Receives ACK but nothing happens when I send commands

[wallahi06]

Hey guys! I've tried everything and nothing works. I tried using some of the ruida-laser code but what I want is a way to send simple commands like the 50207 port allows. Btw I got that to work. In the code below I call the "Start Process" using the D8 00 provided by the docs and I recieve ACK but my laser is not doing anything. What is the problem? I've tried swizzling but that wont work. Am I supposed to swizzle the checksum or put the unswizzled checksum togheter with the swizzled payload? Please take a look below and see if you can find a problem.

import os
import sys
import time
from socket import *

host = "192.168.68.163"

class RuidaUdp():
    NETWORK_TIMEOUT = 4000
    INADDR_ANY_DOTTED = '0.0.0.0'  # bind to all interfaces
    SOURCE_PORT = 40200     # used by rdworks in Windows
    DEST_PORT   = 50200     # Ruida Board
    verbose = True          # babble while working
    retry_delay_sec = 0.2   # delay between retries
    retry_delay_sec_max = 5.0  # maximum retry delay

    def __init__(self, host, port=DEST_PORT, localport=SOURCE_PORT):
        self.sock = socket(AF_INET, SOCK_DGRAM)
        localport = os.environ.get("UDPSENDRUIDA_LOCALPORT", str(localport))
        self.sock.bind((self.INADDR_ANY_DOTTED, int(localport)))
        self.sock.connect((host, port))
        self.sock.settimeout(self.NETWORK_TIMEOUT * 0.001)

    def _checksum(self, data):
        cs = sum(data)
        b1 = cs & 0xff
        b0 = (cs >> 8) & 0xff
        return bytes([b0, b1])

    def send(self, data):
        # Add checksum to the payload
        chksum = self._checksum(data)
        buf = chksum + data

        retry = True  # Always retry if there is an error
        while retry:
            self.sock.send(buf)
            try:
                response = self.sock.recv(8)  # timeout raises an exception
            except Exception as e:
                print(f"Error receiving data: {e}")
                break

            if len(response) == 0:
                if self.verbose:
                    print("Received nothing (empty)")
                break

            if response[0] == 0x46:  # 'F' indicates an error
                if self.verbose:
                    print("Received error response, retrying...")
                time.sleep(self.retry_delay_sec)
                if self.retry_delay_sec < self.retry_delay_sec_max:
                    self.retry_delay_sec *= 2
            elif response[0] == 0xc6:  # 'C' indicates acknowledgment
                if self.verbose:
                    print("Received ACK")
                retry = False
            else:
                print(f"Unknown response: {response[0]:02x}")
                break

payload = b"\xD8\x00"  # The fixed data payload
laser = RuidaUdp(host)
laser.send(payload)