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Web API: NFM scanner Python script example (3)
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f4exb
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@ -7,6 +7,7 @@ import numpy as np
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base_url = "http://127.0.0.1:8091/sdrangel"
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deviceset_url = ""
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verbosity = 2
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requests_methods = {
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"GET": requests.get,
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@ -47,6 +48,11 @@ def getInputOptions():
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parser.add_option("-r", "--rf-bw", dest="rf_bw", help="RF babdwidth (Hz). Sets to nearest available", metavar="FREQUENCY", type="int", default=10000)
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parser.add_option("-c", "--create", dest="create", help="create a new device set", metavar="BOOLEAN", action="store_true", default=False)
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parser.add_option("-m", "--mock", dest="mock", help="just print calculated values and exit", metavar="BOOLEAN", action="store_true", default=False)
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parser.add_option("--ppm", dest="lo_ppm", help="LO correction in PPM", metavar="PPM", type="float", default=0.0)
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parser.add_option("-t", "--settling-time", dest="settling_time", help="Scan step settling time in seconds", metavar="SECONDS", type="float", default=1.0)
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parser.add_option("--sq", dest="squelch_db", help="Squelsch threshold in dB", metavar="DECIBEL", type="float", default=-50.0)
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parser.add_option("--sq-gate", dest="squelch_gate", help="Squelsch gate in ms", metavar="MILLISECONDS", type="int", default=50)
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parser.add_option("--re-run", dest="rerun", help="re run with given parameters without setting up device and channels", metavar="BOOLEAN", action="store_true", default=False)
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(options, args) = parser.parse_args()
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@ -79,11 +85,15 @@ def setupDevice(scan_control, options):
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settings['rtlSdrSettings']['gain'] = 496
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settings['rtlSdrSettings']['log2Decim'] = options.log2_decim
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settings['rtlSdrSettings']['dcBlock'] = 1
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settings['rtlSdrSettings']['iqImbalance'] = 1
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settings['rtlSdrSettings']['agc'] = 1
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settings['rtlSdrSettings']['loPpmCorrection'] = int(options.lo_ppm)
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settings['rtlSdrSettings']['rfBandwidth'] = scan_control.device_step_freq + 100000
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elif options.device_hwid == "HackRF":
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settings['hackRFInputSettings']['LOppmTenths'] = -51
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settings['hackRFInputSettings']['LOppmTenths'] = options.lo_ppm * 10 # in tenths of PPM
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settings['hackRFInputSettings']['centerFrequency'] = scan_control.device_start_freq
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settings['hackRFInputSettings']['dcBlock'] = 1
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settings['hackRFInputSettings']['iqImbalance'] = 1
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settings['hackRFInputSettings']['devSampleRate'] = scan_control.device_sample_rate
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settings['hackRFInputSettings']['lnaExt'] = 1
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settings['hackRFInputSettings']['lnaGain'] = 32
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@ -94,28 +104,60 @@ def setupDevice(scan_control, options):
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if r is None:
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exit(-1)
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def changeDeviceFrequency(fc, options):
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settings = callAPI(deviceset_url + "/device/settings", "GET", None, None, "Get device settings")
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if settings is None:
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exit(-1)
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if options.device_hwid == "LimeSDR":
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settings["limeSdrInputSettings"]["centerFrequency"] = fc + 500000
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elif options.device_hwid == "RTLSDR":
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settings['rtlSdrSettings']['centerFrequency'] = fc
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elif options.device_hwid == "HackRF":
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settings['hackRFInputSettings']['centerFrequency'] = fc
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r = callAPI(deviceset_url + "/device/settings", "PATCH", None, settings, "Patch device center frequncy")
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if r is None:
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exit(-1)
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# ======================================================================
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def setupChannels(scan_control, options):
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i = 0
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for shift in scan_control.channel_shifts:
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settings = callAPI("/deviceset/0/channel", "POST", None, {"channelType": "NFMDemod", "tx": 0}, "Create NFM demod")
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settings = callAPI(deviceset_url + "/channel", "POST", None, {"channelType": "NFMDemod", "tx": 0}, "Create NFM demod")
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if settings is None:
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exit(-1)
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settings = callAPI("/deviceset/0/channel/%d/settings" % i, "GET", None, None, "Get NFM demod settings")
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settings = callAPI(deviceset_url + "/channel/%d/settings" % i, "GET", None, None, "Get NFM demod settings")
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if settings is None:
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exit(-1)
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settings["NFMDemodSettings"]["inputFrequencyOffset"] = int(shift)
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settings["NFMDemodSettings"]["afBandwidth"] = options.af_bw * 1000
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settings["NFMDemodSettings"]["rfBandwidth"] = options.rf_bw
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settings["NFMDemodSettings"]["squelch"] = options.squelch_db * 10 # centi-Bels
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settings["NFMDemodSettings"]["squelchGate"] = options.squelch_gate / 10 # 10's of ms
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settings["NFMDemodSettings"]["title"] = "Channel %d" % i
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r = callAPI("/deviceset/0/channel/%d/settings" % i, "PATCH", None, settings, "Change NFM demod")
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r = callAPI(deviceset_url + "/channel/%d/settings" % i, "PATCH", None, settings, "Change NFM demod")
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if r is None:
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exit(-1)
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i += 1
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# ======================================================================
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def checkScanning():
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reports = callAPI(deviceset_url + "/channels/report", "GET", None, None, "Get channels report")
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if reports is None:
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exit(-1)
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for i in range(reports["channelcount"]):
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channel = reports["channels"][i]
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if "report" in channel:
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if "NFMDemodReport" in channel["report"]:
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if channel["report"]["NFMDemodReport"]["squelch"] == 1:
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return False # stop scanning
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return True # continue scanning
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# ======================================================================
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def printResponse(response):
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content_type = response.headers.get("Content-Type", None)
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@ -131,12 +173,16 @@ def callAPI(url, method, params, json, text):
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if request_method is not None:
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r = request_method(url=base_url+url, params=params, json=json)
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if r.status_code / 100 == 2:
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print(text + " succeeded")
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printResponse(r)
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if verbosity >= 1:
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print(text + " succeeded")
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if verbosity >= 2:
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printResponse(r)
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return r.json() # all 200 yield application/json response
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else:
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print(text + " failed")
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printResponse(r)
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if verbosity >= 1:
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print(text + " failed")
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if verbosity >= 2:
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printResponse(r)
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return None
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# ======================================================================
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@ -145,6 +191,8 @@ def main():
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options = getInputOptions()
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scan_control = ScanControl(options.num_channels, options.freq_step, options.freq_start, options.freq_stop, options.log2_decim)
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# Print calculated scan parameters
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print("Channel shifts: %s" % scan_control.channel_shifts)
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print("Sample rate: %d" % scan_control.device_sample_rate)
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print("Start: %d" % scan_control.device_start_freq)
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@ -155,51 +203,76 @@ def main():
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print("Frequency error")
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exit(1)
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if options.mock:
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freqs = []
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fc = scan_control.device_start_freq
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while fc <= scan_control.device_stop_freq:
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freqs += [x+fc for x in scan_control.channel_shifts]
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fc += scan_control.device_step_freq
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print("Scanned frequencies: %s" % freqs)
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freqs = []
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nb_steps = 1
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fc = scan_control.device_start_freq
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while fc <= scan_control.device_stop_freq:
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freqs += [x+fc for x in scan_control.channel_shifts]
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fc += scan_control.device_step_freq
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nb_steps += 1
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print("Scanned frequencies: %s" % freqs)
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print("In %d steps" % nb_steps)
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if options.mock: # Stop there if we are just mocking (no API access)
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exit(0)
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global base_url
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base_url = "http://%s/sdrangel" % options.address
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# Set Rx
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if options.create:
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r = callAPI("/deviceset", "POST", {"tx": 0}, None, "Add Rx device set")
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if r is None:
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exit(-1)
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# Set Rx
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global deviceset_url
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deviceset_url = "/deviceset/%d" % options.device_index
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r = callAPI(deviceset_url + "/device", "PUT", None, {"hwType": "%s" % options.device_hwid, "tx": 0}, "setup device on Rx device set")
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if r is None:
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exit(-1)
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setupDevice(scan_control, options)
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setupChannels(scan_control, options)
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exit(0)
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settings = callAPI("/deviceset/0/channel", "POST", None, {"channelType": "NFMDemod", "tx": 0}, "Create NFM demod")
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if settings is None:
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exit(-1)
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settings["NFMDemodSettings"]["inputFrequencyOffset"] = 12500
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settings["NFMDemodSettings"]["afBandwidth"] = 5000
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r = callAPI("/deviceset/0/channel/0/settings", "PATCH", None, settings, "Change NFM demod")
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if r is None:
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exit(-1)
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if not options.rerun: # Skip device and channels settings in re-run mode
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if options.create:
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r = callAPI("/deviceset", "POST", {"tx": 0}, None, "Add Rx device set")
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if r is None:
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exit(-1)
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r = callAPI(deviceset_url + "/device", "PUT", None, {"hwType": "%s" % options.device_hwid, "tx": 0}, "setup device on Rx device set")
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if r is None:
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exit(-1)
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# Set device and channels
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setupDevice(scan_control, options)
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setupChannels(scan_control, options)
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# Start running and scanning
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r = callAPI(deviceset_url + "/device/run", "POST", None, None, "Start running device")
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if r is None:
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exit(-1)
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fc = scan_control.device_start_freq
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global verbosity
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verbosity = 0
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print("Move center to %d Hz" % fc)
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changeDeviceFrequency(fc, options)
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try:
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while True:
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time.sleep(options.settling_time)
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if checkScanning(): # shall we move on ?
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fc += scan_control.device_step_freq
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if fc > scan_control.device_stop_freq:
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fc = scan_control.device_start_freq
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print("New pass")
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print("Move center to %d Hz" % fc)
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changeDeviceFrequency(fc, options)
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except KeyboardInterrupt:
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print("Terminated by user")
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pass
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finally:
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verbosity = 2
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r = callAPI(deviceset_url + "/device/run", "DELETE", None, None, "Stop running device")
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if r is None:
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exit(-1)
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except KeyboardInterrupt:
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pass
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except Exception, msg:
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tb = traceback.format_exc()
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print >> sys.stderr, tb
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