wangfq
0861a1c1f8
事件为不可再生关键数据, QoS/TCP送达不代表业务层落库, 引入应用层闭环: - 应答格式: 回显 msg_id + code/msg, 不带 data - 设备重发: 5s 超时, 同 msg_id/原始 ts, 最多 3 次, 失败留队列 待重连或下一事件合并上报 (MQTT ≤500B / TCP ≤4096B 拆包) - 平台/客户端: 先落库后应答; msg_id 十分钟窗口去重, 重复包答 code=0 不重复入库 - 附正常/应答丢失重发时序图; 命令详表与交互示例同步
458 lines
16 KiB
Markdown
458 lines
16 KiB
Markdown
# DLD960 TCP 接口协议（JSON）
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> 基于《DLD960 串口通信协议》V1.01，提供以太网 TCP 通道的 JSON 交互协议。
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> 适用于上位机、调试工具等直接 TCP 连接场景。
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---
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# 1 通信说明
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## 1.1 连接参数
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| 项目 | 说明 |
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|------|------|
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| 传输层 | TCP |
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| 默认端口 | 5960 |
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| 编码 | UTF-8 |
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| 序列化 | JSON |
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| 帧分隔 | 换行符 `\n`（每个 JSON 对象占一行） |
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| 最大帧长 | 4096 字节 |
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## 1.2 通信模式
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- **请求-响应**：客户端发送命令，设备返回响应（同步或异步）
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- **主动推送**：设备可主动推送数据（线圈数据、事件）
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- **连接保持**：支持长连接，60 秒无数据心跳超时断开
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## 1.3 连接流程
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```
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Client Device (DLD960)
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|--- TCP Connect ------------------>|
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|--- pwd_verify (鉴权) ------------>|
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|<-- 鉴权成功 / 失败 ---------------|
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|--- 命令 1 ----------------------->|
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|<-- 响应 1 ------------------------|
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|--- 命令 2 ----------------------->|
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|<-- 响应 2 ------------------------|
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|<-- 主动推送 (loop_data/event) ----|
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|--- TCP Close / 超时 ------------->|
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```
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---
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# 2 JSON 消息格式
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## 2.1 请求帧
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```json
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{"msg_id":1,"cmd":"dev_info_query","ts":1719000000,"data":{...}}
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```
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| 字段 | 类型 | 必填 | 说明 |
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|------|------|------|------|
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| `msg_id` | uint32 | 是 | 消息序列号，递增，用于请求-响应匹配 |
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| `cmd` | string | 是 | 命令标识符 |
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| `ts` | uint32 | 否 | Unix 时间戳（秒） |
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| `data` | object | 否 | 命令参数 |
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## 2.2 响应帧
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```json
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{"msg_id":1,"cmd":"dev_info_query","ts":1719000001,"code":0,"msg":"success","data":{...}}
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```
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| 字段 | 类型 | 必填 | 说明 |
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|------|------|------|------|
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| `msg_id` | uint32 | 是 | 对应请求的 msg_id |
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| `cmd` | string | 是 | 命令标识符（与请求一致） |
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| `ts` | uint32 | 否 | 响应时间戳 |
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| `code` | int | 是 | 0=成功，非0=错误码 |
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| `msg` | string | 是 | 结果描述 |
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| `data` | object | 否 | 响应数据 |
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## 2.3 主动推送帧
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```json
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{"msg_id":100,"cmd":"loop_data","ts":1719000100,"data":{...}}
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```
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> 设备主动推送无 `code`/`msg` 字段，由 `cmd` 区分类型。
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## 2.4 错误码
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| code | 说明 |
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|------|------|
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| 0 | 成功 |
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| 1 | 参数错误（格式/范围不正确） |
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| 2 | 密码验证失败 / 未鉴权 |
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| 3 | 设备忙 |
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| 4 | 不支持的命令 |
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| 5 | 内部错误 |
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| 6 | 数据超长 |
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| 7 | 连接未鉴权（需先执行 pwd_verify） |
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---
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# 3 命令详表
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| cmd | 说明 | 需鉴权 | 对应串口 |
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|-----|------|--------|----------|
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| `pwd_verify` | 验证设备密码（连接鉴权） | 否 | 0x1C |
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| `dev_serial_set` | 更改设备序列码 | 是 | 0x09 |
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| `dev_info_query` | 查询设备信息 | 是 | 0x10 |
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| `ssc_net_set` | 设置 SSC 网络配置 | 是 | 0x11 |
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| `ssc_net_query` | 查询 SSC 网络配置 | 是 | 0x12 |
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| `iot_net_set` | 设置 IoT 网络配置 | 是 | 0x13 |
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| `iot_net_query` | 查询 IoT 网络配置 | 是 | 0x14 |
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| `iot_topic_set` | 设置设备 Topic | 是 | 0x15 |
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| `iot_topic_query` | 查询设备 Topic | 是 | 0x16 |
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| `pwd_set` | 设置设备密码 | 是 | 0x1D |
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| `factory_reset` | 设备出厂初始化 | 是 | 0x1E |
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| `device_reset` | 设备复位 | 是 | 0x1F |
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| `loop_param_set` | 设置车检器多路参数 | 是 | 0x63 |
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| `loop_param_query` | 读取车检器多路参数 | 是 | 0x64 |
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| `report_config` | 设置主动上报 | 是 | 0xC5 |
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| 主动推送 | | | |
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| `loop_data` | 线圈传感数据（设备→客户端） | — | 0xC0 |
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| `event_report` | 事件上报（设备→客户端，**客户端须应答**，见 §5.2） | — | — |
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---
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# 4 命令详情
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## 4.1 验证设备密码 `pwd_verify`
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> 连接后首个命令，鉴权通过后才能执行其他命令。
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> 60 秒内未鉴权则断开连接。
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**请求：**
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```json
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{"msg_id":1,"cmd":"pwd_verify","ts":1719000000,"data":{"password":"123456"}}
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```
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| data 字段 | 类型 | 说明 |
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|-----------|------|------|
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| `password` | string | 6 位数字密码 |
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**响应（成功）：**
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```json
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{"msg_id":1,"cmd":"pwd_verify","ts":1719000001,"code":0,"msg":"success"}
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```
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**响应（失败）：**
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```json
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{"msg_id":1,"cmd":"pwd_verify","ts":1719000001,"code":2,"msg":"password incorrect"}
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```
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连续 3 次密码错误，设备断开连接并锁定 60 秒。
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## 4.2 更改设备序列码 `dev_serial_set`
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**请求：**
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```json
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{"msg_id":2,"cmd":"dev_serial_set","ts":1719000002,"data":{"dev_serial":"A1B2C3D4E5F6"}}
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```
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**响应：**
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```json
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{"msg_id":2,"cmd":"dev_serial_set","ts":1719000003,"code":0,"msg":"success"}
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```
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## 4.3 查询设备信息 `dev_info_query`
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**请求：**
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```json
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{"msg_id":3,"cmd":"dev_info_query","ts":1719000004}
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```
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**响应：**
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```json
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{"msg_id":3,"cmd":"dev_info_query","ts":1719000005,"code":0,"msg":"success","data":{"dev_serial":"A1B2C3D4E5F6","hard_ver":"1.1","soft_ver":"1.1","model":"DLD960","product_code":"960001","sub_code":{"net":true,"iot":true},"bus":{"bus1":0,"bus2":0,"bus3":0,"bus4":0}}}
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```
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## 4.4 设置 SSC 网络配置 `ssc_net_set`
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**请求：**
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```json
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{"msg_id":4,"cmd":"ssc_net_set","ts":1719000006,"data":{"dev_ip":"192.168.1.100","subnet_mask":"255.255.255.0","route_ip":"192.168.1.1","lssc_ip":"192.168.1.200","dns":"8.8.8.8","port":502}}
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```
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**响应：** 标准成功/失败。
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## 4.5 查询 SSC 网络配置 `ssc_net_query`
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**请求：**
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```json
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{"msg_id":5,"cmd":"ssc_net_query","ts":1719000008}
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```
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**响应：** `data` 字段同 4.4。
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## 4.6 设置 IoT 网络配置 `iot_net_set`
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**请求：**
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```json
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{"msg_id":6,"cmd":"iot_net_set","ts":1719000010,"data":{"host":"mqtt.example.com","port":1883,"client_id":"dld960_A1B2C3D4E5F6","username":"admin","password":"secret"}}
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```
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## 4.7 查询 IoT 网络配置 `iot_net_query`
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**请求：**
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```json
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{"msg_id":7,"cmd":"iot_net_query","ts":1719000012}
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```
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## 4.8 设置设备 Topic `iot_topic_set`
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**请求：**
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```json
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{"msg_id":8,"cmd":"iot_topic_set","ts":1719000014,"data":{"client_id_enable":true,"topic_pub":"dld960/data/A1B2C3D4E5F6","topic_sub":"dld960/cmd/A1B2C3D4E5F6"}}
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```
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## 4.9 查询设备 Topic `iot_topic_query`
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**请求：**
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```json
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{"msg_id":9,"cmd":"iot_topic_query","ts":1719000016}
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```
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## 4.10 设置设备密码 `pwd_set`
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**请求：**
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```json
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{"msg_id":10,"cmd":"pwd_set","ts":1719000018,"data":{"old_password":"123456","new_password":"654321"}}
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```
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## 4.11 设备出厂初始化 `factory_reset`
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**请求：**
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```json
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{"msg_id":11,"cmd":"factory_reset","ts":1719000020}
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```
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> 执行后所有配置恢复出厂值，连接可能断开。
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## 4.12 设备复位 `device_reset`
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**请求：**
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```json
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{"msg_id":12,"cmd":"device_reset","ts":1719000022}
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```
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> 无响应，设备立即复位。
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## 4.13 设置车检器多路参数 `loop_param_set`
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**请求：**
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```json
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{"msg_id":13,"cmd":"loop_param_set","ts":1719000024,"data":{"auto_mode":false,"channels":[{"ch":1,"sensitivity":7,"freq_level":"high","loop_delay":0,"output_mode":"exist","exist_mode":0,"direction_mode":0,"safe_mode":0,"function_mode":0},{"ch":2,"sensitivity":7,"freq_level":"mid_high","loop_delay":5,"output_mode":"enter_pulse","exist_mode":10,"direction_mode":0,"safe_mode":0,"function_mode":0},{"ch":3,"sensitivity":5,"freq_level":"mid_low","loop_delay":0,"output_mode":"exist","exist_mode":0,"direction_mode":1,"safe_mode":5,"function_mode":0},{"ch":4,"sensitivity":8,"freq_level":"low","loop_delay":10,"output_mode":"leave_pulse","exist_mode":15,"direction_mode":0,"safe_mode":0,"function_mode":0}]}}
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```
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| `channels[]` 字段 | 类型 | 范围 | 说明 |
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|-------------------|------|------|------|
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| `ch` | uint8 | 1~4 | 通道号 |
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| `sensitivity` | uint8 | 0~9 | 灵敏度，默认 7 |
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| `freq_level` | string | 见下 | 线圈高低频档位 |
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| `loop_delay` | uint8 | 0~200 | 延时 ×0.1s，最大 20s |
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| `output_mode` | string | 见下 | 输出方式 |
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| `exist_mode` | uint8 | 0~255 | 0=永久，非0=分钟 |
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| `direction_mode` | uint8 | 0~6 | 0=触发，1~6=方向输出 |
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| `safe_mode` | uint8 | 0~255 | 0=关闭，非0=分钟 |
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| `function_mode` | uint8 | 0~15 | 功能模式 |
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**freq_level 枚举：**
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| 值 | 说明 |
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|----|------|
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| `"high"` | 高频 (33nF) |
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| `"mid_high"` | 中高频 (43nF) |
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| `"mid_low"` | 中低频 (66nF) |
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| `"low"` | 低频 (76nF) |
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**output_mode 枚举：**
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| 值 | 说明 |
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|----|------|
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| `"exist"` | 存在输出 |
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| `"enter_pulse"` | 进入脉冲 |
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| `"leave_pulse"` | 离开脉冲 |
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| `"direction"` | 方向判别 |
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## 4.14 读取车检器多路参数 `loop_param_query`
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**请求：**
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```json
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{"msg_id":14,"cmd":"loop_param_query","ts":1719000026}
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```
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**响应：**
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```json
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{"msg_id":14,"cmd":"loop_param_query","ts":1719000027,"code":0,"msg":"success","data":{"auto_mode":false,"channels":[{"ch":1,"sensitivity":7,"freq_level":"high","loop_delay":0,"output_mode":"exist","exist_mode":0,"direction_mode":0,"safe_mode":0,"function_mode":0,"freq_initial":105300,"freq_current":105280,"freq_diff":20},{"ch":2,"sensitivity":7,"freq_level":"mid_high","loop_delay":5,"output_mode":"enter_pulse","exist_mode":10,"direction_mode":0,"safe_mode":0,"function_mode":0,"freq_initial":100200,"freq_current":98700,"freq_diff":1500},{"ch":3,"sensitivity":5,"freq_level":"mid_low","loop_delay":0,"output_mode":"exist","exist_mode":0,"direction_mode":1,"safe_mode":5,"function_mode":0,"freq_initial":78100,"freq_current":0,"freq_diff":0},{"ch":4,"sensitivity":8,"freq_level":"low","loop_delay":10,"output_mode":"leave_pulse","exist_mode":15,"direction_mode":0,"safe_mode":0,"function_mode":0,"freq_initial":62100,"freq_current":62095,"freq_diff":5}]}}
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```
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| 额外字段 | 类型 | 单位 | 说明 |
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|----------|------|------|------|
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| `freq_initial` | uint32 | Hz | 初始频率 |
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| `freq_current` | uint32 | Hz | 当前实时频率（线圈断开时为 0） |
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| `freq_diff` | uint32 | Hz | 频率变化量 |
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## 4.15 设置主动上报 `report_config`
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**请求：**
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```json
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{"msg_id":15,"cmd":"report_config","ts":1719000028,"data":{"sensor_type":12,"enable":true,"once":false,"env_eval":false,"interval":5,"ack_required":false,"timeout":0}}
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```
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| data 字段 | 类型 | 说明 |
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|-----------|------|------|
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| `sensor_type` | uint8 | 传感器类型，12=多路线圈（0x0C） |
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| `enable` | bool | 使能主动上报 |
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| `once` | bool | 仅上报一次 |
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| `env_eval` | bool | 环境评估模式 |
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| `interval` | uint8 | 上报间隔（秒），0=实时 |
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| `ack_required` | bool | 上报是否需要客户端确认 |
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| `timeout` | uint8 | 超时（分钟），0=无限制 |
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---
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# 5 设备主动推送
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主动推送帧与请求-响应共用同一条 TCP 连接，由设备在任意时刻发出。
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## 5.1 线圈传感数据 `loop_data`
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```json
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{"msg_id":100,"cmd":"loop_data","ts":1719000100,"data":{"channels":[{"ch":1,"freq_level":"high","has_car":false,"loop_ok":true,"freq_current":105280,"freq_diff":20,"sensitivity":7,"condition":0,"misc":{"type":"time","value":0}},{"ch":2,"freq_level":"mid_high","has_car":true,"loop_ok":true,"freq_current":98700,"freq_diff":1500,"sensitivity":7,"condition":2,"misc":{"type":"time","value":350}},{"ch":3,"freq_level":"mid_low","has_car":false,"loop_ok":false,"freq_current":0,"freq_diff":0,"sensitivity":5,"condition":0,"misc":{"type":"cut_count","value":3}},{"ch":4,"freq_level":"low","has_car":false,"loop_ok":true,"freq_current":62095,"freq_diff":5,"sensitivity":8,"condition":0,"misc":{"type":"flow_count","value":128}}]}}
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```
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| 通道字段 | 类型 | 说明 |
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|----------|------|------|
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| `ch` | uint8 | 通道号 1~4 |
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| `freq_level` | string | 高低频档位 |
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| `has_car` | bool | 有车/无车 |
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| `loop_ok` | bool | 线圈正常/断开 |
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| `freq_current` | uint32 | 当前频率 (Hz) |
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| `freq_diff` | uint32 | 频率变化量 (Hz) |
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| `sensitivity` | uint8 | 灵敏度等级 |
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| `condition` | uint8 | 环境评估值 |
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| `misc.type` | string | `"time"` / `"cut_count"` / `"flow_count"` |
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| `misc.value` | uint32 | 对应数值 |
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## 5.2 事件上报 `event_report`
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> 方向：设备 → 客户端；**⚠️ 客户端必须应答**（区别于 `loop_data` 的单向推送）
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设备检测到事件时主动推送，非周期性。事件（进车/出车/线圈断开等）是**不可再生的关键数据**，TCP 送达仅保证客户端进程收到，不代表业务层已处理入库，因此引入**应用层应答 + 设备重发**机制闭环确认（与 IoT MQTT 协议 V1.04 §5.3 机制对称）。
|
||
|
||
**设备推送：**
|
||
|
||
```json
|
||
{"msg_id":101,"cmd":"event_report","ts":1719000200,"data":{"events":[{"type":"car_enter","ch":2,"value":0},{"type":"car_leave","ch":2,"value":350}]}}
|
||
```
|
||
|
||
| 事件类型 `type` | 说明 | `value` |
|
||
|----------------|------|---------|
|
||
| `car_enter` | 车辆进入 | 0 |
|
||
| `car_leave` | 车辆离开 | 通过时间 (×5ms) |
|
||
| `loop_cut` | 线圈断开 | 0 |
|
||
| `loop_restore` | 线圈恢复 | 断开持续时长 (×5ms) |
|
||
|
||
**客户端应答（收到后必须立即回复）：**
|
||
|
||
```json
|
||
{"msg_id":101,"cmd":"event_report","ts":1719000201,"code":0,"msg":"success"}
|
||
```
|
||
|
||
| 字段 | 说明 |
|
||
|------|------|
|
||
| `msg_id` | **必须回显**设备推送的 `msg_id`，设备以此匹配确认 |
|
||
| `cmd` | 固定 `"event_report"` |
|
||
| `code` | 0 = 已接收并处理；非 0 = 处理失败（设备视同未确认，进入重发） |
|
||
|
||
**设备端确认与重发机制：**
|
||
|
||
1. 推送 `event_report` 后启动确认定时器，**5s** 内未收到 `msg_id` 匹配且 `code=0` 的应答 → 重发；
|
||
2. 重发使用**相同的 `msg_id` 与原始 `ts`**（首次事件发生时间，不随重发刷新），客户端以此去重；
|
||
3. 最多重发 **3 次**（含首发共 4 次）。仍未确认 → 事件保留在待发队列，待**连接恢复（重新鉴权通过）或下一次事件触发**时合并上报；
|
||
4. 连接断开期间产生的事件同样进入待发队列；等待确认期间新产生的事件合并进下一包 `events` 数组（使用新 `msg_id`），单帧不超过帧长限制（4096 字节）；
|
||
5. 待发队列建议深度 **≥16 条事件**，溢出时丢弃最旧事件（先保新鲜数据）。
|
||
|
||
**客户端要求：**
|
||
|
||
1. 收到 `event_report` **先落库、后应答**，应答即承诺数据已持久化；
|
||
2. 按 `msg_id` 在近期窗口（建议 10 分钟）内去重——重复帧为设备未收到应答所致，**直接应答 `code=0`，不重复入库**（设备重启后 `msg_id` 从头递增，去重必须限定时间窗口；TCP 为点对点连接，无需 `dev_serial` 维度）；
|
||
3. 应答帧保持最小集（不带 `data`），且与请求同为**单行紧凑 JSON + `\n` 结尾**。
|
||
|
||
---
|
||
|
||
# 6 交互示例
|
||
|
||
## 6.1 完整会话
|
||
|
||
```
|
||
>>> {"msg_id":1,"cmd":"pwd_verify","ts":1719000000,"data":{"password":"123456"}}
|
||
<<< {"msg_id":1,"cmd":"pwd_verify","ts":1719000001,"code":0,"msg":"success"}
|
||
|
||
>>> {"msg_id":2,"cmd":"dev_info_query","ts":1719000002}
|
||
<<< {"msg_id":2,"cmd":"dev_info_query","ts":1719000003,"code":0,"msg":"success","data":{...}}
|
||
|
||
>>> {"msg_id":3,"cmd":"loop_param_query","ts":1719000004}
|
||
<<< {"msg_id":3,"cmd":"loop_param_query","ts":1719000005,"code":0,"msg":"success","data":{...}}
|
||
|
||
>>> {"msg_id":4,"cmd":"report_config","ts":1719000006,"data":{"sensor_type":12,"enable":true,"interval":5}}
|
||
<<< {"msg_id":4,"cmd":"report_config","ts":1719000007,"code":0,"msg":"success"}
|
||
|
||
... (5 秒后设备主动推送) ...
|
||
|
||
<<< {"msg_id":100,"cmd":"loop_data","ts":1719000012,"data":{...}}
|
||
<<< {"msg_id":101,"cmd":"loop_data","ts":1719000017,"data":{...}}
|
||
<<< {"msg_id":102,"cmd":"event_report","ts":1719000020,"data":{"events":[{"type":"car_enter","ch":1,"value":0}]}}
|
||
>>> {"msg_id":102,"cmd":"event_report","ts":1719000021,"code":0,"msg":"success"}
|
||
```
|
||
|
||
---
|
||
|
||
# 7 帧解析说明
|
||
|
||
- 每个 JSON 对象为一行，以 `\n` (0x0A) 结尾
|
||
- 解析时按行读取，提取完整 JSON 后解析
|
||
- JSON 内部不含换行符（紧凑格式）
|
||
- 收到非 JSON 行则丢弃并返回错误
|
||
- 帧长超过 4096 字节则断开连接
|
||
|
||
---
|
||
|
||
# 修订记录
|
||
|
||
| 版本 | 修订时间 | 修订说明 | 修订人 |
|
||
|------|----------|----------|--------|
|
||
| V1.00 | 2026-06-22 | 初始版本，基于串口协议 V1.01 | wangfq |
|
||
| V1.01 | 2026-07-15 | `event_report` 增加**客户端必答**机制：应答格式（回显 `msg_id`）、设备 5s 超时重发（同 `msg_id`/`ts`，最多 3 次）、待发队列合并上报、客户端去重与先落库后应答要求（与 MQTT 协议 V1.04 对称） | wangfq |
|