samples: cellular: nrf_cloud_multi_service: reduce prov rate

Once device has connected to the cloud, slow down the
provisioning check.

Improve logging of shadow and FOTA polling intervals
for CoAP.

Make CoAP shadow and FOTA check intervals the same as
the sensor update interval.

Improve handling of credentials check to check for new error
code for bad CA size, and also turn off network if credentials
are bad and the nrf_provisioning service is not used.

Jira: IRIS-9151

Signed-off-by: Pete Skeggs <[email protected]>

Author: plskeggs

samples/cellular/nrf_cloud_multi_service/Kconfig

@@ -245,6 +245,13 @@ config SEND_ONLINE_ALERT
 	  Enable this to demonstrate the alert feature of nRF Cloud. Reception of this alert
 	  indicates the device has rebooted.
 
+config POST_PROVISIONING_INTERVAL_M
+	int "Delay in minutes between provisioning checks once connected"
+	default 30
+	help
+	  Use a slower rate to check for provisioning after we have successfully connected.
+	  Until then use CONFIG_NRF_PROVISIONING_INTERVAL_S.
+
 if NRF_CLOUD_COAP
 
 menuconfig COAP_FOTA

samples/cellular/nrf_cloud_multi_service/overlay_coap.conf

@@ -13,7 +13,8 @@ CONFIG_NEWLIB_LIBC_NANO=n
 # This is strictly for demo purposes.
 CONFIG_SENSOR_SAMPLE_INTERVAL_SECONDS=120
 CONFIG_LOCATION_TRACKING_SAMPLE_INTERVAL_SECONDS=360
-CONFIG_COAP_FOTA_JOB_CHECK_RATE_MINUTES=5
+CONFIG_COAP_FOTA_JOB_CHECK_RATE_MINUTES=2
+CONFIG_COAP_SHADOW_CHECK_RATE_SECONDS=120
 
 # Logs
 CONFIG_LOG=y

samples/cellular/nrf_cloud_multi_service/src/cloud_connection.c

@@ -16,6 +16,7 @@
 #include <net/nrf_cloud_coap.h>
 #include "fota_support_coap.h"
 #endif
+#include <net/nrf_provisioning.h>
 
 #include "cloud_connection.h"
 #include "provisioning_support.h"
@@ -143,6 +144,12 @@ static void cloud_ready(void)
 	/* Notify that the nRF Cloud connection is ready for use. */
 	k_event_post(&cloud_events, CLOUD_READY);
 	LOG_DBG("Setting CLOUD_READY");
+
+	if (IS_ENABLED(CONFIG_NRF_PROVISIONING)) {
+		LOG_INF("Reducing provisioning check interval to %d minutes",
+			CONFIG_POST_PROVISIONING_INTERVAL_M);
+		nrf_provisioning_set_interval(CONFIG_POST_PROVISIONING_INTERVAL_M * SEC_PER_MIN);
+	}
 }
 
 /* A callback that the application may register in order to handle custom device messages.
@@ -614,10 +621,22 @@ static void check_credentials(void)
 			LOG_WRN("nRF Cloud credentials are not installed. "
 				"Please install and reboot.");
 		}
-		k_sleep(K_FOREVER);
-	} else if (status) {
-		LOG_ERR("Error while checking for credentials: %d. Proceeding anyway.", status);
+	} else if (status == -ENOPROTOOPT) {
+		LOG_WRN("Required root CA certificate is missing.");
+	} else {
+		if (status) {
+			LOG_ERR("Error while checking for credentials: %d. Proceeding anyway.",
+				status);
+		}
+		return;
+	}
+	if (!IS_ENABLED(CONFIG_NRF_PROVISIONING)) {
+		/* Save power since credentials will not work, and we are not using the
+		 * cloud-based nrf_provisioning service.
+		 */
+		conn_mgr_all_if_down(true);
 	}
+	k_sleep(K_FOREVER);
 }
 
 void cloud_connection_thread_fn(void)

samples/cellular/nrf_cloud_multi_service/src/fota_support_coap.c

@@ -81,8 +81,8 @@ int coap_fota_thread_fn(void)
 		 */
 		err = nrf_cloud_fota_poll_process(&ctx);
 		if (err == -EAGAIN) {
-			LOG_DBG("Retrying in %d minute(s)",
-				CONFIG_COAP_FOTA_JOB_CHECK_RATE_MINUTES);
+			LOG_INF("Checking for FOTA job in %d seconds",
+				CONFIG_COAP_FOTA_JOB_CHECK_RATE_MINUTES * SEC_PER_MIN);
 			k_sleep(K_MINUTES(CONFIG_COAP_FOTA_JOB_CHECK_RATE_MINUTES));
 			continue;
 		}