nrf9160 MQTT Mqtt.c Last will and testamenet

RE: nrf9160 MQTT Mqtt.c Last will and testamenet

ovrebekk — Mon, 21 Nov 2022 10:21:20 GMT

Hi David

You can add this wherever you initialize the client.

As an example, in the mqtt_simple example you could add this code here, as a part of the client_init(..) function.

Best regards
Torbjørn

RE: nrf9160 MQTT Mqtt.c Last will and testamenet

David — Fri, 18 Nov 2022 16:08:47 GMT

Thank you Torbjørn,

Do you have any idea where I should Implement this?

In the client or the broker connection?

David

RE: nrf9160 MQTT Mqtt.c Last will and testamenet

ovrebekk — Fri, 18 Nov 2022 11:42:54 GMT

Hi David

There aren't any good examples for this unfortunately, but the implementation in the AWS driver shows you how to set it up:

#if defined(CONFIG_AWS_IOT_LAST_WILL)
    static struct mqtt_topic last_will_topic = {
        .topic.utf8 = CONFIG_AWS_IOT_LAST_WILL_TOPIC,
        .topic.size = sizeof(CONFIG_AWS_IOT_LAST_WILL_TOPIC) - 1,
        .qos = MQTT_QOS_0_AT_MOST_ONCE
    };
    static struct mqtt_utf8 last_will_message = {
        .utf8 = CONFIG_AWS_IOT_LAST_WILL_MESSAGE,
        .size = sizeof(CONFIG_AWS_IOT_LAST_WILL_MESSAGE) - 1
    };
    client->will_topic = &last_will_topic;
    client->will_message = &last_will_message;
#endif

You should be able to add the same code snippet to your own project.

Best regards
Torbjørn