import machine
from hcsr04 import HCSR04
import time
from lcd_api.py import LcdApi
from i2c_lcd.py import I2cLcd
# Define GPIO pin numbers for the ultrasonic sensor
trigger_pin = 13  # GPIO15 (D15)
echo_pin = 12     # GPIO13 (D13)

# Define the GPIO pins connected to the buzzer and LED
buzzer_pin = machine.Pin(15, machine.Pin.OUT)  # GPIO2 (D2)
led_pin = machine.Pin(2, machine.Pin.OUT)      # GPIO4 (D4)
# variables for LCD
I2C_Addr = 0x27
totalRows = 2
totalColumns = 16

i2c = SoftI2C(scl=Pin(22), sda=Pin(21), freq=10000)

lcd = I2cLcd(i2c, I2C_Addr, totalRows. totalColumns, freq=10000)
# Create an HCSR04 object with trigger and echo pins
sensor = HCSR04(trigger_pin, echo_pin)

# Define the distance threshold for activation (in centimeters)
activation_distance = 20  # Adjust this value as needed

while True:
    try:
        distance = sensor.distance_cm()
        print("Distance:", distance, "cm")

        if distance <= activation_distance:
            print("open")
            lcd.putstr("Someone opened the door!")
            buzzer_pin.on()
            for _ in range(5):  # Blink the LED 5 times
                led_pin.on()
                time.sleep(0.5)
                led_pin.off()
                time.sleep(0.5)
            buzzer_pin.off()
            lcd.clear
        else:
            buzzer_pin.off()
            lcd.putstr("Door is closed")
            led_pin.off()
            print("close")
            lcd.clear

    except OSError as e:
        print("Error reading distance:", e)

    time.sleep(0.5)  # Adjust the update rate as needed