Ryan Malloy
e8b3600e60
LoRa receiver flowgraph built programmatically via gr-mcp: - osmosdr_source → low_pass_filter → lora_rx → message_debug - XML-RPC server for runtime variable control (samp_rate, center_freq) with introspection enabled - Qt frequency sink for spectrum visualization Docker infrastructure: - gnuradio-lora: gr-lora_sdr OOT module from EPFL (chirp spread spectrum) - gnuradio-lora-runtime: combined runtime with Xvfb + gr-lora_sdr - Compose file, entrypoint, and launch script for LoRa receiver Also includes: - lora_scanner.py: multi-SF LoRa scanner example - lora_infrastructure_test.py: hardware-free pipeline validation (signal_source → throttle → null_sink + xmlrpc variable control) - Integration tests for LoRa scanner flowgraph construction End-to-end pipeline validated: launch_flowgraph → connect_to_container → list_variables → get/set_variable all working through Docker + XML-RPC.
218 lines
7.7 KiB
Python
Executable File
218 lines
7.7 KiB
Python
Executable File
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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#
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# SPDX-License-Identifier: GPL-3.0
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#
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# GNU Radio Python Flow Graph
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# Title: LoRa SDR Receiver
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# Author: gr-mcp
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# GNU Radio version: 3.10.12.0
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from PyQt5 import Qt
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from gnuradio import qtgui
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from gnuradio import blocks, gr
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from gnuradio import filter
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from gnuradio.filter import firdes
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from gnuradio import gr
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from gnuradio.fft import window
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import sys
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import signal
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from PyQt5 import Qt
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from argparse import ArgumentParser
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from gnuradio.eng_arg import eng_float, intx
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from gnuradio import eng_notation
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from xmlrpc.server import SimpleXMLRPCServer
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import gnuradio.lora_sdr as lora_sdr
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import osmosdr
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import time
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import sip
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import threading
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class default(gr.top_block, Qt.QWidget):
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def __init__(self):
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gr.top_block.__init__(self, "LoRa SDR Receiver", catch_exceptions=True)
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Qt.QWidget.__init__(self)
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self.setWindowTitle("LoRa SDR Receiver")
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qtgui.util.check_set_qss()
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try:
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self.setWindowIcon(Qt.QIcon.fromTheme('gnuradio-grc'))
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except BaseException as exc:
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print(f"Qt GUI: Could not set Icon: {str(exc)}", file=sys.stderr)
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self.top_scroll_layout = Qt.QVBoxLayout()
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self.setLayout(self.top_scroll_layout)
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self.top_scroll = Qt.QScrollArea()
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self.top_scroll.setFrameStyle(Qt.QFrame.NoFrame)
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self.top_scroll_layout.addWidget(self.top_scroll)
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self.top_scroll.setWidgetResizable(True)
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self.top_widget = Qt.QWidget()
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self.top_scroll.setWidget(self.top_widget)
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self.top_layout = Qt.QVBoxLayout(self.top_widget)
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self.top_grid_layout = Qt.QGridLayout()
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self.top_layout.addLayout(self.top_grid_layout)
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self.settings = Qt.QSettings("gnuradio/flowgraphs", "default")
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try:
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geometry = self.settings.value("geometry")
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if geometry:
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self.restoreGeometry(geometry)
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except BaseException as exc:
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print(f"Qt GUI: Could not restore geometry: {str(exc)}", file=sys.stderr)
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self.flowgraph_started = threading.Event()
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##################################################
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# Variables
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##################################################
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self.samp_rate = samp_rate = 1000000
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self.center_freq = center_freq = 915e6
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##################################################
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# Blocks
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##################################################
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self.qtgui_freq_sink_x_0 = qtgui.freq_sink_c(
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1024, #size
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window.WIN_BLACKMAN_hARRIS, #wintype
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center_freq, #fc
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samp_rate, #bw
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"LoRa Spectrum", #name
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1,
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None # parent
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)
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self.qtgui_freq_sink_x_0.set_update_time(0.10)
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self.qtgui_freq_sink_x_0.set_y_axis((-140), 10)
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self.qtgui_freq_sink_x_0.set_y_label('Relative Gain', 'dB')
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self.qtgui_freq_sink_x_0.set_trigger_mode(qtgui.TRIG_MODE_FREE, 0.0, 0, "")
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self.qtgui_freq_sink_x_0.enable_autoscale(False)
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self.qtgui_freq_sink_x_0.enable_grid(False)
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self.qtgui_freq_sink_x_0.set_fft_average(1.0)
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self.qtgui_freq_sink_x_0.enable_axis_labels(True)
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self.qtgui_freq_sink_x_0.enable_control_panel(False)
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self.qtgui_freq_sink_x_0.set_fft_window_normalized(False)
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labels = ['', '', '', '', '',
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'', '', '', '', '']
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widths = [1, 1, 1, 1, 1,
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1, 1, 1, 1, 1]
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colors = ["blue", "red", "green", "black", "cyan",
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"magenta", "yellow", "dark red", "dark green", "dark blue"]
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alphas = [1.0, 1.0, 1.0, 1.0, 1.0,
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1.0, 1.0, 1.0, 1.0, 1.0]
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for i in range(1):
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if len(labels[i]) == 0:
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self.qtgui_freq_sink_x_0.set_line_label(i, "Data {0}".format(i))
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else:
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self.qtgui_freq_sink_x_0.set_line_label(i, labels[i])
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self.qtgui_freq_sink_x_0.set_line_width(i, widths[i])
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self.qtgui_freq_sink_x_0.set_line_color(i, colors[i])
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self.qtgui_freq_sink_x_0.set_line_alpha(i, alphas[i])
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self._qtgui_freq_sink_x_0_win = sip.wrapinstance(self.qtgui_freq_sink_x_0.qwidget(), Qt.QWidget)
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self.top_layout.addWidget(self._qtgui_freq_sink_x_0_win)
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self.osmosdr_source_0 = osmosdr.source(
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args="numchan=" + str(1) + " " + ""
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)
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self.osmosdr_source_0.set_time_unknown_pps(osmosdr.time_spec_t())
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self.osmosdr_source_0.set_sample_rate(samp_rate)
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self.osmosdr_source_0.set_center_freq(center_freq, 0)
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self.osmosdr_source_0.set_freq_corr(0, 0)
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self.osmosdr_source_0.set_dc_offset_mode(0, 0)
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self.osmosdr_source_0.set_iq_balance_mode(0, 0)
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self.osmosdr_source_0.set_gain_mode(False, 0)
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self.osmosdr_source_0.set_gain(40, 0)
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self.osmosdr_source_0.set_if_gain(20, 0)
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self.osmosdr_source_0.set_bb_gain(20, 0)
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self.osmosdr_source_0.set_antenna('', 0)
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self.osmosdr_source_0.set_bandwidth(0, 0)
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self.low_pass_filter_0 = filter.fir_filter_ccf(
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2,
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firdes.low_pass(
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1,
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samp_rate,
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200e3,
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50e3,
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window.WIN_HAMMING,
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6.76))
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self.lora_rx_0 = lora_sdr.lora_sdr_lora_rx( bw=125000, cr=1, has_crc=True, impl_head=False, pay_len=255, samp_rate=(int(samp_rate/2)), sf=7, sync_word=[0x12], soft_decoding=True, ldro_mode=2, print_rx=[True,True])
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self.blocks_message_debug_0 = blocks.message_debug(True, gr.log_levels.info)
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self.xmlrpc_server_0 = SimpleXMLRPCServer(('0.0.0.0', 8080), allow_none=True)
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self.xmlrpc_server_0.register_introspection_functions()
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self.xmlrpc_server_0.register_instance(self)
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self.xmlrpc_server_0_thread = threading.Thread(target=self.xmlrpc_server_0.serve_forever)
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self.xmlrpc_server_0_thread.daemon = True
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self.xmlrpc_server_0_thread.start()
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##################################################
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# Connections
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##################################################
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self.msg_connect((self.lora_rx_0, 'out'), (self.blocks_message_debug_0, 'print'))
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self.connect((self.low_pass_filter_0, 0), (self.lora_rx_0, 0))
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self.connect((self.osmosdr_source_0, 0), (self.low_pass_filter_0, 0))
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self.connect((self.osmosdr_source_0, 0), (self.qtgui_freq_sink_x_0, 0))
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def closeEvent(self, event):
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self.settings = Qt.QSettings("gnuradio/flowgraphs", "default")
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self.settings.setValue("geometry", self.saveGeometry())
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self.stop()
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self.wait()
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event.accept()
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def get_samp_rate(self):
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return self.samp_rate
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def set_samp_rate(self, samp_rate):
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self.samp_rate = samp_rate
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self.osmosdr_source_0.set_sample_rate(self.samp_rate)
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self.low_pass_filter_0.set_taps(firdes.low_pass(1, self.samp_rate, 200e3, 50e3, window.WIN_HAMMING, 6.76))
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self.qtgui_freq_sink_x_0.set_frequency_range(self.center_freq, self.samp_rate)
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def get_center_freq(self):
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return self.center_freq
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def set_center_freq(self, center_freq):
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self.center_freq = center_freq
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self.osmosdr_source_0.set_center_freq(self.center_freq, 0)
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self.qtgui_freq_sink_x_0.set_frequency_range(self.center_freq, self.samp_rate)
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def main(top_block_cls=default, options=None):
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qapp = Qt.QApplication(sys.argv)
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tb = top_block_cls()
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tb.start()
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tb.flowgraph_started.set()
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tb.show()
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def sig_handler(sig=None, frame=None):
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tb.stop()
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tb.wait()
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Qt.QApplication.quit()
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signal.signal(signal.SIGINT, sig_handler)
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signal.signal(signal.SIGTERM, sig_handler)
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timer = Qt.QTimer()
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timer.start(500)
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timer.timeout.connect(lambda: None)
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qapp.exec_()
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if __name__ == '__main__':
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main()
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