既然已经读取卡片的ID,那么就简单实现一个RFID门卡控制LED试试。
import RPi.GPIO as GPIO import mfrc522 import signal import time GPIO.setmode(GPIO.BCM) continue_reading = True # Capture SIGINT for cleanup when the script is aborted def end_read(signal,frame): global continue_reading print ("Ctrl+C captured, ending read.") continue_reading = False GPIO.cleanup() # Hook the SIGINT signal.signal(signal.SIGINT, end_read) # Create an object of the class MFRC522 MIFAREReader = mfrc522.MFRC522() # Welcome message print ("Welcome to the MFRC522 data read example") print ("Press Ctrl-C to stop.") # This loop keeps checking for chips. If one is near it will get the UID and authenticate while continue_reading: # Scan for cards (status,TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL) # If a card is found if status == MIFAREReader.MI_OK: print ("Card detected") # Get the UID of the card (status,uid) = MIFAREReader.MFRC522_Anticoll() # If we have the UID, continue if status == MIFAREReader.MI_OK: # Print UID print ("Card read UID: "+str(uid[0])+","+str(uid[1])+","+str(uid[2])+","+str(uid[3])+','+str(uid[4])) # This is the default key for authentication key = [0xFF,0xFF,0xFF,0xFF,0xFF,0xFF] # Select the scanned tag MIFAREReader.MFRC522_SelectTag(uid) #ENTER Your Card UID here my_uid = [213,179,104,28,18] #Configure LED Output Pin LED = 18 GPIO.setup(LED, GPIO.OUT) GPIO.output(LED, GPIO.LOW) #Check to see if card UID read matches your card UID if uid == my_uid: #Open the Doggy Door if matching UIDs print("Access Granted") GPIO.output(LED, GPIO.HIGH) #Turn on LED time.sleep(5) #Wait 5 Seconds GPIO.output(LED, GPIO.LOW) #Turn off LED else: #Don't open if UIDs don't match print("Access Denied, YOU SHALL NOT PASS!")
MFRC522读卡器接完之后,在GPIO18上接一个LED灯即可。有想法的话把LED换成门锁就是门禁系统了。