import time
from ctypes import c_uint32

import serial

C_UINT32_MAX = c_uint32(-1).value
conn = serial.Serial(
    "COM4",
    baudrate=9600,
    stopbits=serial.STOPBITS_ONE,
    parity=serial.PARITY_NONE,
    bytesize=serial.EIGHTBITS,
    rtscts=False,
    xonxoff=False
)
pixel = C_UINT32_MAX
time.sleep(5)
color = "#ff00ff"
conn.write(int.to_bytes(pixel, length=4, byteorder="big") + bytes.fromhex(color[1:7]) + b"\n")
response = conn.readline()
print(response)
conn.close()