chain
|
||||||
|
print("\nStep 5: Connecting signal chain...")
|
||||||
|
|
||||||
|
# Source → Low Pass Filter
|
||||||
|
await client.call_tool(
|
||||||
|
name="connect_blocks",
|
||||||
|
arguments={
|
||||||
|
"source_block_name": blocks["source"],
|
||||||
|
"sink_block_name": blocks["lpf"],
|
||||||
|
"source_port_name": "0",
|
||||||
|
"sink_port_name": "0",
|
||||||
|
},
|
||||||
|
)
|
||||||
|
print(f" {blocks['source']}:0 → {blocks['lpf']}:0")
|
||||||
|
|
||||||
|
# Low Pass Filter → WBFM Demod
|
||||||
|
await client.call_tool(
|
||||||
|
name="connect_blocks",
|
||||||
|
arguments={
|
||||||
|
"source_block_name": blocks["lpf"],
|
||||||
|
"sink_block_name": blocks["wfm"],
|
||||||
|
"source_port_name": "0",
|
||||||
|
"sink_port_name": "0",
|
||||||
|
},
|
||||||
|
)
|
||||||
|
print(f" {blocks['lpf']}:0 → {blocks['wfm']}:0")
|
||||||
|
|
||||||
|
# WBFM Demod → Audio Sink
|
||||||
|
await client.call_tool(
|
||||||
|
name="connect_blocks",
|
||||||
|
arguments={
|
||||||
|
"source_block_name": blocks["wfm"],
|
||||||
|
"sink_block_name": blocks["audio"],
|
||||||
|
"source_port_name": "0",
|
||||||
|
"sink_port_name": "0",
|
||||||
|
},
|
||||||
|
)
|
||||||
|
print(f" {blocks['wfm']}:0 → {blocks['audio']}:0")
|
||||||
|
|
||||||
|
# Step 6: Validate the flowgraph
|
||||||
|
print("\nStep 6: Validating flowgraph...")
|
||||||
|
valid = await client.call_tool(name="validate_flowgraph")
|
||||||
|
if valid.data:
|
||||||
|
print(" ✓ Flowgraph is valid")
|
||||||
|
else:
|
||||||
|
print(" ✗ Flowgraph has errors:")
|
||||||
|
errors = await client.call_tool(name="get_all_errors")
|
||||||
|
for err in errors.data:
|
||||||
|
print(f" - {err}")
|
||||||
|
|
||||||
|
# Step 7: Get all connections for verification
|
||||||
|
print("\nStep 7: Verifying connections...")
|
||||||
|
conns = await client.call_tool(name="get_connections")
|
||||||
|
for conn in conns.data:
|
||||||
|
# ConnectionModel has source/sink PortModels with parent (block) and key (port)
|
||||||
|
print(
|
||||||
|
f" {conn.source.parent}:{conn.source.key} → "
|
||||||
|
f"{conn.sink.parent}:{conn.sink.key}"
|
||||||
|
)
|
||||||
|
|
||||||
|
# Step 8: Save the flowgraph
|
||||||
|
print(f"\nStep 8: Saving flowgraph to {output_path}...")
|
||||||
|
await client.call_tool(
|
||||||
|
name="save_flowgraph", arguments={"filepath": output_path}
|
||||||
|
)
|
||||||
|
print(f" ✓ Saved to {output_path}")
|
||||||
|
|
||||||
|
# Summary
|
||||||
|
print(f"\n{'='*60}")
|
||||||
|
print("FM Receiver Flowgraph Complete!")
|
||||||
|
print(f"{'='*60}")
|
||||||
|
print(f" Frequency: {freq_mhz} MHz")
|
||||||
|
print(f" Sample Rate: {samp_rate/1e6} MS/s")
|
||||||
|
print(f" Audio Rate: {audio_rate} Hz")
|
||||||
|
print(f" Output: {output_path}")
|
||||||
|
if use_simulation:
|
||||||
|
print(" Mode: SIMULATION (no RTL-SDR)")
|
||||||
|
else:
|
||||||
|
print(" Mode: RTL-SDR")
|
||||||
|
print()
|
||||||
|
|
||||||
|
return blocks
|
||||||
|
|
||||||
|
|
||||||
|
async def list_all_blocks(client: Client, filter_pattern: str = None):
|
||||||
|
"""List all available GNU Radio blocks, optionally filtered."""
|
||||||
|
result = await client.call_tool(name="get_all_available_blocks")
|
||||||
|
blocks = sorted(result.data, key=lambda b: b.key)
|
||||||
|
|
||||||
|
if filter_pattern:
|
||||||
|
blocks = [b for b in blocks if filter_pattern.lower() in b.key.lower()]
|
||||||
|
|
||||||
|
print(f"\nAvailable blocks ({len(blocks)} total):")
|
||||||
|
for block in blocks:
|
||||||
|
print(f" {block.key}")
|
||||||
|
|
||||||
|
return blocks
|
||||||
|
|
||||||
|
|
||||||
|
async def main():
|
||||||
|
"""Main entry point."""
|
||||||
|
import argparse
|
||||||
|
|
||||||
|
parser = argparse.ArgumentParser(description="Build FM Receiver with gr-mcp")
|
||||||
|
parser.add_argument(
|
||||||
|
"--freq", type=float, default=99.5, help="FM frequency in MHz (default: 99.5)"
|
||||||
|
)
|
||||||
|
parser.add_argument(
|
||||||
|
"--output",
|
||||||
|
type=str,
|
||||||
|
default="/tmp/fm_receiver.grc",
|
||||||
|
help="Output .grc file path",
|
||||||
|
)
|
||||||
|
parser.add_argument(
|
||||||
|
"--simulate",
|
||||||
|
action="store_true",
|
||||||
|
help="Use simulated source instead of RTL-SDR",
|
||||||
|
)
|
||||||
|
parser.add_argument(
|
||||||
|
"--list-blocks",
|
||||||
|
type=str,
|
||||||
|
nargs="?",
|
||||||
|
const="",
|
||||||
|
help="List available blocks (optionally filter by pattern)",
|
||||||
|
)
|
||||||
|
|
||||||
|
args = parser.parse_args()
|
||||||
|
|
||||||
|
async with Client(mcp_app) as client:
|
||||||
|
if args.list_blocks is not None:
|
||||||
|
await list_all_blocks(
|
||||||
|
client, args.list_blocks if args.list_blocks else None
|
||||||
|
)
|
||||||
|
else:
|
||||||
|
await build_fm_receiver(
|
||||||
|
client,
|
||||||
|
freq_mhz=args.freq,
|
||||||
|
output_path=args.output,
|
||||||
|
use_simulation=args.simulate,
|
||||||
|
)
|
||||||
|
|
||||||
|
|
||||||
|
if __name__ == "__main__":
|
||||||
|
asyncio.run(main())
|
||||||
75
examples/inspect_blocks.py
Normal file
75
examples/inspect_blocks.py
Normal file
@ -0,0 +1,75 @@
|
|||||||
|
#!/usr/bin/env python3
|
||||||
|
"""Inspect block parameters for FM receiver blocks."""
|
||||||
|
|
||||||
|
import asyncio
|
||||||
|
import sys
|
||||||
|
from pathlib import Path
|
||||||
|
|
||||||
|
sys.path.insert(0, str(Path(__file__).parent.parent))
|
||||||
|
|
||||||
|
from fastmcp import Client
|
||||||
|
from main import app as mcp_app
|
||||||
|
|
||||||
|
|
||||||
|
async def inspect_block(client: Client, block_key: str):
|
||||||
|
"""Create a block and show its parameters."""
|
||||||
|
print(f"\n{'='*60}")
|
||||||
|
print(f"Block: {block_key}")
|
||||||
|
print(f"{'='*60}")
|
||||||
|
|
||||||
|
# Create the block
|
||||||
|
result = await client.call_tool(
|
||||||
|
name="make_block", arguments={"block_name": block_key}
|
||||||
|
)
|
||||||
|
block_name = str(result.data)
|
||||||
|
print(f"Created: {block_name}")
|
||||||
|
|
||||||
|
# Get parameters
|
||||||
|
params = await client.call_tool(
|
||||||
|
name="get_block_params", arguments={"block_name": block_name}
|
||||||
|
)
|
||||||
|
|
||||||
|
print("\nParameters (key -> display name):")
|
||||||
|
for param in params.data:
|
||||||
|
print(f" {param.key}: {param.value!r}")
|
||||||
|
print(f" name: {param.name}")
|
||||||
|
print(f" type: {param.dtype}")
|
||||||
|
|
||||||
|
# Get sources (outputs)
|
||||||
|
sources = await client.call_tool(
|
||||||
|
name="get_block_sources", arguments={"block_name": block_name}
|
||||||
|
)
|
||||||
|
print("\nSources (outputs):")
|
||||||
|
for port in sources.data:
|
||||||
|
print(f" [{port.key}] {port.name} ({port.dtype})")
|
||||||
|
|
||||||
|
# Get sinks (inputs)
|
||||||
|
sinks = await client.call_tool(
|
||||||
|
name="get_block_sinks", arguments={"block_name": block_name}
|
||||||
|
)
|
||||||
|
print("\nSinks (inputs):")
|
||||||
|
for port in sinks.data:
|
||||||
|
print(f" [{port.key}] {port.name} ({port.dtype})")
|
||||||
|
|
||||||
|
return block_name
|
||||||
|
|
||||||
|
|
||||||
|
async def main():
|
||||||
|
blocks_to_inspect = [
|
||||||
|
"osmosdr_source",
|
||||||
|
"low_pass_filter",
|
||||||
|
"analog_wfm_rcv",
|
||||||
|
"audio_sink",
|
||||||
|
"analog_sig_source_x",
|
||||||
|
]
|
||||||
|
|
||||||
|
async with Client(mcp_app) as client:
|
||||||
|
for block_key in blocks_to_inspect:
|
||||||
|
try:
|
||||||
|
await inspect_block(client, block_key)
|
||||||
|
except Exception as e:
|
||||||
|
print(f"\nError inspecting {block_key}: {e}")
|
||||||
|
|
||||||
|
|
||||||
|
if __name__ == "__main__":
|
||||||
|
asyncio.run(main())
|
||||||
Loading…
x
Reference in New Issue
Block a user