Python sensor poll and callback examples

examples/python/sensors/sensorscallback.py

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+ 
+from ctypes import c_int, c_ubyte, c_void_p, POINTER, string_at, create_string_buffer, c_char_p, c_int, byref #imports allowing the use of our library
+import time
+import platform
+from datetime import datetime
+
+#platform specific imports:
+if (platform.system() == 'Windows'):
+	#Windows
+	from ctypes import windll, WINFUNCTYPE
+	lib = windll.LoadLibrary('TelldusCore.dll') #import our library
+else:
+	#Linux
+	from ctypes import cdll, CFUNCTYPE
+	lib = cdll.LoadLibrary('libtelldus-core.so.2') #import our library
+
+TELLSTICK_TEMPERATURE = 1;
+TELLSTICK_HUMIDITY = 2;
+
+#function to be called when a sensor event occurs		
+def callbackfunction(protocol, model, id, dataType, value, timestamp, callbackId, context):
+	
+	print "Sensor:", string_at(protocol), string_at(model), "id:", id
+	if(dataType == TELLSTICK_TEMPERATURE):
+		print "Temperature:", string_at(value), "C,", datetime.fromtimestamp(timestamp)
+	elif(dataType == TELLSTICK_HUMIDITY):
+		print "Humidity:", string_at(value), "%,", datetime.fromtimestamp(timestamp)
+	print ""
+
+
+if (platform.system() == 'Windows'):
+	CMPFUNC = WINFUNCTYPE(c_void_p, POINTER(c_ubyte), POINTER(c_ubyte), c_int, c_int, POINTER(c_ubyte), c_int, c_int, c_void_p) #first is return type
+else:
+	CMPFUNC = CFUNCTYPE(c_void_p, POINTER(c_ubyte), POINTER(c_ubyte), c_int, c_int, POINTER(c_ubyte), c_int, c_int, c_void_p)
+
+cmp_func = CMPFUNC(callbackfunction)
+
+lib.tdInit()
+callbackid = lib.tdRegisterSensorEvent(cmp_func, 0)
+
+print "Waiting for events..."
+try:
+	while(1):
+		time.sleep(0.5) #don't exit
+except KeyboardInterrupt:
+	print "Exiting"
+	lib.tdUnregisterCallback(callbackid)
+	lib.tdClose()