from machine import Pin, I2C
import dht
import time

# I2C Setup
i2c = I2C(0, scl=Pin(22), sda=Pin(21), freq=400000)

# Alamat LCD biasanya 0x27 di Wokwi
LCD_ADDR = 0x27

# Fungsi kirim data ke LCD 
def lcd_send(addr, data, mode):
    # Mode: 0 untuk command, 1 untuk data
    # 0x08 digunakan untuk menjaga Backlight tetap menyala
    buf = [(data & 0xF0) | mode | 0x08, (data & 0xF0) | mode | 0x0C, (data & 0xF0) | mode | 0x08]
    i2c.writeto(addr, bytes(buf))
    buf = [((data << 4) & 0xF0) | mode | 0x08, ((data << 4) & 0xF0) | mode | 0x0C, ((data << 4) & 0xF0) | mode | 0x08]
    i2c.writeto(addr, bytes(buf))

def lcd_init(addr):
    # Inisialisasi LCD mode 4-bit
    for cmd in [0x33, 0x32, 0x28, 0x0C, 0x06, 0x01]:
        lcd_send(addr, cmd, 0)
        time.sleep_ms(5)

# Inisialisasi
lcd_init(LCD_ADDR)
sensor = dht.DHT22(Pin(14)) # Sesuai Pin di gambar kamu

while True:
    try:
        sensor.measure()
        t = sensor.temperature()
        h = sensor.humidity()
        
        # Cetak ke Serial untuk memastikan data terbaca
        print("Suhu: {:.1f} C, Hum: {:.1f} %".format(t, h))
        
        # --- Tampilkan Baris 1 ---
        lcd_send(LCD_ADDR, 0x80, 0) # Alamat awal Baris 1
        for char in "Suhu: {:.1f} C ".format(t):
            lcd_send(LCD_ADDR, ord(char), 1)
            
        # --- Tampilkan Baris 2 ---
        lcd_send(LCD_ADDR, 0xC0, 0) # Alamat awal Baris 2
        for char in "Hum : {:.1f} % ".format(h):
            lcd_send(LCD_ADDR, ord(char), 1)
            
    except Exception as e:
        print("Error baca sensor:", e)
        # Tampilkan error di LCD jika gagal
        lcd_send(LCD_ADDR, 0x01, 0) # Clear Screen
        lcd_send(LCD_ADDR, 0x80, 0)
        for char in "Sensor Error":
            lcd_send(LCD_ADDR, ord(char), 1)

    # Jeda 2 detik (DHT22 tidak bisa dipaksa baca terlalu cepat)
    time.sleep(2)