Python Raspberry Pi GPIO error

I am running the following python script on my Raspberry Pi: http://www.skpang.co.uk/dl/rfid.py I've modified the script towards the end to access the GPIO pin 15 and turn it on and off. Here is my code at the bottom: ``` def example(): rfid = SL030() fw = rfid.get_firmware() print("RFID reader firmware:" + fw) print() GPIO.setmode(GPIO.BOARD) GPIO.setup(15, GPIO.OUT) GPIO.output(15,True) while True: rfid.wait_tag() print("card present") if rfid.select_mifare(): type = rfid.get_type() print("type:" + rfid.get_typename(type)) id = rfid.get_uidstr() try: user = cards[id] print(user) #os.system("aplay " + user) except KeyError: print("Unknown card:" + id) rfid.wait_notag() print("card removed") print() ``` Problem i am facing is that although it operates pin 15, the script halts with the following error: ``` Traceback (most recent call last): File "./rfid.py", line 212, in <module> example() File "./rfid.py", line 182, in example rfid.wait_tag() File "./rfid.py", line 45, in wait_tag while not self.tag_present(): File "./rfid.py", line 40, in tag_present return GPIO.input(CFG_TAG_DETECT) == False RPi.GPIO.InvalidChannelException: The channel sent is invalid on a Raspberry Pi ``` Any ideas what can be wrong? Thanks UPDATE If i put the GPIO code just below the def example(): and above the rfid = SL030() like below, then it seems to work without error: ``` def example(): GPIO.setmode(GPIO.BOARD) GPIO.setup(15, GPIO.OUT) GPIO.output(15,True) rfid = SL030() ``` *UPDATE - SOLUTION* Thanks to André, i changed: ``` GPIO.setmode(GPIO.BOARD) ``` to: GPIO.setmode(GPIO.BCM) and then changed the port to match the BCM port like this: ``` GPIO.setup(22, GPIO.OUT) GPIO.output(22,True) ```