Metrics reports the usage of your Hub and Devices.
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
Any kind of MQTT packet (
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.
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.
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.
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)
To view hub metrics, click on Metrics tab of your Hub.
The metrics of the Hub are visualized as graph:
To display metrics, go to the Devices tab of your Hub: