How does my device connect over MQTT?

A direct MQTT device connects to our broker with the username and password issued once when you create it, and publishes JSON under its topic:

tenants/{tenantId}/devices/{deviceId}/data

Use a TLS connection where available. Keep your publish rate under your plan's limits or messages are dropped. Gateway-mediated devices don't need their own MQTT setup — the gateway handles the connection for them.

More in FAQ
Why is my device offline?
Online status is based on recent messages — here is how it works.
Why was my message dropped?
Dropped messages almost always mean a rate limit was hit.
Can I export my telemetry?
How retention works and how to get your data out.
Why isn't my telemetry being stored?
Realtime-only tiers and storage caps both stop persistence.
Can I change my plan anytime?
Yes — upgrades are instant; downgrades use a grace period.
How is my storage calculated?
Storage scales with devices, tags, and publish frequency.