samples: nrf9160: modem_shell: LED #1 to indicate LTE reg status

LED #1 is now on indicating if LTE is registered.
Jira: MOSH-154

Signed-off-by: Jani Hirsimäki <[email protected]>

Author: jhirsi

doc/nrf/releases/release-notes-changelog.rst

@@ -130,6 +130,7 @@ nRF9160 samples
 
   * Added a new shell command ``cloud`` for establishing an MQTT connection to nRF Cloud.
   * Removed support for the GPS driver.
+  * The LED 1 on the development kit indicates the LTE registration status.
 
 * :ref:`http_application_update_sample` sample:
 

samples/nrf9160/modem_shell/README.rst

@@ -621,6 +621,14 @@ Button 1:
 Button 2:
    Enables or disables the UARTs for power consumption measurements. Toggles between UARTs enabled and disabled.
 
+LED indications
+===============
+
+The LEDs have the following functions:
+
+LED 1:
+   Indicates the LTE registration status.
+
 Testing
 =======
 

samples/nrf9160/modem_shell/prj.conf

@@ -141,6 +141,7 @@ CONFIG_MULTICELL_LOCATION_SERVICE_NRF_CLOUD=y
 
 # Library for buttons and LEDs
 CONFIG_DK_LIBRARY=y
+CONFIG_DK_LIBRARY_INVERT_LEDS=n
 
 # FOTA
 CONFIG_FLASH=y

samples/nrf9160/modem_shell/src/link/link.c

@@ -17,6 +17,8 @@
 #include <modem/lte_lc.h>
 #include <modem/pdn.h>
 
+#include <dk_buttons_and_leds.h>
+
 #include <nrf_socket.h>
 
 #include "link_settings.h"
@@ -47,6 +49,8 @@ struct pdn_activation_status_info {
 	uint8_t cid;
 };
 
+#define REGISTERED_STATUS_LED          DK_LED1
+
 /* Work for getting the modem info that ain't in lte connection ind: */
 static struct k_work registered_work;
 
@@ -147,6 +151,8 @@ static void link_registered_work(struct k_work *unused)
 
 	ARG_UNUSED(unused);
 
+	dk_set_led_on(REGISTERED_STATUS_LED);
+
 	memset(pdn_act_status_arr, 0,
 	       CONFIG_PDN_CONTEXTS_MAX * sizeof(struct pdn_activation_status_info));
 
@@ -333,6 +339,8 @@ void link_ind_handler(const struct lte_lc_evt *const evt)
 		    evt->nw_reg_status == LTE_LC_NW_REG_REGISTERED_HOME ||
 		    evt->nw_reg_status == LTE_LC_NW_REG_REGISTERED_ROAMING) {
 			k_work_submit(&registered_work);
+		} else {
+			dk_set_led_off(REGISTERED_STATUS_LED);
 		}
 		break;
 	case LTE_LC_EVT_CELL_UPDATE:

samples/nrf9160/modem_shell/src/main.c

@@ -200,6 +200,11 @@ void main(void)
 #endif
 	k_poll_signal_init(&mosh_signal);
 
+	err = dk_leds_init();
+	if (err) {
+		printk("Cannot initialize LEDs (err: %d)", err);
+	}
+
 	/* Resize terminal width and height of the shell to have proper command editing. */
 	shell_execute_cmd(shell, "resize");
 	/* Run empty command because otherwise "resize" would be set to the command line. */