[nxp][examples][k32w1][lock-app] Multiple ble connections changes

 * Add extra gatt headers to include demo gatt service
 * Add build changes
 * Update readme

Signed-off-by: Andrei Menzopol <andrei.menzopol@nxp.com>

Author: andrei-menzopol

examples/lock-app/nxp/k32w1/BUILD.gn

@@ -92,6 +92,15 @@ mcxw71_k32w1_sdk("sdk") {
       "${example_platform_dir}/board/peripherals.h",
     ]
   }
+
+  if (nxp_multiple_ble_connections)
+  {
+    include_dirs += [ "${example_platform_dir}/app_ble/include" ]
+    defines += [
+      "EXTRA_GATT_DB_HEADER=\"extra_gatt_db.h\"",
+      "EXTRA_GATT_UUID_HEADER=\"extra_gatt_uuid128.h\"",
+    ]
+  }
 }
 
 mcxw71_k32w1_executable("lock_app") {
@@ -140,6 +149,7 @@ mcxw71_k32w1_executable("lock_app") {
     "${common_example_dir}/low_power/include",
     "${common_example_dir}/operational_keystore/include",
     "${common_example_dir}/ui_feedback/include",
+    "${common_example_dir}/app_ble/include",
   ]
 
   sources += [
@@ -189,6 +199,15 @@ mcxw71_k32w1_executable("lock_app") {
     deps += [ "${chip_root}/src/platform/nxp:nxp_ota" ]
   }
 
+  if (nxp_multiple_ble_connections)
+  {
+    sources += [ "${example_platform_dir}/app_ble/source/BLEApplicationManager.cpp", ]
+  }
+  else
+  {
+    sources += [ "${common_example_dir}/app_ble/source/BLEApplicationManagerEmpty.cpp", ]
+  }
+
   if (chip_with_diag_logs_demo) {
     sources += [
       "${common_example_dir}/diagnostic_logs/source/DiagnosticLogsDemo.cpp",

examples/lock-app/nxp/k32w1/README.md

@@ -12,6 +12,7 @@ For generic information related to door lock application, please see the
         -   [Flashing the host image](#flashing-the-host-image)
     -   [Debugging](#debugging)
     -   [OTA](#ota)
+    -   [Multiple BLE connections](#multiple-ble-connections)
 
 ## Introduction
 
@@ -163,3 +164,12 @@ Run -> Debug Configurations... -> C/C++ Application
 
 Please see
 [k32w1 OTA guide](../../../../docs/guides/nxp/nxp_mcxw71_ota_guide.md).
+
+## Multiple BLE connections
+
+To compile with the Multiple BLE connections support demo example add the gn argument
+`nxp_multiple_ble_connections=true`.
+
+The application will accept multiple BLE connections after commissioning, by pressing the BLE advertise button again. Once discovered by a BLE central, a custom GATT service will be visible on the device.
+
+The user can change the default behavior by implementing the class defined in [BLEApplicationManager.h](../../../platform/nxp/common/app_ble/include/BLEApplicationManager.h)