Connecting to Private MQTT broker

RE: Connecting to Private MQTT broker

Øyvind — Thu, 23 Feb 2023 07:43:32 GMT

What happens on the broker side? Does this receive the published message?

RE: Connecting to Private MQTT broker

yeo — Thu, 23 Feb 2023 06:54:38 GMT

But if the mqtt broker receives the message it will show that messages are received. There are no messages received output in the terminal.

Best regards,

Yeo Rhi Khin

RE: Connecting to Private MQTT broker

Øyvind — Wed, 22 Feb 2023 08:08:54 GMT

The sample works

RE: Connecting to Private MQTT broker

Øyvind — Wed, 22 Feb 2023 07:54:32 GMT

Do you have any log output to share as well? Do you receive any errors? Difficult to tell what is failing.

RE: Connecting to Private MQTT broker

yeo — Wed, 22 Feb 2023 06:57:31 GMT

devzone.nordicsemi.com/.../MQTT_5F00_simple-_2800_3_2900_.zip

This is my modified code. However, it still doesn't send messages to the private MQTT broker. Can you please help me to have a look?

best regards,

Yeo Rhi Khin

RE: Connecting to Private MQTT broker

Øyvind — Mon, 20 Feb 2023 12:03:51 GMT

Hello,

Looking at the last project that you have attached, there is no username or password added to client_init().

Both are configured to NULL.

Have a look at the sample zephyr\samples\net\cloud\mqtt_azure. I.e. this shows how to configure the username and password. The sample uses KConfig to define the Kconfig symbols which you can add value to in prj.conf. In client_init() the following is added:

//add to top off client_init()
static struct mqtt_utf8 password;
static struct mqtt_utf8 username;


client->client_id.utf8 = (uint8_t *)MQTT_CLIENTID;
client->client_id.size = strlen(MQTT_CLIENTID);

password.utf8 = (uint8_t *)CONFIG_SAMPLE_CLOUD_AZURE_PASSWORD;
password.size = strlen(CONFIG_SAMPLE_CLOUD_AZURE_PASSWORD);

client->password = &password;

username.utf8 = (uint8_t *)CONFIG_SAMPLE_CLOUD_AZURE_USERNAME;
username.size = strlen(CONFIG_SAMPLE_CLOUD_AZURE_USERNAME);

client->user_name = &username;

This can be used as an example to get your project up and running.

RE: Connecting to Private MQTT broker

yeo — Sun, 19 Feb 2023 08:35:42 GMT

Hi, is there anyone to answer my question?

RE: Connecting to Private MQTT broker

yeo — Wed, 15 Feb 2023 16:02:07 GMT

devzone.nordicsemi.com/.../8816.mqtt_5F00_simple_5F00_sensor-_2800_2_2900_.zipHi, Please refer to this file instead

RE: Connecting to Private MQTT broker

yeo — Wed, 15 Feb 2023 15:58:06 GMT

Hi, sorry for the late reply. I have modified my code in client_init(), prj.conf, and Kconfig. However, I still couldn't send the data data to private MQTT broker. I have attached the code below. devzone.nordicsemi.com/.../8741.MQTT_5F00_simple.zip

RE: Connecting to Private MQTT broker

Øyvind — Mon, 13 Feb 2023 10:21:30 GMT

Hello,

You will need to know if the MQTT broker uses TLS for private connection. If so, you can build your project using nrf\samples\nrf9160\mqtt_simple\overlay-tls.conf.

If you are using the simple_mqtt sample, you can add the user_name and password in client_init(). From zephyr\include\zephyr\net\mqtt.h

	/** User name (if any) to be used for the connection. NULL indicates
	 *  no user name.
	 */
	struct mqtt_utf8 *user_name;

	/** Password (if any) to be used for the connection. Note that if
	 *  password is provided, user name shall also be provided. NULL
	 *  indicates no password.
	 */
	struct mqtt_utf8 *password;

More information can be found in the MQTT library documentation

Kind regards,
Øyvind.