import os.path
import csv
import picamera
import RPi.GPIO as GPIO
import time
import datetime

sensor = 23
busy = False

GPIO.setmode(GPIO. BCM)
GPIO.setwarnings(False)   
GPIO.setup(sensor, GPIO.IN, pull_up_down = GPIO.PUD_UP)

today = datetime.datetime.now()
filename = '/home/pi/recording' + today.strftime('%Y%m%d-%H:%M:%S') + '.h264'

def cameraOn():
    with picamera.PiCamera() as camera:
        camera.resolution = (640, 480)
        camera.start_preview()
        time.sleep(2)
        camera.start_recording(filename)
        camera.wait_recording(5)
        camera.stop_recording()
        return False

try:
    while True:
        value=GPIO.input(sensor)
        if value != 0 and busy != True:
            print('CAMERA ON')
            busy = cameraOn()
            print('CAMERA OFF')
        else:
            print('NO DETECT')

        time.sleep(1)

except KeyboardInterrupt:
    pass
GPIO.cleanup()