def test_get_hz_list(self): sc = SweepConfig(self.dc, start_ch=0, stop_ch=10, step_ch=2) r = sc.get_hz_list() self.assertIsInstance(r, list) self.assertEqual(r, [1000, 1002, 1004, 1006, 1008])
class GameNode:
# transmitting and receiving configurations
sweepConfig = None
txConfig = None
# reference to sensor and generator objects
sensorNode = None
generatorNode = None
def __init__(self, coordinatorId, nodeId, showLog=True):
"""node constructor
Keywords arguments:
coordinatorId -- Numerical cluster id.
nodeId -- id number of node.
"""
# get coordinator object
self.coordinator = alh.ALHWeb("https://crn.log-a-tec.eu/communicator", coordinatorId)
# get node object
self.node = alh.ALHProxy(self.coordinator, nodeId)
# save Ids
self.coordinatorId = coordinatorId
self.nodeId = nodeId
if showLog:
logging.basicConfig(level=logging.INFO)
def nodeTest(self):
"""Print a string if node is active"""
print self.node.get("sensor/mcuTemp")
def coordinatorTest(self):
"""Print a string if coordinator is active"""
print self.coordinator.get("hello")
def getNodeID(self):
return self.nodeId
def getSenseConfig(self):
"""just get a configuration list so I can see it"""
SpectrumSensor(self).get_config_list()
def getGeneratorConfig(self):
"""just get a configuration list so I can see it"""
SignalGenerator(self).get_config_list()
def setSenseConfiguration(self, startFreqHz, endFreqHz, stepFerqHz):
"""Set sensing configuration.
Measure the power in frequency band [startFrewHz, endFreqHz] with a predefined step.
startFreqHz -- Lower bound of the frequency band to check (inclusive)
endFreqHz -- Upper bound of the frequency band to check (inclusive)
stepFerqHz -- Frequency step
"""
self.sensorNode = SpectrumSensor(self.node)
sensorConfigList = self.sensorNode.get_config_list()
self.sweepConfig = sensorConfigList.get_sweep_config(startFreqHz, endFreqHz, stepFerqHz)
if self.sweepConfig is None:
raise Exception("Something went wrong with the sweepConfig. sweepConfig is None")
def setSenseConfigurationChannel(self, startCh, endCh, stepCh):
"""Set sensing configuration.
Measure the power from start_ch to stop_ch with predefined step
startCh -- Lowest frequency channel to sweep
endCh -- One past the highest frequency channel to sweep
stepCh -- How many channels in a step
"""
self.sensorNode = SpectrumSensor(self.node)
sensorConfigList = self.sensorNode.get_config_list()
self.sweepConfig = SweepConfig(sensorConfigList.get_config(0, 0), startCh, endCh, stepCh)
if self.sweepConfig is None:
raise Exception("Something went wrong with the sweepConfig. sweepConfig is None")
def setSenseConfigurationFuulSweep(self):
"""Set sensing configuration.
This method will sense the entire band that device supports.
"""
self.sensorNode = SpectrumSensor(self.node)
sensorConfigList = self.sensorNode.get_config_list()
# self.sweepConfig = SpectrumSensor(self.node).get_config_list().get_config(0,0).get_full_sweep_config()
self.sweepConfig = sensorConfigList.get_config(0, 0).get_full_sweep_config()
if self.sweepConfig is None:
raise Exception("Something went wrong with the sweepConfig. sweepConfig is None")
def senseStart(self, timeStart, timeDuration, slotID):
"""Start spectrum sensing on node with predefined configuration (self.sweep_config).
May perform a few frequency sweeps, depends on the time duration.
If sweepConfig is None raise exception.
timeStart -- Time to start the task (UNIX timestamp).
timeDuration -- Duration of the task in seconds.
slotID -- Numerical slot id used for storing measurements.
"""
if self.sweepConfig is None:
print "Cannot start Sensing. Configuration is missing!!"
return None
# get program object
program = SpectrumSensorProgram(self.sweepConfig, timeStart, timeDuration, slotID)
# get sensor object and program the node
self.sensorNode.program(program)
# wait for sensor to finish the job
while not self.sensorNode.is_complete(program):
print "waiting..."
time.sleep(1)
if time.time() > (program.time_start + program.time_duration + 60):
raise Exception("Something went wrong when sensing")
print "Sensing finished, retrieving data."
result = self.sensorNode.retrieve(program)
# for simplicity save data in a folder
try:
os.mkdir("./data")
except OSError:
pass
try:
os.mkdir("./data/coor_%d" % (self.coordinatorId))
except OSError:
pass
# write data, overwrite existing file
result.write("./data/coor_%d/node_%d.dat" % (self.coordinatorId, self.nodeId))
def senseStartQuick(self):
"""returns a list : [[frequencies] , [power_dbm]]
Starts spectrum sensing on node with predefined configuration (self.sweepConfig).
This method will do a quick step. Use this if time is critical!
Bandwidth you can measure in this case is limited.
This will perform a single frequency step with the sweep method defined in the SpectrumSensor class.
If sweepConfig is None raise exception.
"""
if self.sweepConfig is None:
print "Cannot start Sensing. Configuration is missing!!"
return None
sweep = SpectrumSensor(self.node).sweep(self.sweepConfig)
# get frequency list
fHz = self.sweepConfig.get_hz_list()
dataReceived = []
dataReceived.append(fHz)
dataReceived.append(sweep.data)
return dataReceived
def setGeneratorConfiguration(self, fHz, powerDBm):
"""Set configuration for signal generation.
fHz -- Frequency to generate.
powerDBm -- Transmission power.
"""
self.generatorNode = SignalGenerator(self.node)
generatorConfigList = self.generatorNode.get_config_list()
self.txConfig = generatorConfigList.get_tx_config(fHz, powerDBm)
if self.txConfig is None:
raise Exception("Something went wrong with configuration, txConfig is None.")
def setGeneratorConfigurationChannel(self, fCh, powerDBm):
"""Set configuration for signal generation.
fHz -- Frequency to generate.
powerDBm -- Transmission power.
"""
self.generatorNode = SignalGenerator(self.node)
generatorConfigList = self.generatorNode.get_config_list()
self.txConfig = TxConfig(generatorConfigList.get_config(0, 0), fCh, powerDBm)
if self.txConfig is None:
raise Exception("Something went wrong with configuration, txConfig is None.")
def generatorStart(self, timeStart, timeDuration):
"""Start signal generation with predefined configuration (txConfig).
If txConfig is None raise exception.
timeStart -- Time when node starts transmitting.
timeDuration -- Time for which node is transmitting.
"""
if self.txConfig is None:
print "Cannot start signal generating, configuration is missing"
return None
# get a program object
program = SignalGeneratorProgram(self.txConfig, timeStart, timeDuration)
self.generatorNode.program(program)
