Communication Protocol Structure: Start code + length + network number + serial number + operation code + content + check code.

• Start code: Fixed to 0x5a/0xa5
• Length: Total bytes (network number + serial number + opcode + content)
• Network number: 4-byte code (FF,FF,FF,FF acts as a common number for connection)
• Serial number: 0 -> Lamp 1; 1 -> Lamp 2
• Operation codes:
  0x50: Extract network number / Terminal returns version number
  0x51: Read terminal status
  0x52: Switch/dimming operation (0: off, 1-100: dimming)
  0x53: Remote IP/COM modification
  0x54: Synchronize time/working mode
  0x55: Read time/working mode
  0x56: Classification/group operation
  0x57: Read charged quantity information
• Check code: Sum of network code, serial number, opcode, and content (type byte)