AWS MQTT IP connect with domain fallback

RE: AWS MQTT IP connect with domain fallback

user93921 — Mon, 23 May 2022 13:40:41 GMT

Hi Daniel,

Yes, it is not easy for was it lib, because it assumes you only connect with one aws iot sever.

Also it is less chance that the AWS IoT server will have a connection issue. If you do need one solution for a backup server, you may need to modify and maintain a custom aws_iot library. You can refer to the open-source nrf\subsys\net\lib\aws_iot\src\aws_iot.c as reference.

Best regards,

Charlie

RE: AWS MQTT IP connect with domain fallback

user86703 — Fri, 20 May 2022 17:52:00 GMT

is there also something like this for aws iot lib? because I think the client can not be set there

RE: AWS MQTT IP connect with domain fallback

user93921 — Fri, 20 May 2022 09:11:27 GMT

Hi Daniel,

We do not have an example specifically for this feature, but I do not think it is hard to implement such application-level codes.

You can modify the following codes from github.com/.../main.c add alternative MQTT server options:

do_connect:
	if (connect_attempt++ > 0) {
		LOG_INF("Reconnecting in %d seconds...",
			CONFIG_MQTT_RECONNECT_DELAY_S);
		k_sleep(K_SECONDS(CONFIG_MQTT_RECONNECT_DELAY_S));
	}
	err = mqtt_connect(&client);
	if (err != 0) {
		LOG_ERR("mqtt_connect %d", err);
		goto do_connect;
	}

Best regards,

Charlie