#Smart Parking System Using Micropython ESP32
#Created by Alif Iman
#5/12/2023

from machine import Pin, PWM, SoftI2C
from utime import sleep, sleep_ms
import oled
import time
import network
import urequests

#Declare LED & Buzzer Pin 
led_green = Pin(12, Pin.OUT)
led_red = Pin(26, Pin.OUT)
buzzer = PWM(Pin(14), Pin.OUT)  # Assuming pin 14 for the buzzer

#Pin Declaration for oled
Pin_scl_sda = SoftI2C(scl=Pin(22), sda=Pin(23))

#create an object name using opp (object oriented programming)
# library nama.class name
skrin = oled.SSD1306_I2C(width=128, height=64, i2c=Pin_scl_sda)

# initialize the PIR sensor on pin 27, LED on pin 12, buzzer on pin 14, and servo motor on pin 21
pir_sensor = Pin(27, Pin.IN)
sg90 = PWM(Pin(21, mode=Pin.OUT))  # SERVO MOTOR = TOLL BAR
sg90.freq(50)

# initialize the PIR sensor on pin 27, LED on pin 12, buzzer on pin 14, and servo motor on pin 21
sg901 = PWM(Pin(19, mode=Pin.OUT))  # SERVO MOTOR = TOLL BAR
sg901.freq(50)

# Blynk Auth Token
BLYNK_AUTH = "Your_Blynk_Auth_Token"

# Connect to Blynk server
def connect_to_blynk():
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    wlan.connect('Your_WiFi_SSID', 'Your_WiFi_Password')
    while not wlan.isconnected():
        pass
    print("Connected to SMART TEC CAR")
    sleep(1)
    print("Connecting to Blynk...")
    sleep(1)
    # Make a GET request to Blynk server to establish connection
    urequests.get('http://blynk-cloud.com/' + BLYNK_AUTH + '/isHardwareConnected')
    print("Connected to Blynk")

# loop forever
while True:
    led_red.on() #during the toll bar is closed
    led_green.off() #during the toll bar is open
    # check if motion is detected by the PIR sensor
    if pir_sensor.value() == 1:
        skrin.fill(1)
        skrin.text("DEAR OWNER",0,10,0)
        skrin.text(" OBJECTED DETECTED",0,20,0)
        skrin.text("PLS ENSURE SAFTY",0,30,0)
        
        skrin.show() #a must
        for i in range (2):
            buzzer.init(freq=1500, duty = 400)
            sleep(0.5)
            buzzer.init(freq=1, duty = 0)
            sleep(0.5)
            led_red.on()

        # Connect to Blynk
        connect_to_blynk()

        #Move the servo motor to 180 degrees
        le