from machine import ADC, Pin
import math,time
import dht 
import machine, onewire, ds18x20
def handle_interrupt(pin):
  global motion
  motion = True
  global interrupt_pin
  interrupt_pin = pin 
def calculate_resistance():
  value = adc.read()  
  voltage_ratio = value / (4095 - value)
  return 10e3 * voltage_ratio
def calculate_lux(resistance):
  return 10 * math.pow(rl10/resistance, 1/gamma)


motion = False
pir = Pin(15, Pin.IN)
pir.irq(trigger=Pin.IRQ_RISING, handler=handle_interrupt)
adc = ADC(Pin(14))  
adc.atten(ADC.ATTN_11DB) 
rl10 = 50e3     #LDR resistance at 10lux
gamma = 0.7     #log(Ra/Rb) / log(La/Lb) 
sensor = dht.DHT22(Pin(4))
ds_pin = machine.Pin(2)
ds_sensor = ds18x20.DS18X20(onewire.OneWire(ds_pin))
roms = ds_sensor.scan()
print('Found DS devices: ', roms)



while 1:
    if motion:
        resistance = calculate_resistance()
        print('Lux:', round(calculate_lux(resistance),1))
        sensor.measure()
        temp = sensor.temperature()
        hum = sensor.humidity()
        print('Temperature: %3.1f C' %temp)
        print('Humidity: %3.1f %%' %hum) 
        ds_sensor.convert_temp()
        time.sleep_ms(750)
        for rom in roms:
            print(ds_sensor.read_temp(rom))
        time.sleep(5)
        motion = False