class MainWin( wx.Frame ):
def __init__( self, parent, id = wx.ID_ANY, title='', size=(200,200) ):
wx.Frame.__init__(self, parent, id, title, size=size)
self.config = wx.Config(appName="wxExample",
vendorName="Edward Sitarski",
style=wx.CONFIG_USE_LOCAL_FILE)
self.SetBackgroundColour( wx.Colour(232,232,232) )
font = self.GetFont()
bigFont = wx.Font( font.GetPointSize() * 1.5, font.GetFamily(), font.GetStyle(), wx.FONTWEIGHT_BOLD )
italicFont = wx.Font( bigFont.GetPointSize()*2.2, bigFont.GetFamily(), wx.FONTSTYLE_ITALIC, bigFont.GetWeight() )
self.vbs = wx.BoxSizer( wx.VERTICAL )
self.vbs.Add( setFont(italicFont,wx.StaticText(self, wx.ID_ANY, 'wxExample LLRP Reader Demo')), border = 8, flag=wx.LEFT|wx.ALIGN_CENTER_VERTICAL )
self.reset = setFont( bigFont, wx.Button(self, wx.ID_ANY, 'Reset') )
self.reset.Bind( wx.EVT_BUTTON, self.doReset )
self.vbs.Add( self.reset, border = 8, flag=wx.LEFT|wx.ALIGN_CENTER_VERTICAL )
#------------------------------------------------------------------------------------------------
# Reader configuration ui.
#
gbs = wx.GridBagSizer( 4, 4 )
self.vbs.Add( gbs, flag=wx.EXPAND|wx.ALL, border = 4 )
iRow = 0
gbs.Add( setFont(bigFont,wx.StaticText(self, wx.ID_ANY, 'Reader Configuration:')), pos=(iRow,0), span=(1,2), flag=wx.ALIGN_LEFT )
iRow += 1
self.useHostName = wx.RadioButton( self, wx.ID_ANY, 'Host Name:', style=wx.wx.RB_GROUP )
gbs.Add( self.useHostName, pos=(iRow,0), span=(1,1), flag=wx.ALIGN_CENTER_VERTICAL )
hb = wx.BoxSizer( wx.HORIZONTAL )
hb.Add( wx.StaticText(self, wx.ID_ANY, ReaderHostNamePrefix), flag=wx.ALIGN_CENTER_VERTICAL )
self.readerHostName = masked.TextCtrl( self, wx.ID_ANY,
mask = 'NN-NN-NN',
defaultValue = '00-00-00',
useFixedWidthFont = True,
size=(80, -1),
)
hb.Add( self.readerHostName )
hb.Add( wx.StaticText(self, wx.ID_ANY, ReaderHostNameSuffix), flag=wx.ALIGN_CENTER_VERTICAL )
gbs.Add( hb, pos=(iRow,1), span=(1,1), flag=wx.ALIGN_LEFT )
iRow += 1
self.useStaticAddress = wx.RadioButton( self, wx.ID_ANY, 'IP:' )
gbs.Add( self.useStaticAddress, pos=(iRow,0), span=(1,1), flag=wx.ALIGN_CENTER_VERTICAL )
self.readerHost = masked.IpAddrCtrl( self, wx.ID_ANY, style = wx.TE_PROCESS_TAB )
gbs.Add( self.readerHost, pos=(iRow,1), span=(1,1), flag=wx.ALIGN_LEFT )
self.useHostName.SetValue( True )
self.useStaticAddress.SetValue( False )
#------------------------------------------------------------------------------------------------
# Add messages
#
self.readerMessagesText = wx.TextCtrl( self, wx.ID_ANY, style=wx.TE_READONLY|wx.TE_MULTILINE|wx.HSCROLL, size=(-1,400) )
self.vbs.Add( self.readerMessagesText, flag=wx.EXPAND, proportion=1 )
self.readerMessages = MessageManager( self.readerMessagesText )
#------------------------------------------------------------------------------------------------
# Create a timer to check the message queue.
#
self.timer = wx.Timer()
self.timer.Bind( wx.EVT_TIMER, self.updateMessages )
self.timer.Start( 1000, False )
self.Bind(wx.EVT_CLOSE, self.onCloseWindow)
self.readOptions()
self.SetSizer( self.vbs )
self.start()
def start( self ):
self.dataQ = Queue() # Queue to put messages from the reaader.
rospecID = 123 # Arbitrary rospecID.
inventoryParameterSpecID = 1234 # Arbitrary inventory parameter spec id.
# Create a reader connection.
self.conn = LLRPConnection()
# Add a callback so we can print the tags.
self.conn.addHandler( RO_ACCESS_REPORT_Message, self.accessReportHandler )
# Add a default callback so we can see what else comes from the reader.
self.conn.addHandler( 'default', self.defaultHandler )
self.readerMessages.write( 'Connecting to the reader at %s...\n' % datetime.datetime.now() )
try:
response = self.conn.connect( self.getReaderHost() )
except Exception as e:
self.readerMessages.write( 'Connection to reader failed.\nException:\n%s\n\nCheck address and/or network connection and press Reset.' % e )
return
# Compute a correction between the reader's time and the computer's time.
readerTime = response.getFirstParameterByClass(UTCTimestamp_Parameter).Microseconds
readerTime = datetime.datetime.utcfromtimestamp( readerTime / 1000000.0 )
self.timeCorrection = datetime.datetime.now() - readerTime
self.readerMessages.write( 'Disabling all rospecs...' )
response = self.conn.transact( DISABLE_ROSPEC_Message(ROSpecID = 0) )
self.readerMessages.write( 'Delete our old rospec (if it exists).' )
response = self.conn.transact( DELETE_ROSPEC_Message(ROSpecID = rospecID) )
self.readerMessages.write( 'Create an rospec that reports every read as soon as it happens.' )
response = self.conn.transact(
ADD_ROSPEC_Message( Parameters = [
ROSpec_Parameter(
ROSpecID = rospecID,
CurrentState = ROSpecState.Disabled,
Parameters = [
ROBoundarySpec_Parameter( # Configure boundary spec (start and stop triggers for the reader).
Parameters = [
ROSpecStartTrigger_Parameter(ROSpecStartTriggerType = ROSpecStartTriggerType.Immediate),
ROSpecStopTrigger_Parameter(ROSpecStopTriggerType = ROSpecStopTriggerType.Null),
]
), # end ROBoundarySpec
AISpec_Parameter( # Antenna Inventory Spec (specifies which antennas and protocol to use)
AntennaIDs = [0], # Use all antennas.
Parameters = [
AISpecStopTrigger_Parameter( AISpecStopTriggerType = AISpecStopTriggerType.Null ),
InventoryParameterSpec_Parameter(
InventoryParameterSpecID = inventoryParameterSpecID,
ProtocolID = AirProtocols.EPCGlobalClass1Gen2,
),
]
), # end AISpec
ROReportSpec_Parameter( # Report spec (specified how often and what to send from the reader)
ROReportTrigger = ROReportTriggerType.Upon_N_Tags_Or_End_Of_ROSpec,
N = 1, # N = 1 --> update on each read.
Parameters = [
TagReportContentSelector_Parameter(
EnableAntennaID = True,
EnableFirstSeenTimestamp = True,
),
]
), # end ROReportSpec
]
), # end ROSpec_Parameter
]) # end ADD_ROSPEC_Message
)
if not response.success():
self.readerMessages.write( 'ADD_ROSPEC failed. response:\n%s' % response)
return
self.readerMessages.write( 'And enable it...' )
response = self.conn.transact( ENABLE_ROSPEC_Message(ROSpecID = rospecID) )
if not response.success():
self.readerMessages.write( 'ENABLE_ROSPEC failed. response:\n%s' % response)
return
self.readerMessages.write( 'Start thread to listen to the reader...' )
self.readerMessages.write( 'Listening for reader events...')
self.conn.startListener()
def gracefulShutdown( self ):
if self.conn:
if self.conn.isListening():
self.conn.stopListener()
self.conn = None
self.dataQ = None
def updateMessages( self, event ):
''' Write all the accumulated reader messages to the screen. '''
while 1:
try:
d = self.dataQ.get( False )
except Empty:
break
message = ' '.join( str(x) for x in d[1:] )
if d[0] == 'Reader':
self.readerMessages.write( message )
def doReset( self, event ):
self.writeOptions()
self.gracefulShutdown()
self.readerMessages.clear()
wx.CallAfter( self.start )
def onCloseWindow( self, event ):
self.gracefulShutdown()
wx.Exit()
def getReaderHost( self ):
if self.useHostName.GetValue():
return ReaderHostNamePrefix + self.readerHostName.GetValue() + ReaderHostNameSuffix
else:
return self.readerHost.GetAddress()
def writeOptions( self ):
self.config.Write( 'UseHostName', 'True' if self.useHostName.GetValue() else 'False' )
self.config.Write( 'ReaderHostName', ReaderHostNamePrefix + self.readerHostName.GetValue() + ReaderHostNameSuffix )
self.config.Write( 'ReaderAddr', self.readerHost.GetAddress() )
self.config.Write( 'ReaderPort', str(ReaderInboundPort) )
def readOptions( self ):
useHostName = (self.config.Read('UseHostName', 'True').upper()[:1] == 'T')
self.useHostName.SetValue( useHostName )
self.useStaticAddress.SetValue( not useHostName )
self.readerHostName.SetValue( self.config.Read(
'ReaderHostName',
ReaderHostNamePrefix + '00-00-00' + ReaderHostNameSuffix)[len(ReaderHostNamePrefix):-len(ReaderHostNameSuffix)] )
self.readerHost.SetValue( self.config.Read('ReaderAddr', '0.0.0.0') )
def defaultHandler( self, message ):
''' Write to a queue so we can process it later. '''
self.dataQ.put( ('Reader', ('Unexpected message:\n', message) ) )
def accessReportHandler( self, accessReport ):
''' Write the access report to a queue so we can process it later. '''
''' We also could send these directly as a custom event. '''
for tag in accessReport.getTagData():
tagID = HexFormatToInt( tag['EPC'] )
discoveryTime = tag['Timestamp'] # In microseconds since Jan 1, 1970
discoveryTime = datetime.datetime.utcfromtimestamp( discoveryTime / 1000000.0 ) + self.timeCorrection
self.dataQ.put( ('Reader', (tagID, discoveryTime.strftime('%Y-%m-%d %H:%M:%S.%f'))) )
def start( self ): self.dataQ = Queue() # Queue to put messages from the reaader. rospecID = 123 # Arbitrary rospecID. inventoryParameterSpecID = 1234 # Arbitrary inventory parameter spec id. # Create a reader connection. self.conn = LLRPConnection() # Add a callback so we can print the tags. self.conn.addHandler( RO_ACCESS_REPORT_Message, self.accessReportHandler ) # Add a default callback so we can see what else comes from the reader. self.conn.addHandler( 'default', self.defaultHandler ) self.readerMessages.write( 'Connecting to the reader at %s...\n' % datetime.datetime.now() ) try: response = self.conn.connect( self.getReaderHost() ) except Exception as e: self.readerMessages.write( 'Connection to reader failed.\nException:\n%s\n\nCheck address and/or network connection and press Reset.' % e ) return # Compute a correction between the reader's time and the computer's time. readerTime = response.getFirstParameterByClass(UTCTimestamp_Parameter).Microseconds readerTime = datetime.datetime.utcfromtimestamp( readerTime / 1000000.0 ) self.timeCorrection = datetime.datetime.now() - readerTime self.readerMessages.write( 'Disabling all rospecs...' ) response = self.conn.transact( DISABLE_ROSPEC_Message(ROSpecID = 0) ) self.readerMessages.write( 'Delete our old rospec (if it exists).' ) response = self.conn.transact( DELETE_ROSPEC_Message(ROSpecID = rospecID) ) self.readerMessages.write( 'Create an rospec that reports every read as soon as it happens.' ) response = self.conn.transact( ADD_ROSPEC_Message( Parameters = [ ROSpec_Parameter( ROSpecID = rospecID, CurrentState = ROSpecState.Disabled, Parameters = [ ROBoundarySpec_Parameter( # Configure boundary spec (start and stop triggers for the reader). Parameters = [ ROSpecStartTrigger_Parameter(ROSpecStartTriggerType = ROSpecStartTriggerType.Immediate), ROSpecStopTrigger_Parameter(ROSpecStopTriggerType = ROSpecStopTriggerType.Null), ] ), # end ROBoundarySpec AISpec_Parameter( # Antenna Inventory Spec (specifies which antennas and protocol to use) AntennaIDs = [0], # Use all antennas. Parameters = [ AISpecStopTrigger_Parameter( AISpecStopTriggerType = AISpecStopTriggerType.Null ), InventoryParameterSpec_Parameter( InventoryParameterSpecID = inventoryParameterSpecID, ProtocolID = AirProtocols.EPCGlobalClass1Gen2, ), ] ), # end AISpec ROReportSpec_Parameter( # Report spec (specified how often and what to send from the reader) ROReportTrigger = ROReportTriggerType.Upon_N_Tags_Or_End_Of_ROSpec, N = 1, # N = 1 --> update on each read. Parameters = [ TagReportContentSelector_Parameter( EnableAntennaID = True, EnableFirstSeenTimestamp = True, ), ] ), # end ROReportSpec ] ), # end ROSpec_Parameter ]) # end ADD_ROSPEC_Message ) if not response.success(): self.readerMessages.write( 'ADD_ROSPEC failed. response:\n%s' % response) return self.readerMessages.write( 'And enable it...' ) response = self.conn.transact( ENABLE_ROSPEC_Message(ROSpecID = rospecID) ) if not response.success(): self.readerMessages.write( 'ENABLE_ROSPEC failed. response:\n%s' % response) return self.readerMessages.write( 'Start thread to listen to the reader...' ) self.readerMessages.write( 'Listening for reader events...') self.conn.startListener()
