import machine 
from machine import SoftI2C, Pin ,PWM

from lcd_api import LcdApi 
from i2c_lcd import I2cLcd
from ssd1306 import SSD1306_I2C

from time import sleep

import dht
sensor = dht.DHT22(Pin(14))

I2C_ADDR_LCD = 0x27
I2C_ADDR_OLED = 0x3c
oled_width = 128
oled_height = 64 
lcd_Rows = 2 
lcd_Columns = 16

buzzer_pin = Pin(4, Pin.OUT)
buzzer_pwm = PWM(buzzer_pin)
buzzer_pwm.freq(500)  # Set PWM frequency

i2c = SoftI2C(scl=Pin(22), sda=Pin(21), freq=10000) 	#initializing the I2C method for ESP32 

lcd = I2cLcd(i2c, I2C_ADDR_LCD, lcd_Rows, lcd_Columns)
oled = SSD1306_I2C(oled_width, oled_height, i2c, I2C_ADDR_OLED)

lcd.move_to(1,0)

def activate_buzzer():
    buzzer_pwm.duty(512)  # 50% duty cycle

def deactivate_buzzer():
    buzzer_pwm.duty(0)  # Turn off the buzzer

def print_large_text(text, x, y):
    scale = 3  # You can adjust this value to change the size of the text
    for char in text:
        oled.text(char, x, y, 1)
        x += 12 * scale  # 8 pixels wide for each character, adjust if using a different font


oled.text('ESP32 with OLED', 3, 6, 1)
oled.show()

while True:
  try:
     sleep(2)
     sensor.measure()
     temp = sensor.temperature()
     hum = sensor.humidity()
     temp_f = temp * (9/5) + 32.0
     print('Temperature: %.1f C' %temp)    
     print('Temperature: %.1f F' %temp_f)
     print('Humidity: %.1f %%' %hum)
      
     print('Temp in C:',temp,'C')
     print('')

     if temp > 55:  # If an object is closer than 100cm
            activate_buzzer()
     else:
            deactivate_buzzer()
        

     lcd.move_to(0,0)
     lcd.putstr('temp:'+str(temp)+'C')
     lcd.move_to(0,1)
     lcd.putstr('hum:'+str(hum)+'%')
   
     oled.text('Temperature:'+str(temp)+'C', 0, 26,1)
     oled.text('Humidity: '+str(hum)+'%' , 0, 36,1)
     oled.show()
     oled.fill(0)    #to clear the screen
  except OSError as e:
    print('Failed to read sensor.')