Metadata

Set metadata value

Publish topic meta/NAME, payload: value in plain text (i.e. 123, hello or 3.1415926)

• NAME - the metadata name

The device can set the value of such field types:

• System fields

  • Hotspot Name

  • Time Zone - no validation of input!

• Custom fields

  • Text

  • Number

  • Table

  • IMEI

  • ICCID

mosquitto_pub -h blynk.cloud -p 8883 -u device -P '{DEVICE_TOKEN}' -t 'meta/Serial Number' -m '12345'

Subscribe to metadata updates

Subscribe to topic: downlink/meta/NAME (or to a wildcard topic like downlink/meta/#)

• NAME - the metadata name

mosquitto_sub -h blynk.cloud -p 8883 -u device -P '{DEVICE_TOKEN}' -t 'downlink/meta/Device Name'

Request metadata value from Blynk

Subscribe to topic: downlink/meta/NAME (or to a widcard topic like downlink/meta/#)

• NAME - the metadata name

Publish topic get/meta, payload: metadata names separated by comma (i.e. Ceiling Height,Room Volume)

mosquitto_pub -h blynk.cloud -p 8883 -u device -P '{DEVICE_TOKEN}' -t 'get/meta' -m 'Serial Number,Time Zone'

Supported Metadata types

The device can request the value of such field types:

• System fields

  • Device Name

  • Device Owner (owner's email)

  • Hotspot Name

  • Location

  • Time Zone

• Custom fields

  • Text

  • Number

  • Contact

  • Switch

  • Device Reference - works but not insightful (returns Device ID)

  • List

  • Table

  • IMEI

  • ICCID

  • Email

  • Image

  • Device EUI

  • Join EUI

  • Application Key

  • Blues Device

  • Myriota Terminal ID

  • TheThingsNetwork Device ID

  • Thing Name