- added RFID tag reading with the MFRC522 lib

app/rfid.py

@@ -0,0 +1,37 @@
+try:
+    import MFRC522
+except:
+    print "ERROR: Need MFRC522 Library to read RFID tags, disable RFID if no reader is present!"
+    exit()
+import signal
+import thread
+
+
+class RFID:
+
+    def __init__(self, callbackf):
+        self.reader = MFRC522.MFRC522()
+        signal.signal(signal.SIGINT, self.stop)
+        self.callback = callbackf
+        self.loop = True
+        thread.start_new_thread(self.read, ())
+
+    def read(self):
+        while self.loop:
+            (status, tagtype) = self.reader.MFRC522_Request(self.reader.PICC_REQIDL)
+            print "RFID Status:", status 
+            if status == self.reader.MI_OK:
+                (status, uid) = self.reader.MFRC522_Anticoll()
+                if status == self.reader.MI_OK:
+                    uids = "0x" + "".join(format(x, '02x') for x in uid)
+                    self.callback(uids)
+                    print "RFID Detect:",uids
+
+    def start(self):
+        print "RFID reader started"
+        self.loop = True
+        thread.start_new_thread(self.read, ())
+
+    def stop(self):
+        print "RFID reader stopped"
+        self.loop = False