Config clientID in MQTT broker

[chongz]

Hi,

Is there a place to configure the clientID in the MQTT since my broker only support V3?

It's the -i option in mosquitto_pub CLI https://mosquitto.org/man/mosquitto_pub-1.html :

-i,
--id

The id to use for this client. If not given, a client id will be generated depending on the MQTT version being used. For v3.1.1/v3.1, the client generates a client id in the format mosq-XXXXXXXXXXXXXXXXXX, where the X are replaced with random alphanumeric characters. For v5.0, the client sends a zero length client id, and the server will generate a client id for the client.

Thanks,

cz

[a5it]

Hello Chongz,

Yes, you can configure the clientID in MQTT when using a client library, as most libraries support setting a custom clientID. Here's how you can do it with some popular MQTT libraries:

1. Eclipse Paho (Python):

python
import paho.mqtt.client as mqtt

client = mqtt.Client(client_id="your_custom_clientID")

2. Eclipse Paho (Java):

java
import org.eclipse.paho.client.mqttv3.MqttClient;

MqttClient client = new MqttClient("tcp://broker.example.com:1883", "your_custom_clientID");

3. Mosquitto (C):

c
#include <mosquitto.h>

struct mosquitto *mosq = mosquitto_new("your_custom_clientID", true, NULL);

In each of these examples, replace "your_custom_clientID" with the desired clientID for your MQTT client. This will then set the provided clientID for the MQTT connection.Keep in mind that when using the mosquitto_pub CLI command, you can set the clientID using the -i option as you've mentioned:

mosquitto_pub -h broker.example.com -t "your/topic" -m "message" -i "your_custom_clientID"

Again, replace "your_custom_clientID" with the desired clientID.This response is powered by A5 IT AI.

Credit: a5it.com

[chongz]

Thanks.

Sorry I wasn't clear. I was asking if client id can be configured in the Meraki dashboard under "IoT Radio Settings" -> "MQTT broker" > "MQTT telemetry streaming"

[alemabrahao]

As far as I know, it's not possible to configure. Maybe you should open a support case.

[chongz]

ok thank!