DoorLaser -- using a garage door laser beam to detect people walking through a doorway

main.py

#borrowed from https://www.hackster.io/hardikrathod/pir-motion-sensor-with-raspberry-pi-415c04
#and https://raspberrypihq.com/use-a-push-button-with-raspberry-pi-gpio/

import RPi.GPIO as GPIO
import time
#import sys
#from influxdb import InfluxDBClient
import requests
import automationhat


# Set this variables, influxDB should be localhost on Pi
host = "localhost"
port = 8086
#user = "root"
#password = "root"

# The database we created
dbname = "laser"

#sample period
interval = 0.05

GPIO.setwarnings(False)
GPIO.setmode(GPIO.BCM)
GPIO.setup(15, GPIO.IN, pull_up_down=GPIO.PUD_UP) #laser

curr_time = 0
prev_time = 0
count = 0
print("Starting program",  time.time(), "GPIO 15RX:", GPIO.input(15))
try:
    while True:
        if GPIO.input(15):
            curr_time = time.time()
            print("Laser Broken!", time.time(), "Diff:", curr_time - prev_time, "Count:", count)
            if curr_time - prev_time > 0.15 and count > 1:
                data = 'laserdoor value=1'
                print(requests.post('http://localhost:8086/write?db=laser', data=data))
                count = 0
            elif curr_time - prev_time <= 0.15:
                count = count + 1
            else:
                count = 0
            prev_time=curr_time
        time.sleep(interval)

except:
    GPIO.cleanup()
    print("\nBye, bye!")