# Smart Irrigation System with Temperature Monitoring
# Updated: 22/04/2026
from machine import Pin, ADC, PWM
import dht
import time

# --- Setup Pins ---
pot = ADC(Pin(34))
pot.atten(ADC.ATTN_11DB)

dht_sensor = dht.DHT22(Pin(4))

rain_sensor = Pin(14, Pin.IN, Pin.PULL_UP)
water_switch = Pin(27, Pin.IN)
mode_button = Pin(26, Pin.IN, Pin.PULL_UP)

pump = Pin(25, Pin.OUT)
fan = Pin(33, Pin.OUT)
led_blue = Pin(19, Pin.OUT)
led_red = Pin(18, Pin.OUT)

# --- Buzzer Setup (PWM) ---
buzzer = PWM(Pin(15))
buzzer.duty(0)  # Pastikan senyap masa start

def beep(status):
    if status:
        buzzer.freq(1000) # Frekuensi nada bunyi
        buzzer.duty(512)  # Kelantangan (0-1023)
    else:
        buzzer.duty(0)    # Senyap

# --- Threshold ---
DRY_LEVEL = 2000

print("System Ready...")

while True:
    try:
        # Baca sensor
        soil_value = pot.read()
        dht_sensor.measure()
        temp = dht_sensor.temperature()
        
        rain = 1 if rain_sensor.value() == 0 else 0
        water_ok = water_switch.value()
        manual = mode_button.value()

        print(f"Soil: {soil_value} | Temp: {temp}C | Rain: {rain} | Water: {water_ok}")

        # Auto Mode (manual == 1)
        if manual == 1:
            if soil_value < DRY_LEVEL and rain == 0 and water_ok == 1:
                pump.value(1)
                led_red.value(1)
                led_blue.value(0)
                beep(True)  # Buzzer bunyi
            else:
                pump.value(0)
                led_red.value(0)
                led_blue.value(1)
                beep(False) # Buzzer senyap
        
        # Manual Mode (manual == 0)
        else:
            pump.value(0)
            beep(False)
            led_red.value(1)
            led_blue.value(0)

        # Fan control (Auto)
        if temp > 30:
            fan.value(1)
        else:
            fan.value(0)

        time.sleep(1)
        
    except Exception as e:
        print("Error:", e)