from machine import Pin , SoftI2C , ADC 
import time
import dht
sensor = dht.DHT22(Pin(14))
sys = Pin(17 , Pin.IN , Pin.PULL_UP)
light_sensor = ADC(12)
from ssd1306 import SSD1306_I2C
i2c = SoftI2C(scl=Pin(22) , sda = Pin(21) , freq=400000)
width , height = 128 , 64 
oled = SSD1306_I2C(width , height , i2c)
oled.invert(True)
while 1 :
    reading = sys.value()
    print('system off ')
    while reading == 1 :
        print('system on')
        reading = sys.value()
        if reading == 0: break 
        sensor.measure()
        t = sensor.temperature()
        h = sensor.humidity()
        light = 65535 -  light_sensor.read_u16()
        light = int(light * (100/65535))
        if light > 30 : oled.invert(True)
        else : oled.invert(False)
        oled.text(f'temp :{t} C',10,10)
        oled.text(f'hum :{h} %',10,20)
        oled.text(f'light {light} %' ,10,30)
        oled.show()
        time.sleep_ms(1)
        oled.fill(0)