Comments on: Run Your Cloud MQTT Mosquitto Broker (access from anywhere using Digital Ocean)

By: RAMZI

RAMZI — Fri, 13 Jun 2025 20:37:18 +0000

Hi,
I think I started by starting. I followed the tutorial:
https://randomnerdtutorials.com/cloud-mqtt-mosquitto-broker-access-anywhere-digital-ocean/
Please send me a tutorial to help me.
Best regards.

By: Sara Santos

Sara Santos — Mon, 24 Feb 2025 02:28:54 +0000

In reply to Ramzi.

Hi.
I recommend starting the installation process from the start.
Regards,
Sara

By: Ramzi

Ramzi — Fri, 21 Feb 2025 13:17:16 +0000

Hello,
I can not restart Mosquitto :
when i try : sudo systemctl restart mosquitto
I get :
Job for mosquitto.service failed because the control process exited with error code.
See “systemctl status mosquitto.service” and “journalctl -xeu mosquitto.service” for details.

By: Jon

Jon — Sun, 11 Feb 2024 23:19:51 +0000

As always, a great tutorial. Thank you for creating it.

I was struggling with the same issue that Jim & Moyo were having to get the ESP32 to connect to mqtt broker. I came across this website https://test.mosquitto.org/ which listed port 1884 : MQTT, unencrypted, authenticated. So when I tried port 1884 instead of 1883, the ESP32 connection worked.

I’m having issues with the (Optional) Taking It Further – MQTT Mosquitto Broker Encrypted Requests. Mosquitto cannot access the files in the letsencript filepath. Other websites have referenced copying the certs over to the Mosquitto certs folder. I haven’t tried this. For now, I’m just not using SSL. Open to suggestions. I’m running a DigitialOcean Droplet with ubunto 23.10 and mosquitto 2.0.18.

By: Dom

Dom — Wed, 22 Nov 2023 14:19:59 +0000

If you expirience the problem that the server is not running after setting up the credentials you have to must grant some privileges to the password-file so do:
“chown mosquitto /etc/mosquitto/passwd”, otherwise it won´t work.
But I´m not sure if this setting is secure, tough…

Greetings Dom

By: Dom

Dom — Wed, 22 Nov 2023 14:18:29 +0000

Ok everyone,

I found the solution to my question.It seems that you must grant some privileges so do:
“chown mosquitto /etc/mosquitto/passwd”, otherwise it won´t work.
But I´m not sure if this setting is secure, tough…

Greetings Dom

By: Dominik

Dominik — Wed, 22 Nov 2023 14:00:29 +0000

Hi Sara,

I got the same message from the first post (connecting…disconnecting…) when using no authorization.

But as soon as I set a password and change the configuration file the whole mosquitto server refuses to run?

When commenting out the change in the configuration file it runs again????

So it must have something to do with the configuration file especially one of the last three lines.

Regards Dom

By: Sara Santos

Sara Santos — Wed, 27 Sep 2023 09:16:32 +0000

In reply to Andy.

Hi.
I’m not sure.
Double-check that you’re using the latest version of the library and with all the right settings.
Additionally, make sure you’ve set up the mosquitto broker properly.
I haven’t tried this with the other library, so I’m not sure if there is any “trick” to make it work.
Regards,
Sara

By: Andy

Andy — Tue, 26 Sep 2023 11:10:28 +0000

In reply to Sara Santos.

Hi Sara,

Thanks for the prompt reply. Yes it is what I thought originally but it seems the it only works with the AsyncMqttClient. With the other MQTT client is never able to connect, event with the correct settings it goes: Attempting MQTT connection…failed.
Any idea what might be causing the issue?

By: Sara Santos

Sara Santos — Tue, 26 Sep 2023 09:30:04 +0000

In reply to Andy.

Hi.
You can use other MQTT libraries compatible with the ESP32 without any problem.
Just make sure you insert the right configurations.
Regards,
Sara