{
  "protocol_name": "CCU参数设置反馈",
  "message_id": "0x0040",
  "length": 10,
  "checksum": {
    "start_offset": 0,
    "end_offset": 6,
    "algorithm": "sum"
  },
  "fields": [
    {
      "name": "start1",
      "offset": 0,
      "type": "uint8",
      "value": "0x20",
      "description": "起始字节1"
    },
    {
      "name": "start2",
      "offset": 1,
      "type": "uint8",
      "value": "0x20",
      "description": "起始字节2"
    },
    {
      "name": "id",
      "offset": 2,
      "type": "uint16",
      "value": "0x0040",
      "description": "消息ID"
    },
    {
      "name": "length",
      "offset": 4,
      "type": "uint16",
      "value": 10,
      "description": "消息长度"
    },
    {
      "name": "flag",
      "offset": 6,
      "type": "uint8",
      "description": "设置标志位"
    },
    {
      "name": "failvreCode",
      "offset": 7,
      "type": "uint8",
      "description": "故障代码"
    }
  ]
}