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Jeff Slavin (Unlicensed)

Jeff Slavin (Unlicensed)

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Limitations

Registry IDs

  • Permitted characters: [a-zA-Z][-a-zA-Z0-9._+~%]+

  • First The first character must be a letter ([a-zA-Z])

  • Cannot start with "goog"

  • Minimum length: 3 characters

  • Maximum length: 255 characters

Device IDs

  • Must be unique within the parent device registry

  • Permitted characters: [a-zA-Z][-a-zA-Z0-9._+~%]+

  • First The first character must be a letter ([a-zA-Z])

  • Cannot start with "goog"

  • Minimum length: 3 characters

  • Maximum length: 255 characters

Device metadata keys

  • Permitted characters: [a-zA-Z][-a-zA-Z0-9._+~%]+

  • First The first character must be a letter ([a-zA-Z])

  • Minimum length: 1 character

  • Maximum length: 128 characters

  • Maximum combined total size of all device metadata key-value pairs: 256 KB

Device metadata values

  • Minimum size: 0 KB

  • Maximum size: 32 KB

  • Maximum combined total size of all device metadata key-value pairs: 256 KB

Subfolders*

  • Permitted characters: [a-zA-Z][-a-zA-Z0-9._+~%]+

  • First The first character must be a letter ([a-zA-Z])

  • Maximum size: 256 bytes

"Subfolders" refers to the eventNotificationConfigs.subfolderMatches field in the device registry , which field. It is used when matching MQTT or HTTP subfolders to a Cloud Pub/Sub topic. For more information, see See Creating a device registry with multiple Pub/Sub topics for more information.