from machine import Pin, I2C, ADC, PWM
import ssd1306
import time

# OLED
i2c = I2C(0, scl=Pin(1), sda=Pin(0), freq=400000)
oled = ssd1306.SSD1306_I2C(128, 64, i2c)

# Potensiometer (ADC)
pot = ADC(Pin(26))

# LED PWM
led = PWM(Pin(16))
led.freq(1000)

while True:
    raw = pot.read_u16()             # 0 - 65535
    voltage = raw * 3.3 / 65535      # Konversi ke voltase
    duty = raw                       # PWM duty cycle = nilai ADC
    led.duty_u16(duty)               # Set kecerahan LED
    
    brightness_pct = int(raw / 65535 * 100)
    
    oled.fill(0)
    oled.text("LED Controller", 0, 0)
    oled.text("-" * 16, 0, 10)
    oled.text("Voltase:", 0, 22)
    oled.text(f"{voltage:.2f} V", 20, 34)
    oled.text("Brightness:", 0, 46)
    oled.text(f"{brightness_pct} %", 20, 56)
    oled.show()
    
    time.sleep(0.1)