Receiving a TypeError for UDP scan data

Question

Using the Local Home SDK developer preview for Google Assistant, I'm receiving a TypeError from my application during IDENTIFY that was previously working correctly. The error is claiming that UdpScanData is not a valid string when I try to decode the payload.

Example code:

const device = identifyRequest.inputs[0].payload.device;
const response = Buffer.from(device.udpScanData, "hex");

How do I access the UDP discovery payload?

Answer 1

In the 0.2.0 update to the developer preview SDK, we have migrated the UdpScanData parameter to be an interface instead of just a type alias for string (see the updated reference docs) to improve consistency with the other scan data types.

To access the response payload for a UDP scan in the latest SDK, update your package.json dependencies to use v0.2.0:

{
  ...
  "dependencies": {
    "@google/local-home-sdk": "^0.2.0"
  }
}

Then, access the payload using the new data property:

const device = identifyRequest.inputs[0].payload.device;
const scanData = device.udpScanData;
const response = Buffer.from(scanData.data, "hex");