feat: add MCP-built LoRa receiver with RTL-SDR live decode
LoRa receiver flowgraph built entirely through gr-mcp MCP tools. Successfully decodes live packets from Heltec V3 beacon at 915MHz, SF7, BW125k via RTL-SDR. Signal chain: osmosdr(1MSPS) → LPF(200kHz, dec×2) → lora_rx(500kSPS) → message_debug Key settings for RTL-SDR live reception: - DC offset auto-correction (mode=2) to remove DC spike at center freq - IQ balance auto-correction (mode=2) - signal.pause() fallback for Docker detached mode - XML-RPC on 0.0.0.0 for Docker host accessibility
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511
examples/lora_rx_mcp.grc
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511
examples/lora_rx_mcp.grc
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@ -0,0 +1,511 @@
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options:
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parameters:
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author: gr-mcp
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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: 'LoRa receiver built entirely through MCP tools. Matches Heltec V3
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beacon: 915MHz, SF7, BW125k.'
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gen_cmake: 'On'
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gen_linking: dynamic
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generate_options: no_gui
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hier_block_src_path: '.:'
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id: lora_rx_mcp
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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: LoRa SDR Receiver (MCP-built)
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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: center_freq
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id: variable
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parameters:
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comment: ''
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value: 915e6
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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: lora_bw
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id: variable
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parameters:
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comment: ''
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value: '125000'
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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: lora_sf
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id: variable
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parameters:
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comment: ''
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value: '7'
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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: '1000000'
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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_message_debug_0
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id: blocks_message_debug
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parameters:
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affinity: ''
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alias: ''
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comment: ''
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en_uvec: 'True'
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log_level: info
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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: lora_rx_0
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id: lora_rx
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parameters:
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affinity: ''
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alias: ''
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bw: lora_bw
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comment: ''
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cr: '1'
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has_crc: 'True'
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impl_head: 'False'
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ldro: '2'
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maxoutbuf: '0'
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minoutbuf: '0'
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pay_len: '255'
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print_rx: '[True,True]'
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samp_rate: int(samp_rate/2)
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sf: lora_sf
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soft_decoding: 'True'
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sync_word: '[0x12]'
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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_0
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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: 200e3
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decim: '2'
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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: samp_rate
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type: fir_filter_ccf
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width: 50e3
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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_0
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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: lora_bw
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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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bw16: '0'
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bw17: '0'
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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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bw22: '0'
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bw23: '0'
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bw24: '0'
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bw25: '0'
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bw26: '0'
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bw27: '0'
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bw28: '0'
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bw29: '0'
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bw3: '0'
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bw30: '0'
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bw31: '0'
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bw4: '0'
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bw5: '0'
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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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corr10: '0'
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corr11: '0'
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corr12: '0'
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corr13: '0'
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corr14: '0'
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corr15: '0'
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corr16: '0'
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corr17: '0'
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corr18: '0'
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corr19: '0'
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corr2: '0'
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corr20: '0'
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corr21: '0'
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corr22: '0'
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corr23: '0'
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corr24: '0'
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corr25: '0'
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corr26: '0'
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corr27: '0'
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corr28: '0'
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corr29: '0'
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corr3: '0'
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corr30: '0'
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corr31: '0'
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corr4: '0'
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corr5: '0'
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corr6: '0'
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corr7: '0'
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corr8: '0'
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corr9: '0'
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dc_offset_mode0: '0'
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dc_offset_mode1: '0'
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dc_offset_mode10: '0'
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dc_offset_mode11: '0'
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dc_offset_mode12: '0'
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dc_offset_mode13: '0'
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dc_offset_mode14: '0'
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dc_offset_mode15: '0'
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dc_offset_mode16: '0'
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dc_offset_mode17: '0'
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dc_offset_mode18: '0'
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dc_offset_mode19: '0'
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dc_offset_mode2: '0'
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dc_offset_mode20: '0'
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dc_offset_mode21: '0'
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dc_offset_mode22: '0'
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dc_offset_mode23: '0'
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dc_offset_mode24: '0'
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dc_offset_mode25: '0'
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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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dc_offset_mode29: '0'
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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: center_freq
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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: '40'
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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'
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if_gain31: '20'
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if_gain4: '20'
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if_gain5: '20'
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if_gain6: '20'
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if_gain7: '20'
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if_gain8: '20'
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if_gain9: '20'
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iq_balance_mode0: '0'
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iq_balance_mode1: '0'
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iq_balance_mode10: '0'
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iq_balance_mode11: '0'
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iq_balance_mode12: '0'
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iq_balance_mode13: '0'
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iq_balance_mode14: '0'
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iq_balance_mode15: '0'
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iq_balance_mode16: '0'
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iq_balance_mode17: '0'
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iq_balance_mode18: '0'
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iq_balance_mode19: '0'
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iq_balance_mode2: '0'
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iq_balance_mode20: '0'
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iq_balance_mode21: '0'
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iq_balance_mode22: '0'
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iq_balance_mode23: '0'
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iq_balance_mode24: '0'
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||||
iq_balance_mode25: '0'
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iq_balance_mode26: '0'
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iq_balance_mode27: '0'
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iq_balance_mode28: '0'
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iq_balance_mode29: '0'
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iq_balance_mode3: '0'
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iq_balance_mode30: '0'
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iq_balance_mode31: '0'
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iq_balance_mode4: '0'
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iq_balance_mode5: '0'
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iq_balance_mode6: '0'
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iq_balance_mode7: '0'
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iq_balance_mode8: '0'
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iq_balance_mode9: '0'
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maxoutbuf: '0'
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minoutbuf: '0'
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nchan: '1'
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num_mboards: '1'
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sample_rate: samp_rate
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sync: sync
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time_source0: ''
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time_source1: ''
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time_source2: ''
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time_source3: ''
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time_source4: ''
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time_source5: ''
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time_source6: ''
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time_source7: ''
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type: fc32
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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: xmlrpc_server_0
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id: xmlrpc_server
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parameters:
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addr: localhost
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||||
alias: ''
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||||
comment: ''
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||||
port: '8080'
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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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||||
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connections:
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- [lora_rx_0, out, blocks_message_debug_0, print]
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- [low_pass_filter_0, '0', lora_rx_0, '0']
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- [osmosdr_source_0, '0', low_pass_filter_0, '0']
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||||
|
||||
metadata:
|
||||
file_format: 1
|
||||
grc_version: 3.10.12.0
|
||||
152
examples/lora_rx_mcp.py
Executable file
152
examples/lora_rx_mcp.py
Executable file
@ -0,0 +1,152 @@
|
||||
#!/usr/bin/env python3
|
||||
# -*- coding: utf-8 -*-
|
||||
|
||||
#
|
||||
# SPDX-License-Identifier: GPL-3.0
|
||||
#
|
||||
# GNU Radio Python Flow Graph
|
||||
# Title: LoRa SDR Receiver (MCP-built)
|
||||
# Author: gr-mcp
|
||||
# Description: LoRa receiver built entirely through MCP tools. Matches Heltec V3 beacon: 915MHz, SF7, BW125k.
|
||||
# GNU Radio version: 3.10.12.0
|
||||
|
||||
from gnuradio import blocks, gr
|
||||
from gnuradio import filter
|
||||
from gnuradio.filter import firdes
|
||||
from gnuradio import gr
|
||||
from gnuradio.fft import window
|
||||
import sys
|
||||
import signal
|
||||
from argparse import ArgumentParser
|
||||
from gnuradio.eng_arg import eng_float, intx
|
||||
from gnuradio import eng_notation
|
||||
from xmlrpc.server import SimpleXMLRPCServer
|
||||
import threading
|
||||
import gnuradio.lora_sdr as lora_sdr
|
||||
import osmosdr
|
||||
import time
|
||||
|
||||
|
||||
|
||||
|
||||
class lora_rx_mcp(gr.top_block):
|
||||
|
||||
def __init__(self):
|
||||
gr.top_block.__init__(self, "LoRa SDR Receiver (MCP-built)", catch_exceptions=True)
|
||||
self.flowgraph_started = threading.Event()
|
||||
|
||||
##################################################
|
||||
# Variables
|
||||
##################################################
|
||||
self.samp_rate = samp_rate = 1000000
|
||||
self.lora_sf = lora_sf = 7
|
||||
self.lora_bw = lora_bw = 125000
|
||||
self.center_freq = center_freq = 915e6
|
||||
|
||||
##################################################
|
||||
# Blocks
|
||||
##################################################
|
||||
|
||||
self.xmlrpc_server_0 = SimpleXMLRPCServer(('0.0.0.0', 8080), allow_none=True)
|
||||
self.xmlrpc_server_0.register_instance(self)
|
||||
self.xmlrpc_server_0_thread = threading.Thread(target=self.xmlrpc_server_0.serve_forever)
|
||||
self.xmlrpc_server_0_thread.daemon = True
|
||||
self.xmlrpc_server_0_thread.start()
|
||||
self.osmosdr_source_0 = osmosdr.source(
|
||||
args="numchan=" + str(1) + " " + 'rtl=0'
|
||||
)
|
||||
self.osmosdr_source_0.set_time_unknown_pps(osmosdr.time_spec_t())
|
||||
self.osmosdr_source_0.set_sample_rate(samp_rate)
|
||||
self.osmosdr_source_0.set_center_freq(center_freq, 0)
|
||||
self.osmosdr_source_0.set_freq_corr(0, 0)
|
||||
self.osmosdr_source_0.set_dc_offset_mode(2, 0)
|
||||
self.osmosdr_source_0.set_iq_balance_mode(2, 0)
|
||||
self.osmosdr_source_0.set_gain_mode(False, 0)
|
||||
self.osmosdr_source_0.set_gain(40, 0)
|
||||
self.osmosdr_source_0.set_if_gain(20, 0)
|
||||
self.osmosdr_source_0.set_bb_gain(20, 0)
|
||||
self.osmosdr_source_0.set_antenna('', 0)
|
||||
self.osmosdr_source_0.set_bandwidth(0, 0)
|
||||
self.low_pass_filter_0 = filter.fir_filter_ccf(
|
||||
2,
|
||||
firdes.low_pass(
|
||||
1,
|
||||
samp_rate,
|
||||
200e3,
|
||||
50e3,
|
||||
window.WIN_HAMMING,
|
||||
6.76))
|
||||
self.lora_rx_0 = lora_sdr.lora_sdr_lora_rx( bw=lora_bw, cr=1, has_crc=True, impl_head=False, pay_len=255, samp_rate=(int(samp_rate/2)), sf=lora_sf, sync_word=[0x12], soft_decoding=True, ldro_mode=2, print_rx=[True,True])
|
||||
self.blocks_message_debug_0 = blocks.message_debug(True)
|
||||
|
||||
|
||||
##################################################
|
||||
# Connections
|
||||
##################################################
|
||||
self.msg_connect((self.lora_rx_0, 'out'), (self.blocks_message_debug_0, 'print'))
|
||||
self.connect((self.low_pass_filter_0, 0), (self.lora_rx_0, 0))
|
||||
self.connect((self.osmosdr_source_0, 0), (self.low_pass_filter_0, 0))
|
||||
|
||||
|
||||
def get_samp_rate(self):
|
||||
return self.samp_rate
|
||||
|
||||
def set_samp_rate(self, samp_rate):
|
||||
self.samp_rate = samp_rate
|
||||
self.osmosdr_source_0.set_sample_rate(self.samp_rate)
|
||||
self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.samp_rate, 200e3, 50e3, window.WIN_HAMMING, 6.76))
|
||||
|
||||
def get_lora_sf(self):
|
||||
return self.lora_sf
|
||||
|
||||
def set_lora_sf(self, lora_sf):
|
||||
self.lora_sf = lora_sf
|
||||
|
||||
def get_lora_bw(self):
|
||||
return self.lora_bw
|
||||
|
||||
def set_lora_bw(self, lora_bw):
|
||||
self.lora_bw = lora_bw
|
||||
|
||||
def get_center_freq(self):
|
||||
return self.center_freq
|
||||
|
||||
def set_center_freq(self, center_freq):
|
||||
self.center_freq = center_freq
|
||||
self.osmosdr_source_0.set_center_freq(self.center_freq, 0)
|
||||
|
||||
|
||||
|
||||
|
||||
def main(top_block_cls=lora_rx_mcp, options=None):
|
||||
tb = top_block_cls()
|
||||
|
||||
def sig_handler(sig=None, frame=None):
|
||||
tb.stop()
|
||||
tb.wait()
|
||||
|
||||
sys.exit(0)
|
||||
|
||||
signal.signal(signal.SIGINT, sig_handler)
|
||||
signal.signal(signal.SIGTERM, sig_handler)
|
||||
|
||||
tb.start()
|
||||
tb.flowgraph_started.set()
|
||||
|
||||
try:
|
||||
input('Press Enter to quit: ')
|
||||
except EOFError:
|
||||
# No stdin (Docker detached mode) — block on signal instead
|
||||
try:
|
||||
signal.pause()
|
||||
except AttributeError:
|
||||
# signal.pause() not available on Windows
|
||||
import time
|
||||
while True:
|
||||
time.sleep(1)
|
||||
tb.stop()
|
||||
tb.wait()
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
main()
|
||||
Loading…
x
Reference in New Issue
Block a user