Platform Delivering a Message

Function

This API is used by an application to deliver a message in custom format to a device when the application cannot deliver data in the format defined in the product model.

For differences between command delivery and message delivery, see Message Communications Overview.

It is not suitable to report data in JSON format for devices with low configuration and limited resources or with limits on bandwidth usage. In this case, devices can transparently transmit the original binary data to the platform, but a codec is required to convert binary data to JSON format. For details about how to develop codecs, see Developing a Codec.

Topic

Downstream: $oc/devices/{device_id}/sys/messages/down

Parameters

Example

Topic: $oc/devices/{device_id}/sys/messages/down  
Data format:
{
    "object_device_id": "{object_device_id}",
    "name": "name",
    "id": "id",
    "content": "hello"
}