Requirements
This page lists OmniCore requirements and related information.
Regions and versions
Transport Layer Security (TLS)
OmniCore requires TLS version 1.2 or higher.
MQTT bridge
MQTT version 3.1.1 is required. The following features are not supported:
MQTT QoS 2
Arbitrary MQTT topics and subscriptions. For topic requirements, see the section on connecting devices using MQTT
Last Will and Testament (LWT)
Retained messages
Persistent sessions
HTTP bridge
Secure communication (HTTPS) is required. OmniCore supports HTTP 1.1 only (not 2.0).
Permitted characters and size requirements
Registries and device identifiers, and their associated fields, are limited to certain characters. These fields are also limited in size (either length or byte size). The following table lists the permitted characters and sizes for each resource:
Registry IDs
Permitted characters: [a-zA-Z][-a-zA-Z0-9._+~%]+
First character must be a letter ([a-zA-Z])
Minimum length: 3 characters
Maximum length: 255 characters
Device metadata keys
Permitted characters: [a-zA-Z][-a-zA-Z0-9._+~%]+
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: 0KB
Maximum size: 128KB
Maximum combined total size of all device metadata key-value pairs: 256 KB
Subfolders*
Permitted characters: [a-zA-Z][-a-zA-Z0-9._+~%]+
First character must be a letter ([a-zA-Z])
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