samples: bluetooth: peripheral_hids: Add settings module

This commit adds settings module to the peripheral_hids that makes
bonding persistent.
Now it is possible to connect with previously bonded device.

Fixes #9580

Signed-off-by: Radoslaw Koppel <radoslaw.koppel@nordicsemi.no>

Author: rakons

samples/bluetooth/peripheral_hids/prj.conf

@@ -1,6 +1,17 @@
+# Incresed stack due to settings API usage
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048
+
 CONFIG_BT=y
 CONFIG_BT_DEBUG_LOG=y
 CONFIG_BT_SMP=y
 CONFIG_BT_PERIPHERAL=y
 CONFIG_BT_DEVICE_NAME="Test HoG mouse"
 CONFIG_BT_DEVICE_APPEARANCE=962
+
+CONFIG_BT_SETTINGS=y
+CONFIG_FLASH=y
+CONFIG_FLASH_PAGE_LAYOUT=y
+CONFIG_FLASH_MAP=y
+CONFIG_FCB=y
+CONFIG_SETTINGS=y
+CONFIG_SETTINGS_FCB=y

samples/bluetooth/peripheral_hids/src/main.c

@@ -14,6 +14,8 @@
 #include <misc/byteorder.h>
 #include <zephyr.h>
 
+#include <settings/settings.h>
+
 #include <bluetooth/bluetooth.h>
 #include <bluetooth/hci.h>
 #include <bluetooth/conn.h>
@@ -86,6 +88,10 @@ static void bt_ready(int err)
 	dis_init(CONFIG_SOC, "Manufacturer");
 	hog_init();
 
+	if (IS_ENABLED(CONFIG_SETTINGS)) {
+		settings_load();
+	}
+
 	err = bt_le_adv_start(BT_LE_ADV_CONN_NAME, ad, ARRAY_SIZE(ad), NULL, 0);
 	if (err) {
 		printk("Advertising failed to start (err %d)\n", err);