The idea that I have got in my mind is use NFC tags to open doors. In this project I want to use a Raspberry Pi 3
- Raspberry Pi 3
- RFID/NFC Sensor MFRC522 (http://playground.arduino.cc/Learning/MFRC522)
- 3 LEDS
- 4 Resistors
- 1 Push button
- RC522 VCC > RP 3V3
- RC522 RST > RPGPIO25
- RC522 GND > RP Ground
- RC522 MISO > RPGPIO9 (MISO)
- RC522 MOSI > RPGPIO10 (MOSO)
- RC522 SCK > RPGPIO11 (SCLK)
- RC522 NSS > RPGPIO8 (CE0)
- RC522 IRQ > RPNone
I'm going to use two Python Scripts. One to control NFC reader
import RPi.GPIO as gpio
import MFRC522
import sys
import time
MIFAREReader = MFRC522.MFRC522()
GREEN = 11
RED = 13
YELLOW = 15
SERVO = 12
gpio.setup(GREEN, gpio.OUT, initial=gpio.LOW)
gpio.setup(RED, gpio.OUT, initial=gpio.LOW)
gpio.setup(YELLOW, gpio.OUT, initial=gpio.LOW)
gpio.setup(SERVO, gpio.OUT)
p = gpio.PWM(SERVO, 50)
good = [211, 200, 106, 217, 168]
def servoInit():
print "servoInit"
p.start(7.5)
def servoOn():
print "servoOn"
p.ChangeDutyCycle(4.5)
def servoNone():
print "servoOn"
p.ChangeDutyCycle(7.5)
def servoOff():
print "servoOff"
p.ChangeDutyCycle(10.5)
def clean():
gpio.output(GREEN, False)
gpio.output(RED, False)
gpio.output(YELLOW, False)
def main():
servoInit()
while 1:
(status, TagType) = MIFAREReader.MFRC522_Request(MIFAREReader.PICC_REQIDL)
if status == MIFAREReader.MI_OK:
(status, backData) = MIFAREReader.MFRC522_Anticoll()
gpio.output(YELLOW, True)
if status == MIFAREReader.MI_OK:
mac = []
for x in backData[0:-1]:
mac.append(hex(x).split('x')[1].upper())
print ":".join(mac)
if good == backData:
servoOn()
gpio.output(GREEN, True)
time.sleep(0.5)
servoNone()
else:
gpio.output(RED, True)
servoOff()
time.sleep(0.5)
servoNone()
time.sleep(1)
gpio.output(YELLOW, False)
gpio.output(RED, False)
if __name__ == '__main__':
try:
main()
except KeyboardInterrupt:
print 'Interrupted'
clean()
MIFAREReader.GPIO_CLEEN()
sys.exit(0)And another one to control push button
import RPi.GPIO as gpio
import time
gpio.setwarnings(False)
gpio.setmode(gpio.BOARD)
BUTTON = 40
GREEN = 11
RED = 13
YELLOW = 15
gpio.setup(GREEN, gpio.OUT)
gpio.setup(RED, gpio.OUT)
gpio.setup(YELLOW, gpio.OUT)
gpio.setup(BUTTON, gpio.IN, pull_up_down=gpio.PUD_DOWN)
gpio.add_event_detect(BUTTON, gpio.RISING)
def leds(status):
gpio.output(YELLOW, status)
gpio.output(GREEN, status)
gpio.output(RED, status)
def buttonCallback(pin):
if gpio.input(pin) == 1:
print "STOP"
leds(True)
time.sleep(0.2)
leds(False)
time.sleep(0.2)
leds(True)
time.sleep(0.2)
leds(False)
gpio.add_event_callback(BUTTON, buttonCallback)
while 1:
pass