#SC_07_i2c_scan.py
from machine import Pin, SoftI2C
import ssd1306

i2c = SoftI2C(scl=Pin(22), sda=Pin(21), freq=400000)

i2c = I2C(0, scl=Pin(22), sda=Pin(21), freq=10000) # ลดความเร็วลง

print("Scanning I2C (Low Speed)...")
devices = i2c.scan()

if devices:
    for device in devices:
        print(f"Decimal: {device} | Hex: {hex(device)}")
else:
    print("No device found")