from machine import Pin, ADC, time_pulse_us
import time
import dht

# Corrected Pin Configuration
DHT_PIN = 4        # Changed to GPIO4
TRIG_PIN = 13
ECHO_PIN = 2
LDR_PIN = 35
PIR_PIN = 19

# Sensor Initialization
dht_sensor = dht.DHT22(Pin(DHT_PIN))  # Fixed syntax
trig = Pin(TRIG_PIN, Pin.OUT)
echo = Pin(ECHO_PIN, Pin.IN)

# Proper ADC Configuration for LDR
ldr = ADC(Pin(LDR_PIN))
ldr.atten(ADC.ATTN_11DB)  # Full range 0-3.3V
ldr.width(ADC.WIDTH_12BIT)  # 0-4095

pir = Pin(PIR_PIN, Pin.IN)

def read_sensors():
    # DHT22
    try:
        dht_sensor.measure()
        temp = dht_sensor.temperature()
        hum = dht_sensor.humidity()
    except:
        temp, hum = None, None

    # HC-SR04
    trig.value(0)
    time.sleep_us(2)
    trig.value(1)
    time.sleep_us(10)
    trig.value(0)
    duration = time_pulse_us(echo, 1, 30000)
    distance = round(duration * 0.0343 / 2, 2) if duration > 0 else None

    # LDR
    ldr_val = ldr.read()
    light = round(ldr_val / 4095 * 100, 1) if ldr_val is not None else None

    # PIR
    motion = pir.value()

    return temp, hum, distance, ldr_val, light, motion

while True:
    t, h, d, ldr_raw, light, m = read_sensors()

    print("\n=== Sensor Readings ===")
    print(f"🌡️ Temperature: {t}°C" if t else "❌ DHT Error")
    print(f"💧 Humidity: {h}%" if h else "❌ DHT Error") 
    print(f"📏 Distance: {d}cm" if d else "❌ Distance Error")
    print(f"💡 Light: {light}% (Raw: {ldr_raw})" if light else "❌ LDR Error")
    print(f"🏃 Motion: {'DETECTED' if m else 'None'}")

    time.sleep(5)