如何使用Hono批量发送遥测数据？JSON格式问题求助

你当前的批量JSON格式存在两个核心问题：

• data字段下直接并列多个JSON对象，违反JSON语法规范（对象的属性值只能是单个值、数组或嵌套对象）
• 未遵循Eclipse Ditto的批量命令或批量修改规范

方案1：使用Ditto批量命令格式 #

Ditto支持通过单个HTTP请求发送多条独立命令，只需将所有单条命令包裹在一个JSON数组中即可：

[
  {"topic": "org.tip/dev1/things/twin/commands/modify","headers": {},"path": "/features/sensor1/properties/value","value": 1},
  {"topic": "org.tip/dev1/things/twin/commands/modify","headers": {},"path": "/features/sensor2/properties/value","value": 23},
  {"topic": "org.tip/dev1/things/twin/commands/modify","headers": {},"path": "/features/sensor3/properties/value","value": 32},
  {"topic": "org.tip/dev1/things/twin/commands/modify","headers": {},"path": "/features/sensor4/properties/value","value": 4},
  {"topic": "org.tip/dev1/things/twin/commands/modify","headers": {},"path": "/features/sensor5/properties/value","value": 13},
  {"topic": "org.tip/dev1/things/twin/commands/modify","headers": {},"path": "/features/sensor6/properties/value","value": 17}
]

发送时需确保HTTP请求的Content-Type设置为application/json，请求路径与单条命令一致。

方案2：单条命令批量更新多个传感器值 #

更高效的方式是利用Ditto的JSON合并特性，在一条modify命令中一次性更新所有传感器值：

{
  "topic": "org.tip/dev1/things/twin/commands/modify",
  "headers": {},
  "path": "/features",
  "value": {
    "sensor1": {"properties": {"value": 1}},
    "sensor2": {"properties": {"value": 23}},
    "sensor3": {"properties": {"value": 32}},
    "sensor4": {"properties": {"value": 4}},
    "sensor5": {"properties": {"value": 13}},
    "sensor6": {"properties": {"value": 17}}
  }
}

这里将path设为/features，value字段包含所有传感器的属性结构，Ditto会自动将这些修改合并到现有孪生数据中。若只需更新value字段，也可将path设为/features，仅在value中指定每个传感器的properties.value子结构。

注意：HTTP 202状态码仅表示Hono适配器已接收请求，不代表Ditto成功处理。可通过Ditto的孪生数据查询API验证修改结果，或查看Ditto日志排查格式问题。

内容的提问来源于stack exchange，提问作者Johnz