import machine
import dht
import time

# DHT11 on GP15 (better than GP28)
sensor = dht.DHT11(machine.Pin(28))

# LEDs
led_cold = machine.Pin(14, machine.Pin.OUT)
led_moderate = machine.Pin(13, machine.Pin.OUT)
led_hot = machine.Pin(12, machine.Pin.OUT)

# Temperature thresholds (°C)
cold_max = 19       # <=19°C → Cold
moderate_min = 20   # 20–30°C → Moderate
moderate_max = 30
hot_min = 31        # >=31°C → Hot

while True:
    try:
        sensor.measure()  # Take a reading
        temp = sensor.temperature()
        hum = sensor.humidity()
        
        # Some sanity check
        if temp > 60 or temp < 0:
            print("Invalid temperature reading, retrying...")
            time.sleep(2)
            continue
        
        print("Temperature:", temp, "°C  Humidity:", hum, "%")
        
        # Turn off all LEDs first
        led_cold.value(0)
        led_moderate.value(0)
        led_hot.value(0)
        
        # Turn on LED based on temperature
        if temp <= cold_max:
            led_cold.value(1)
            print("Status: Cold")
        elif moderate_min <= temp <= moderate_max:
            led_moderate.value(1)
            print("Status: Moderate")
        elif temp >= hot_min:
            led_hot.value(1)
            print("Status: Hot")
    
    except OSError as e:
        print("Failed to read sensor:", e)
    
    time.sleep(2)  # DHT11 needs at least 1-2s between reads