from machine import Pin, I2C
from ssd1306 import SSD1306_I2C
import dht
import time
import utime

#US Pin Declare
trigger = Pin(11, Pin.OUT)
echo = Pin(10, Pin.IN)

#DHT22 Pin
data_pin = Pin(13, Pin.IN, Pin.PULL_UP)
sensor = dht.DHT22(data_pin)

#SSD1306 Display
WIDTH =128
HEIGHT= 64
#Create the I2C connection
i2c=I2C(0,scl=Pin(17),sda=Pin(16),freq=200000)
#Initialize the OLED display
oled = SSD1306_I2C(WIDTH,HEIGHT,i2c)



def ultra():
    trigger.low()
    utime.sleep_us(2)
    trigger.high()
    utime.sleep_us(5)
    trigger.low()

    while echo.value() == 0:
        signaloff = utime.ticks_us()

    while echo.value() == 1:
        signalon = utime.ticks_us()

    timepassed = signalon - signaloff
    distance = (timepassed * 0.0343) / 2
    print("The distance from object is ", distance, "cm")
    oled.text("{:.2f} cm".format(distance),4,56) 
    


def read_sensor():
    try:
        sensor.measure()
        temperature = sensor.temperature()
        humidity = sensor.humidity()
        print_dht22_data(temperature, humidity)
    except OSError as e:
        print("Error reading data from the sensor")

      

def print_dht22_data(temperature, humidity):
    print("Temperature:{}, Humidity:{}".format(temperature, humidity))
    oled.text("Temp.",4,8)
    oled.text("Humid.",4,20)
    oled.text(str(temperature),65,8)
    oled.text(str(humidity),65,20)
   




while True:

    
    oled.fill(0)
    
    ultra()
    utime.sleep(1)
    
    read_sensor()
    utime.sleep(1)
     
    oled.show()
    time.sleep(2)