MQTT Client Connection Status

EMQX Cloud
1

Hi,

Is there any way to check if any client connect/disconnect so on server side status update on MQTT?
If possible, please guide me the step to do it.

2

Hi, you should subscribe to:

$events/client_connected
$events/client_disconnected

for full list see here:

3

Hi Vito,

Thank you for reply.

I already tried this but no connection events receive.
Is there any other way to do this?

4

Try to create a rule (data integration), in order to move packets to a different recipient (sql server, kafka…). It will work.
Actually, It doesn’t work, if you try to subscribe with a client tool (e.g. MQTTX) to those topic.

5

I have backend server on NodeJS and I connected to EMQX over MQTT and subscribe to these topics.
Also I’m using MongoDB.

6

Actually, directly subscribing to those topics doesn’t work (at least for me). I should use a data integration rule (kafka one) in order to receive those packets

7

But I need realtime update to send frontend applications for update connection status of device.

8

Yes, we have the same requirement. Actually, adding one more step to the pipeline (Kafka for example) is not a big problem. Believe me, it’s matter of few milliseconds