decode #

This method must be implemented in order to decode the payload.

It has to return a promise resolving to a DeviceContent with the following information:

• reference: device identifier
• measures: measures received in the payload
• qos: additional information about device state like battery, etc. (optional)

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abstract decode (payload: JSONObject, request: KuzzleRequest): Promise<DeviceContent>

Arguments	Type	Description
payload	JSONObject	Raw payload received in the API action body
request	KuzzleRequest	API request of origin

Returns #

Returns a promise resolving to a DeviceContent.

Usage #

Considering the following payload:

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{
  deviceEUI: '12345',
  register55: 23.3,
  batteryLevel: 0.8,
}

The following decode method could be implemented:

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import { JSONObject, KuzzleRequest } from 'kuzzle';
import { Decoder, DeviceContent } from 'kuzzle-plugin-device-manager';

class KarakoyDecoder extends Decoder {
  // [...]
  async decode (payload: JSONObject, request: KuzzleRequest): Promise<DeviceContent> {
    const deviceContent: DeviceContent = {
      reference: payload.deviceEUI,
      measures: {
        temperature: {
          updatedAt: Date.now(),
          value: payload.register55,
        }
      },
      qos: {
        battery: payload.batteryLevel * 100
      }
    };

    return deviceContent;
  }
}