class RemoteDeviceUnderTest(DeviceUnderTest):
def add_options(self, parser):
add_communication_options(parser)
parser.add_option("-n",
"--node",
dest="node",
metavar="ADDR",
type="int",
help="Connect to node with ZigBit address ADDR")
def setup(self, options):
if not options.verbosity:
options.verbosity = "warning"
coor = get_coordinator(options)
coor.post("prog/firstcall", "1")
self.node = ALHProxy(coor, options.node)
self.node.post("prog/firstcall", "1")
self.spectrumsensor = SpectrumSensor(self.node)
self.config_list = self.spectrumsensor.get_config_list()
if not self.config_list.configs:
raise Exception("Device returned no configurations. "
"It is still scanning or not responding.")
self.config = self.config_list.get_config(self.device_id,
self.config_id)
def get_fw_version(self):
return self.node.get("hello").strip()
def get_status(self):
resp = self.node.get("sensing/deviceStatus").strip()
return [v.strip() for v in resp.split("\n")]
def measure_ch_impl(self, ch, n):
sweep_config = SweepConfig(self.config, ch, ch + 1, 1)
duration = int(math.ceil(self.config.time * n * 1e-3 + 1.0))
now = time.time()
sensor_program = SpectrumSensorProgram(sweep_config, now + 1, duration,
2)
self.spectrumsensor.program(sensor_program)
while not self.spectrumsensor.is_complete(sensor_program):
time.sleep(1)
result = self.spectrumsensor.retrieve(sensor_program)
measurements = [sweep.data[0] for sweep in result.sweeps]
measurements = measurements[:n]
assert len(measurements) == n
return measurements
class RemoteDeviceUnderTest(DeviceUnderTest):
def add_options(self, parser):
add_communication_options(parser)
parser.add_option(
"-n", "--node", dest="node", metavar="ADDR", type="int", help="Connect to node with ZigBit address ADDR"
)
def setup(self, options):
if not options.verbosity:
options.verbosity = "warning"
coor = get_coordinator(options)
coor.post("prog/firstcall", "1")
self.node = ALHProxy(coor, options.node)
self.node.post("prog/firstcall", "1")
self.spectrumsensor = SpectrumSensor(self.node)
self.config_list = self.spectrumsensor.get_config_list()
if not self.config_list.configs:
raise Exception("Device returned no configurations. " "It is still scanning or not responding.")
self.config = self.config_list.get_config(self.device_id, self.config_id)
def get_fw_version(self):
return self.node.get("hello").strip()
def get_status(self):
resp = self.node.get("sensing/deviceStatus").strip()
return [v.strip() for v in resp.split("\n")]
def measure_ch_impl(self, ch, n):
sweep_config = SweepConfig(self.config, ch, ch + 1, 1)
duration = int(math.ceil(self.config.time * n * 1e-3 + 1.0))
now = time.time()
sensor_program = SpectrumSensorProgram(sweep_config, now + 1, duration, 2)
self.spectrumsensor.program(sensor_program)
while not self.spectrumsensor.is_complete(sensor_program):
time.sleep(1)
result = self.spectrumsensor.retrieve(sensor_program)
measurements = [sweep.data[0] for sweep in result.sweeps]
measurements = measurements[:n]
assert len(measurements) == n
return measurements
def test_retrieve(self):
class MockALH(ALHProtocol):
def _get(self, resource, *args):
if b"Info" in resource:
return b"status=COMPLETE,size=14"
else:
return b"\x00\x00\x00\x00\x00\x00\x01\x00\x02\x00\x91m\x00i"
alh = MockALH()
ss = SpectrumSensor(alh)
sc = self._get_sc()
p = SpectrumSensorProgram(sc, 0, 10, 1)
r = ss.retrieve(p)
self.assertEqual(len(r.sweeps), 1)
self.assertEqual(r.sweeps[0].data, [0., .01, .02])
self.assertEqual(r.sweeps[0].timestamp, 0)
def test_retrieve(self): class MockALH(ALHProtocol): def _get(self, resource, *args): if b"Info" in resource: return b"status=COMPLETE,size=14" else: return b"\x00\x00\x00\x00\x00\x00\x01\x00\x02\x00\x91m\x00i" alh = MockALH() ss = SpectrumSensor(alh) sc = self._get_sc() p = SpectrumSensorProgram(sc, 0, 10, 1) r = ss.retrieve(p) self.assertEqual(len(r.sweeps), 1) self.assertEqual(r.sweeps[0].data, [0., .01, .02]) self.assertEqual(r.sweeps[0].timestamp, 0)
def senseStart(self, time_start, time_duration , slot_id):
#start spectrum sensing on node with the given configuration (self.sweep_config it is what matter)
#may perform a few frequency sweeps, depends on the time duration
#this can generate exception if sweep_config is None
if self.sweep_config is None:
print "Cannot start sensing, configuration is missing"
return None
#get a program object.
program = SpectrumSensorProgram(self.sweep_config, time_start, time_duration , slot_id )
#get sensor object, with this we'll program the node
sensor = SpectrumSensor(self.node)
#program the sensor
sensor.program(program)
#waiting for the sensor to finish the job
while not sensor.is_complete(program):
print "waiting..."
time.sleep(1)
if time.time() > (program.time_start + program.time_duration + 60):
raise Exception("Something went wrong with the sensing")
print "Experiment is finished. retrieving data."
result = sensor.retrieve(program)
#try to make a folder
try:
os.mkdir("./data")
except OSError:
pass
try:
os.mkdir("./data/coor_%d" %self.coordinator_id)
except OSError:
pass
#write results in a file
result.write("./data/coor_%d/node_%s.dat" %(self.coordinator_id ,self.node_id))
class NodePair(object):
# Object constructor takes two nodes: Node doing the signal
# transmission and node doing power measurements.
def __init__(self, txnode, rxnode):
# We set up the SignalGenerator and SpectrumSensor objects here
# for later use. We also query both nodes for their
# corresponding lists of available hardware configurations.
#
# Since hardware will not change during the experiment, we only
# do the query once in object constructor. This makes repeated
# measurements faster.
self.generator = SignalGenerator(txnode)
self.generator_cl = self.generator.get_config_list()
self.sensor = SpectrumSensor(rxnode)
self.sensor_cl = self.sensor.get_config_list()
# This method performs the power measurement. f_hz parameter is the
# central frequency in hertz on which the channel measurement will be done.
# ptx_dbm is the transmission power in dbm. If ptx_dbm is None, then
# the transmitting node will remain silent.
def measure(self, f_hz, ptx_dbm):
now = time.time()
if ptx_dbm is not None:
# If transmission was requested, setup the transmitter.
tx_config = self.generator_cl.get_tx_config(f_hz, ptx_dbm)
if tx_config is None:
raise Exception("Node can not scan specified frequency range.")
generator_p = SignalGeneratorProgram(tx_config, now + 1, 14)
self.generator.program(generator_p)
# Setup the receiver for power measurement at the same
# frequency as the transmitter. We will only sense a single
# frequency, hence both start and stop parameters of the sweep
# are set to f_hz.
sweep_config = self.sensor_cl.get_sweep_config(f_hz, f_hz, 400e3)
if sweep_config is None:
raise Exception("Node can not scan specified frequency range.")
sensor_p = SpectrumSensorProgram(sweep_config, now + 3, 10, 1)
self.sensor.program(sensor_p)
# Note that the transmit interval is longer than the receive
# interval:
#
# now + 1 + 3 / + 13 + 15
# | tx start rx start \ rx stop tx stop
# | | | / | |
# | | |===========\===========| |
# | | receive / | |
# | | \ |
# | |======================/======================|
# transmit
#
# This is to make sure that signal transmission is happening
# during the whole time the receiver is measuring signal power.
# Start times may differ +/- 1 second due to unsynchronized
# clocks and management network latency.
while not self.sensor.is_complete(sensor_p):
print "waiting..."
time.sleep(2)
# Retrieve the data and return a single vector with power
# measurements (in dBm) from the sensing node.
result = self.sensor.retrieve(sensor_p)
return np.array(result.get_data())[:, 0]
# This method calculates the channel gain between the nodes.
def get_channel_gain(self, f_hz, ptx_dbm):
def db_to_mw(db):
return 10.**(db / 10.)
def mw_to_db(mw):
return 10. * np.log10(mw)
# First, measure just the noise level on the receiving node.
# Transmitter is turned off.
pnoise_dbm = self.measure(f_hz, None)
# Second, measure the received signal power level with the
# transmitter turned on.
prx_dbm = self.measure(f_hz, ptx_dbm)
# Convert all power values to linear scale.
ptx_mw = db_to_mw(ptx_dbm)
pnoise_mw = db_to_mw(pnoise_dbm)
prx_mw = db_to_mw(prx_dbm)
# Take the mean of both noise and received signal power
# measurements.
pnoise_mw_mean = np.mean(pnoise_mw)
prx_mw_mean = np.mean(prx_mw)
print "p_noise = %.1f dBm (mean=%e mW std=%e mW)" % (
mw_to_db(pnoise_mw_mean), pnoise_mw_mean, np.std(pnoise_mw))
print "p_rx = %.1f dBm (mean=%e mW std=%e mW)" % (
mw_to_db(prx_mw_mean), prx_mw_mean, np.std(prx_mw))
# Use the mean values to estimate the channel gain.
h_mean = (prx_mw_mean - pnoise_mw_mean) / ptx_mw
# Convert back to logarithmic scale.
h_mean_db = mw_to_db(h_mean)
print "h = %.1f dB" % (h_mean_db, )
return h_mean_db
def main():
# Turn on logging so that we can see ALH requests happening in the
# background.
logging.basicConfig(level=logging.INFO)
coor = alh.ALHWeb("https://crn.log-a-tec.eu/communicator", 10001)
# Nodes 16 and 17 are equipped with an 2.4 GHz tranceiver (CC2500 on
# SNE-ISMTV-24) that is capable of transmitting and receiving on the
# 2.4 GHz ISM band.
node16 = alh.ALHProxy(coor, 16)
node17 = alh.ALHProxy(coor, 17)
# We will use node 16 as a signal generator. We wrap its ALHProxy
# object with a SignalGenerator object for convenience.
generator = SignalGenerator(node16)
# Set up a transmission configuration for 2.425 GHz and 0 dBm
generator_config_list = generator.get_config_list()
tx_config = generator_config_list.get_tx_config(2425e6, 0)
if tx_config is None:
raise Exception("Node can not scan specified frequency range.")
# We will use node 17 as a spectrum sensor. Again, we wrap it with a
# SpectrumSensor object for convenience.
sensor = SpectrumSensor(node17)
# We set up a frequency sweep configuration covering 2.40 GHz to 2.45
# GHz band with 400 kHz steps.
sensor_config_list = sensor.get_config_list()
sweep_config = sensor_config_list.get_sweep_config(2400e6, 2450e6, 400e3)
if sweep_config is None:
raise Exception("Node can not scan specified frequency range.")
# Take note of current time.
now = time.time()
# SignalGeneratorProgram and SpectrumSensorProgram objects allow us to
# program signal generation and spectrum sensing tasks in advance.
#
# In this case, we setup a signal generation task using the
# configuration we prepared above starting 10 seconds from now and
# lasting for 20 seconds.
#
# Similarly for spectrum sensing, we setup a task using frequency sweep
# we prepared above starting 5 seconds from now and lasting for 30
# seconds. Results of the measurement will be stored in slot 4.
generator_program = SignalGeneratorProgram(tx_config, now + 10, 20)
sensor_program = SpectrumSensorProgram(sweep_config, now + 5, 30, 4)
# Now actually send instructions over the management network to nodes
# in the testbed.
generator.program(generator_program)
sensor.program(sensor_program)
# Query the spectrum sensing node and wait until the task has been
# completed.
while not sensor.is_complete(sensor_program):
print "waiting..."
time.sleep(2)
# Retrieve spectrum sensing results. This might take a while since the
# management mesh network is slow.
result = sensor.retrieve(sensor_program)
# Write results into a CSV file.
result.write("06-programmed-tasks.dat")
def main():
# Turn on logging so that we can see requests and responses in the
# terminal. This is useful to keep track of what is going on during the
# experiment.
logging.basicConfig(level=logging.INFO)
# We must first create an object representing the coordinator node.
# Each cluster in the LOG-a-TEC has its own coordinator and all
# communication with the nodes must go through it.
#
# The parameters used here correspond to the LOG-a-TEC City Center
# out-door cluster (see LOG-a-TEC documentation for other valid
# options).
#
# Note that you must have a valid user name and password saved in an
# "alhrc" file in order for this to work. See vesna-alh-tools README
# for instructions on how to do that.
#
# Also make sure you reserved the cluster in the calendar before
# running the experiment!
coor = alh.ALHWeb("https://crn.log-a-tec.eu/communicator", 10002)
# We will be using node 45 in this example. First we create a generic
# node object for it.
node = alh.ALHProxy(coor, 45)
# We will use our node as a spectrum sensor. Here, we wrap the generic
# node object with the SpectrumSensor class that provides a convenient
# interface to the spectrum sensing capabilities of the node's radio
# hardware.
sensor = SpectrumSensor(node)
# Request the list of spectrum sensing configurations that the node
# supports.
#
# Node 45 is equipped with a SNE-ISMTV-2400 radio board that contains a
# CC2500 reconfigurable transceiver. This tranceiver supports a number
# of configurations that cover the 2.4 GHz ISM band.
sensor_config_list = sensor.get_config_list()
# Let's print the list out in a nice format for future reference.
print
print "Spectrum sensing devices and configurations available"
print "====================================================="
print sensor_config_list
print
# For a demonstration, we'll choose to sense the whole ISM band between
# 2.4 GHz and 2.5 GHz with 400 kHz steps. We create a SweepConfig object
# that describes this frequency range.
sweep_config = sensor_config_list.get_sweep_config(2400e6, 2500e6, 400e3)
if sweep_config is None:
raise Exception("Node can not scan specified frequency range.")
# Take note of current time.
now = time.time()
# SpectrumSensorProgram object allows us to program a node to perform a
# spectrum sensing task in advance. We'll setup a task for sensing the
# frequency range we selected above, starting 5 seconds from now and
# lasting for 30 seconds.
#
# Each node has local slots for temporary storage of spectrum sensing
# results. Since we are only performing one scan of the spectrum, it
# doesn't matter which slot we use. Let's pick slot 1.
sensor_program = SpectrumSensorProgram(sweep_config, now + 5, 30, 1)
# Now we actually send the programming instructions over the testbed's
# management network to the node.
sensor.program(sensor_program)
# Wait until the programmed task has been completed.
while not sensor.is_complete(sensor_program):
print "patience..."
time.sleep(2)
# The task is complete. We must now retrieve spectrum sensing results
# back from the node to our computer. This might take a while since the
# management mesh network is slow.
result = sensor.retrieve(sensor_program)
# Finally, we write results into a CSV file for further analysis.
#
# Alternatively, we could do something else with the results directly
# from this program. The SpectrumSensorResult object provides some
# convenient methods for accessing the result of the scan.
result.write("logatec.csv")
def main():
# Turn on logging so that we can see requests and responses in the
# terminal. This is useful to keep track of what is going on during the
# experiment.
logging.basicConfig(level=logging.INFO)
# We must first create an object representing the coordinator node.
# Each cluster in the LOG-a-TEC has its own coordinator and all
# communication with the nodes must go through it.
#
# The parameters used here correspond to the LOG-a-TEC City Center
# out-door cluster (see LOG-a-TEC documentation for other valid
# options).
#
# Note that you must have a valid user name and password saved in an
# "alhrc" file in order for this to work. See vesna-alh-tools README
# for instructions on how to do that.
#
# Also make sure you reserved the cluster in the calendar before
# running the experiment!
coor = alh.ALHWeb("https://crn.log-a-tec.eu/communicator", 10002)
# We will be using node 45 in this example. First we create a generic
# node object for it.
node = alh.ALHProxy(coor, 45)
# We will use our node as a spectrum sensor. Here, we wrap the generic
# node object with the SpectrumSensor class that provides a convenient
# interface to the spectrum sensing capabilities of the node's radio
# hardware.
sensor = SpectrumSensor(node)
# Request the list of spectrum sensing configurations that the node
# supports.
#
# Node 45 is equipped with a SNE-ISMTV-2400 radio board that contains a
# CC2500 reconfigurable transceiver. This tranceiver supports a number
# of configurations that cover the 2.4 GHz ISM band.
sensor_config_list = sensor.get_config_list()
# Let's print the list out in a nice format for future reference.
print
print "Spectrum sensing devices and configurations available"
print "====================================================="
print sensor_config_list
print
# For a demonstration, we'll choose to sense the whole ISM band between
# 2.4 GHz and 2.5 GHz with 400 kHz steps. We create a SweepConfig object
# that describes this frequency range.
sweep_config = sensor_config_list.get_sweep_config(2400e6, 2500e6, 400e3)
if sweep_config is None:
raise Exception("Node can not scan specified frequency range.")
# Take note of current time.
now = time.time()
# SpectrumSensorProgram object allows us to program a node to perform a
# spectrum sensing task in advance. We'll setup a task for sensing the
# frequency range we selected above, starting 5 seconds from now and
# lasting for 30 seconds.
#
# Each node has local slots for temporary storage of spectrum sensing
# results. Since we are only performing one scan of the spectrum, it
# doesn't matter which slot we use. Let's pick slot 1.
sensor_program = SpectrumSensorProgram(sweep_config, now + 5, 30, 1)
# Now we actually send the programming instructions over the testbed's
# management network to the node.
sensor.program(sensor_program)
# Wait until the programmed task has been completed.
while not sensor.is_complete(sensor_program):
print "patience..."
time.sleep(2)
# The task is complete. We must now retrieve spectrum sensing results
# back from the node to our computer. This might take a while since the
# management mesh network is slow.
result = sensor.retrieve(sensor_program)
# Finally, we write results into a CSV file for further analysis.
#
# Alternatively, we could do something else with the results directly
# from this program. The SpectrumSensorResult object provides some
# convenient methods for accessing the result of the scan.
result.write("logatec.csv")
def main():
# Turn on logging so that we can see ALH requests happening in the
# background.
logging.basicConfig(level=logging.INFO)
coor = alh.ALHWeb("https://crn.log-a-tec.eu/communicator", 10001)
# Nodes 16 and 17 are equipped with an 2.4 GHz tranceiver (CC2500 on
# SNE-ISMTV-24) that is capable of transmitting and receiving on the
# 2.4 GHz ISM band.
node16 = alh.ALHProxy(coor, 16)
node17 = alh.ALHProxy(coor, 17)
# We will use node 16 as a signal generator. We wrap its ALHProxy
# object with a SignalGenerator object for convenience.
generator = SignalGenerator(node16)
# Set up a transmission configuration for 2.425 GHz and 0 dBm
generator_config_list = generator.get_config_list()
tx_config = generator_config_list.get_tx_config(2425e6, 0)
if tx_config is None:
raise Exception("Node can not scan specified frequency range.")
# We will use node 17 as a spectrum sensor. Again, we wrap it with a
# SpectrumSensor object for convenience.
sensor = SpectrumSensor(node17)
# We set up a frequency sweep configuration covering 2.40 GHz to 2.45
# GHz band with 400 kHz steps.
sensor_config_list = sensor.get_config_list()
sweep_config = sensor_config_list.get_sweep_config(2400e6, 2450e6, 400e3)
if sweep_config is None:
raise Exception("Node can not scan specified frequency range.")
# Take note of current time.
now = time.time()
# SignalGeneratorProgram and SpectrumSensorProgram objects allow us to
# program signal generation and spectrum sensing tasks in advance.
#
# In this case, we setup a signal generation task using the
# configuration we prepared above starting 10 seconds from now and
# lasting for 20 seconds.
#
# Similarly for spectrum sensing, we setup a task using frequency sweep
# we prepared above starting 5 seconds from now and lasting for 30
# seconds. Results of the measurement will be stored in slot 4.
generator_program = SignalGeneratorProgram(tx_config, now + 10, 20)
sensor_program = SpectrumSensorProgram(sweep_config, now + 5, 30, 4)
# Now actually send instructions over the management network to nodes
# in the testbed.
generator.program(generator_program)
sensor.program(sensor_program)
# Query the spectrum sensing node and wait until the task has been
# completed.
while not sensor.is_complete(sensor_program):
print "waiting..."
time.sleep(2)
# Retrieve spectrum sensing results. This might take a while since the
# management mesh network is slow.
result = sensor.retrieve(sensor_program)
# Write results into a CSV file.
result.write("06-programmed-tasks.dat")
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)