from machine import Pin
from machine import PWM
from time import sleep
import dht
 
sensor = dht.DHT22(Pin(2))
nitrogen = dht.DHT22(Pin(4))
phosphorus = dht.DHT22(Pin(5))
potassium = dht.DHT22(Pin(6))
pwm = PWM(Pin(0))
pwm.freq(50)
led = Pin(21, Pin.OUT)

def servo():
    for position in range(1000,9000,50):
            pwm.duty_u16(position)
            sleep(0.01)
    for position in range(9000,1000,-50):
            pwm.duty_u16(position)
            sleep(0.01)

while True:
    #Temp & Humidity Read
    sensor.measure()
    nitrogen.measure()
    phosphorus.measure()
    potassium.measure()
    temp = sensor.temperature()
    hum = sensor.humidity()
    nit = nitrogen.humidity()
    pho = phosphorus.humidity()
    pot = potassium.humidity()
    print("Temperature: {}°C   Soil Moist: {:.0f}% ".format(temp, hum))
    print("Nitrogen: {} mg/kg ".format(nit))
    print("Phosphorus: {} mg/kg ".format(pho))
    print("Potassium: {} mg/kg ".format(pot))
    sleep(2)
    
    if temp > 38 and hum < 20:
        servo()
        led.toggle()
    elif hum < 20:
        led.toggle()
    elif temp < 20:
        led.toggle()
    elif nit or pho or pot < 50:
        led.toggle()