DatamanResponse (UORB 消息)
c
uint64 timestamp # 系统运行以来的时间 启动 (微秒)
uint8 client_id
uint8 request_type # id/阅读/写道/清除
uint8 项目 # dm_item_t
uint32 索引
uint8[56] 数据
uint8 STATUS_SUCCESS = 0
uint8 STATUS_FAILURE_ID_ERR = 1
uint8 STATUS_FAILURE_NO_DATA = 2
uint8 STATUS_FAILURE_READ_FAILED = 3
uint8 STATUS_FAILURE_WRITE_FAILED = 4
uint8 STATUS_FAILURE_CLEAR_FAILED = 5
uint8 状态