ELAB-RFID-locks/cardlistener.py

import time, json
import RPi.GPIO as GPIO
import keyboard
import subprocess

pin_config = []

def btnBlink():
    for i in range(3):
        GPIO.output(pin_config['fridge_red_LED'], GPIO.HIGH)
        time.sleep(0.02)
        GPIO.output(pin_config['fridge_grn_LED'], GPIO.HIGH)
        time.sleep(0.02)
        GPIO.output(pin_config['tools_red_LED'], GPIO.HIGH)
        time.sleep(0.02)
        GPIO.output(pin_config['tools_grn_LED'], GPIO.HIGH)
        time.sleep(0.02)
        GPIO.output(pin_config['fridge_red_LED'], GPIO.LOW)
        time.sleep(0.02)
        GPIO.output(pin_config['fridge_grn_LED'], GPIO.LOW)
        time.sleep(0.02)
        GPIO.output(pin_config['tools_red_LED'], GPIO.LOW)
        time.sleep(0.02)
        GPIO.output(pin_config['tools_grn_LED'], GPIO.LOW)
        time.sleep(0.02)

if __name__ == '__main__':
    with open('pin_config.json') as pin_config_stream:
        pin_config = json.load(pin_config_stream)
    if pin_config['mode'] == 'BOARD':
        GPIO.setmode(GPIO.BOARD)
    else:
        GPIO.setmode(GPIO.BCM)
    GPIO.setup(pin_config['fridge_btn'], GPIO.IN, pull_up_down=GPIO.PUD_UP)
    GPIO.setup(pin_config['tools_btn'], GPIO.IN, pull_up_down=GPIO.PUD_UP)
    GPIO.setup(pin_config['fridge_red_LED'], GPIO.OUT)
    GPIO.setup(pin_config['fridge_grn_LED'], GPIO.OUT)
    GPIO.setup(pin_config['tools_red_LED'], GPIO.OUT)
    GPIO.setup(pin_config['tools_grn_LED'], GPIO.OUT)

    GPIO.output(pin_config['fridge_grn_LED'], GPIO.LOW)
    GPIO.output(pin_config['tools_grn_LED'], GPIO.LOW)
    GPIO.output(pin_config['fridge_red_LED'], GPIO.LOW)
    GPIO.output(pin_config['tools_red_LED'], GPIO.LOW)

    while True:
        print "Enter card ID:"
        cardID_input = keyboard.record(until='enter')
        cardID = keyboard.get_typed_strings(cardID_input)[0]
        event = {}
        event["time"] = time.time()
        event["cardID"] = cardID
        event["name"] = ''
        event["action"] = ''
        try:
            with open('cards/' + cardID + '.json') as card_data:
                data = json.load(card_data)
                event["name"] = data['name']
                if data['secretTools']:
                    GPIO.output(pin_config['tools_grn_LED'], GPIO.HIGH)
                else:
                    GPIO.output(pin_config['tools_red_LED'], GPIO.HIGH)
                if data['fridge']:
                    GPIO.output(pin_config['fridge_grn_LED'], GPIO.HIGH)
                else:
                    GPIO.output(pin_config['fridge_red_LED'], GPIO.HIGH)
                timeout = time.time() + 5 # 5 seconds timeout
                wait = True
                while wait:
                    if data['secretTools'] and GPIO.input(pin_config['tools_btn']) == 0:
                        GPIO.output(pin_config['fridge_grn_LED'], GPIO.LOW)
                        GPIO.output(pin_config['tools_grn_LED'], GPIO.LOW)
                        GPIO.output(pin_config['fridge_red_LED'], GPIO.LOW)
                        GPIO.output(pin_config['tools_red_LED'], GPIO.LOW)
                        event['action'] = 'tools'
                        wait = False
                        # Open tools
                        subprocess.call("/home/pi/ELAB-RFID-I2C/RPi/i2c_challenge 0x30", shell=True)
                    if data['fridge'] and GPIO.input(pin_config['fridge_btn']) == 0:
                        GPIO.output(pin_config['fridge_grn_LED'], GPIO.LOW)
                        GPIO.output(pin_config['tools_grn_LED'], GPIO.LOW)
                        GPIO.output(pin_config['fridge_red_LED'], GPIO.LOW)
                        GPIO.output(pin_config['tools_red_LED'], GPIO.LOW)
                        event['action'] = 'fridge'
                        wait = False
                        # Open fridge
                        subprocess.call("/home/pi/ELAB-RFID-I2C/RPi/i2c_challenge 0x20", shell=True)

                    if time.time() > timeout:
                        GPIO.output(pin_config['fridge_grn_LED'], GPIO.LOW)
                        GPIO.output(pin_config['tools_grn_LED'], GPIO.LOW)
                        GPIO.output(pin_config['fridge_red_LED'], GPIO.LOW)
                        GPIO.output(pin_config['tools_red_LED'], GPIO.LOW)
                        wait = False
        except:
            btnBlink()
            print "Card not registered."
        history = []
        try:
            with open('history.json', 'r') as json_data:
                history = json.load(json_data)
        except:
            print 'Initializing new history file.'
        finally:
            history.append(event)
        with open('history.json', 'w') as outfile:
            json.dump(history, outfile)