Choose the messaging pattern from device behavior, command flow, API ownership and maintenance needs.
MQTT fits persistent device telemetry, state updates and command flows. HTTP fits request-response APIs, configuration, web services and integrations where a device or server asks for a specific resource.
The protocol choice should follow the device workflow and the team that will operate the service.
| Decision factor | MQTT | HTTP |
|---|---|---|
| Communication pattern | Publish and subscribe to topics for device state, telemetry, commands and events. | Request and response for APIs, configuration, downloads, uploads and service integration. |
| Best-fit device job | Devices that stay connected, report state, receive commands or need efficient event flow. | Devices or services that make occasional calls, fetch resources or integrate with web systems. |
| Cloud design impact | Needs topic structure, device identity, session behavior, permissions and message handling. | Needs endpoints, authentication, retry behavior, payload contracts and API ownership. |
| Buyer risk | Risk sits in topic design, broker operation, command permissions and lifecycle monitoring. | Risk sits in API stability, authentication, retry logic, rate limits and integration ownership. |
Protocol selection affects device identity, permissions, logs, maintenance and integrations.
MQTT is often better for device telemetry, state updates and command flows. HTTP is often better for request-response APIs, configuration, uploads, downloads and integrations. The right choice depends on device behavior and cloud ownership.
Yes. A product can use MQTT for device messaging and HTTP for account, dashboard, configuration, file or integration services. The interfaces should be defined together so support teams understand the full operating model.
Define device identity, data fields, command flow, sleep behavior, authentication, retry rules, logs, ownership and maintenance responsibility before fixing the messaging protocol.