from machine import Pin, SPI
import time

# Initialize SPI0 
spi = SPI(0, baudrate=100000, polarity=0, phase=0, sck=Pin(2), mosi=Pin(3), miso=Pin(4))
cs = Pin(5, Pin.OUT, value=1) # Active LOW

while True:
    message = b'\x01\x02\x03'
    
    # Assert CS pin (low) to start communication
    cs.value(0)
    
    # Write data to the Target
    spi.write(message)
    
    # De-assert CS pin
    cs.value(1)
    
    print("Sent:", message)
    time.sleep(1)