Wi-Fi Auto Reconnect

RE: Wi-Fi Auto Reconnect

Saxman58 — Fri, 02 May 2025 16:44:15 GMT

Hi Elfving,

You are right, the automatic reconnect works even if I remove the code to reconnect from the disconnect event handler.

I saw the automatic connect feature but assumed it didn't apply to our code for two reasons. First, we are not using the Wi-Fi Credentials library and connect using an SSID and password that we manage separately. And second, the documentation talks about automatic connection which I interpreted as just the initial connection, not reconnection after a loss of connection.

I guess that explains why I couldn't find any real discussion about this. It just works, without any extra code, and even if you connect more directly without the credentials library.

Thanks,

Glen

RE: Wi-Fi Auto Reconnect

Elfving — Tue, 29 Apr 2025 14:01:13 GMT

Hi Glen,

There should be support for automatic connections, you can for instance see here. Though adding this yourself using the disconnect event also works. Glad to hear that you are also using a workqueue for this.

Did you see any issues with reconnection before adding this though? Or when using any default samples. I agree that I can't seem to find anything public regarding best-practices for this.

Regards,

Elfving

RE: Wi-Fi Auto Reconnect

Saxman58 — Tue, 29 Apr 2025 06:40:24 GMT

I ended up just calling wifi_connect() from the disconnect event handler to try to reconnect after any unintentional disconnects. I tested it by turning the Wi-Fi Access Point (hub) off for a while, and it seems to work well. To move the wifi_connect() call out of the interrupt context, it is run from the work queue:

static void process_reconnect(struct k_work *work) {
    wifi_connect();
}
K_WORK_DEFINE(reconnect_work, process_reconnect);

This is added to the work queue from the interrupt disconnect event handler:

static void handle_wifi_disconnect_result(struct net_mgmt_event_callback *cb)
{
	const struct wifi_status *status =
		(const struct wifi_status *) cb->info;

	if (context.disconnect_requested) {
		LOG_INF("Disconnection request %s (%d)",
			 status->status ? "failed" : "done",
					status->status);
		context.disconnect_requested = false;
	} else {
		LOG_INF("Disconnected");
		context.connected = false;
		wifi_active_off();
        // Since disconnect was not requested, try to reconnect
        k_work_submit(&reconnect_work);
	}

	cmd_wifi_status();
}