Scaleway Elements IoT Hub Metrics

IoT Hub Metrics - Overview

Metrics reports the usage of your Hub and Devices.

Available metrics:

1 . Messages count : how many messages a Hub / Device sent / received 2 . Device activity : when a Device was seen connected 3 . Active devices : how many Hub Devices were connected

Available metrics

Messages count

  • Messages count as a Device metric is the number of messages exchanged between the Hub and the Device during the period,
  • Messages count as a Hub metric is the sum of all messages exchanged during the period.

Any kind of MQTT packet (CONNECT, PUBLISH, SUBSCRIBE, PING, …) in any direction (sent or received) is counted as 1 message.


Device1 connects & publish a message with qos1

	Device1    CONNECT ->    Hub
	        <- CONNACK
	           PUBLISH ->
	        <- PUBACK

This counts as 4 messages for Device1.
This message is distributed to Device2 and Device3 (with Qos1)

	Hub    PUBLISH -> Device2
	    <- PUBACK
	       PUBLISH -> Device3
	    <- PUBACK

This counts as 4 messages.
So in total 8 messages transited through the Hub.

Please note that this metric is different from the number of billed message each month, which also depends on message size.

Device Activity and Active Devices

The device activity metric shows when a particular device was connected to a hub. The active devices metric aggregates all the device activity metrics of that hub’s devices to show how many devices were connected at the same time.

  • Device activity : this Device metric shows when a Device was connected to your Hub. A device is shown as active during a time interval (which are represented by bars on the graph), if it was at least connected during a part of it. This means that the device doesn’t have to be connected during the whole time interval to be shown as active.
  • Active devices : this Hub metric is the number of distinct Devices seen connected to your Hub during the period. Again, for each time interval, a device doesn’t need to stay connected during the whole interval to be counted as active.

A device is flagged as connected as soon as the Hub receives a valid CONNECT packet and accepts it. It is flagged disconnected after its connection has been closed.

On the Scaleway console, the Device active state is represented with a green positive bar, while an inactive state will be represented by a red negative bar.


Device1 connects at 9:10am, disconnects at 9:11am.
- In **Last 60 min** period, it will be counted as active for *9:10am* and *9:11am* bars.
- In **Last 24 hours** period, it will be counted as active for *9:00am* bar.

Device2 connects at 9:11am, disconnects at 10:31am.
- In **Last 60 min** period, it will be counted as active for *9:11am* to *10:31am* bars.
- In **Last 24 hours** period, it will be counted as active for *9:00am* and *10:00am* bars.

Time scales

For each metric you can choose among 5 time scales:

1 . Last 60 min: values from 1 hour ago to the last minute, aggregated per minute, 2 . Last 24 hours: values from 24 hours ago to last hour, aggregated per hour, 3 . Last 7 days: values from 7 days ago to last day quarter, aggregated per 6 hours, 4 . Last 30 days: values from 30 days ago to yesterday, aggregated per day, 5 . Last 365 days: values from 365 days ago to last 30 days, aggregated per calendar month (the real number of days of each month is used for this time period)

Hub Metrics

To view hub metrics, click on Metrics tab of your Hub.

IoT Hub Metrics

The metrics of the Hub are visualized as graph:

IoT Hub Metrics

Device Metrics

To display metrics, go to the Devices tab of your Hub:

IoT Hub Metrics

  • Clicking on the device name will open the Device Information view, which includes a Device metrics section.

IoT Hub Metrics

  • Clicking anywhere else on the device line will display a quick metrics overview (Note: the overview is limited to the last 24-hour period).

Learn more about Scaleway IoT Hub, discover how to add Devices to the hub, add IoT Hub routes or get started in a few clicks with the IoT Hub Kickstarts.

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