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Jul 31, 2025
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fix(iot): add mqtt version limitation #5357

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fix(iot): add mqtt version limitation
RoRoJ Jul 30, 2025
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Update pages/iot-hub/faq.mdx
RoRoJ Jul 31, 2025
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RoRoJ Jul 31, 2025
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2 changes: 2 additions & 0 deletions pages/iot-hub/concepts.mdx
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Expand Up @@ -66,6 +66,8 @@ Message filters restrict the messages a device can publish or subscribe to. Each

Message Queuing Telemetry Transport (MQTT) is a lightweight publish/subscribe protocol for exchanging messages between devices and/or applications. Find out more about MQTT [on our blog](https://www.scaleway.com/en/blog/introduction-to-mqtt-protocol/).

Scaleway IoT Hub supports MQTT v3.1, but not MQTT v5.

## Mutual TLS (mTLS)

Mutual TLS is a method of mutual authentication. It indicates that both the TLS client and TLS server are required to authenticate each other. Each party must therefore possess a certificate to provide to the other, as well as a Certificate Authority to verify the certificate provided by the other party.
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8 changes: 6 additions & 2 deletions pages/iot-hub/faq.mdx
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Expand Up @@ -12,7 +12,7 @@ IoT Hub is an IoT Platform as a service, it sits between connected devices and b
Connected devices is the common name for all devices able to communicate over the internet (via Wi-Fi or 4G, for instance). Connected devices are everywhere and can be used in a very broad range of applications. They can be smartphones, doorbells, light bulbs, refrigerators, cars, or TVs. Even a web browser can act as a connected device.

[MQTT](https://mqtt.org/) is a lightweight and standardized publish/subscribe messaging transport protocol, designed for low-power usage, minimized data packets, and efficient distribution of information to one or many receivers. MQTT supports secure communication using TLS, and it is often used in IoT use cases.
All kinds of connected devices supporting the MQTT protocol can be connected to IoT Hub. MQTT through WebSockets is also supported. There is no limitation to specific vendors.
All kinds of connected devices supporting the MQTT protocol can be connected to IoT Hub. MQTT through WebSockets is also supported. There is no limitation to specific vendors/
To learn more about **Hubs**, **Devices*,* and **Routes**, head over to our dedicated pages:

* [Scaleway IoT Hub Overview](/iot-hub/quickstart/)
Expand Down Expand Up @@ -85,4 +85,8 @@ On a dedicated or High-Availability Hub, you are the only customer on the messag
Any MQTT message between the Hub and a Device will be billed. If the message is bigger than 4 kB, then each 4 kB chunk of the message will be counted as a message for billing purposes. For example, a 9 kB message will be billed as 3 messages.

## What is the maximum message size?
The maximum size for a message is 4 MB.
The maximum size for a message is 4 MB.

## Which versions of MQTT are supported by Scaleway IoT Hub?

Scaleway IoT Hub supports MQTT v3.1, but not MQTT v5.