CODEWITHSUNDEEP
google-cloud-platformgoogle-cloud-iot
Fredrik T
Fredrik T

Reputation: 21

How to get the device metadata info from google cloud iot core using listDevices

I would like to use listDevices to get all my devices under a registry. Google NodeJS Core IOT API spec

I get an array back which seems to contain a metadata obj/json doc but it's empty.

---
- credentials: []
  metadata: {}
  id: device001
  name: ''
  numId: '3038801391636994'
  config:
  lastConfigAckTime:
  state:
  lastConfigSendTime:
  blocked: false
  lastStateTime:
  logLevel: LOG_LEVEL_UNSPECIFIED
  gatewayConfig:
- credentials: []
  metadata: {}
  id: device002
  name: ''
  numId: '2991873732633082'
  config:
  lastConfigAckTime:
  state:
  lastConfigSendTime:
  blocked: false
  lastStateTime:
  logLevel: LOG_LEVEL_UNSPECIFIED
  gatewayConfig:

If I run a getDevice I do get the expected metadata but that requires a request for each device which becomes too slow and hammers resources. Bug or design?

const [response] = await iotClient.getDevice({name: devicePath});

Which actually shows the metadata

    Found device: device002 {
  credentials: [
    {
      expirationTime: [Object],
      publicKey: [Object],
      credential: 'publicKey'
    }
  ],
  metadata: {
    hasGPS: 'true',
    model: 'Pyton_v1',
    hasSolar: 'true',
    netType: 'WIFI'
  },
  id: 'device002'
}

Upvotes: 1

Views: 502

Answers (2)

aGuegu
aGuegu

Reputation: 2299

It is defined in the fieldMask parameter in listDevices api. Check the example code here:

https://cloud.google.com/iot/docs/how-tos/devices?authuser=1#getting_device_details

Upvotes: 0

Kim
Kim

Reputation: 336

I've made some tries with the device list functions and I think it is a design.

If you run the "gcloud iot devices list" command you get only the fields id and num_id, the ones that are filled in your output array too.

I tried using other client libraries and I got the same results, so it looks like it is designed like this but the NodeJS library retrieves additional fields for each device.

Upvotes: 2

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