[lighting-app] Put application-specific config file to override the default configuration values

examples/lighting-app/esp32/main/Kconfig.projbuild

@@ -60,6 +60,10 @@ menu "Demo"
             depends on IDF_TARGET_ESP32C6
     endchoice
 
+    config CHIP_PROJECT_CONFIG
+        string "CHIP Project Configuration file"
+        default "main/include/CHIPProjectConfig.h"
+
     choice LED_TYPE
         prompt "LED type"
         default LED_TYPE_RMT if DEVICE_TYPE_ESP32_C3_DEVKITM || DEVICE_TYPE_ESP32_S3_DEVKITM || DEVICE_TYPE_ESP32H2_DEVKITC || DEVICE_TYPE_ESP32_C6_DEVKITC

examples/lighting-app/esp32/main/include/CHIPProjectConfig.h

@@ -0,0 +1,49 @@
+/*
+ *
+ *    Copyright (c) 2023 Project CHIP Authors
+ *    All rights reserved.
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *        http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+
+/**
+ *    @file
+ *          Example project configuration file for CHIP.
+ *
+ *          This is a place to put application or project-specific overrides
+ *          to the default configuration values for general CHIP features.
+ *
+ */
+
+#pragma once
+
+/**
+ *  @def CHIP_CONFIG_MAX_FABRICS
+ *
+ *  @brief
+ *    Maximum number of fabrics the device can participate in.  Each fabric can
+ *    provision the device with its unique operational credentials and manage
+ *    its own access control lists.
+ */
+#define CHIP_CONFIG_MAX_FABRICS 5 // 5 is the minimum number of supported fabrics
+
+/**
+ * @def CHIP_IM_MAX_NUM_SUBSCRIPTIONS
+ *
+ * @brief Defines the maximum number of ReadHandler for subscriptions, limits the number of active subscription transactions on
+ * server.
+ *
+ * The default value comes from 3sub per fabric * max number of fabrics.
+ *
+ */
+#define CHIP_IM_MAX_NUM_SUBSCRIPTIONS 45

src/platform/ESP32/CHIPPlatformConfig.h

@@ -53,9 +53,12 @@
 
 #define CHIP_CONFIG_MAX_UNSOLICITED_MESSAGE_HANDLERS CONFIG_MAX_UNSOLICITED_MESSAGE_HANDLERS
 #define CHIP_CONFIG_MAX_EXCHANGE_CONTEXTS CONFIG_MAX_EXCHANGE_CONTEXTS
-#define CHIP_CONFIG_MAX_FABRICS CONFIG_MAX_FABRICS
 #define CHIP_CONFIG_SECURITY_TEST_MODE CONFIG_SECURITY_TEST_MODE
 
+#ifndef CHIP_CONFIG_MAX_FABRICS
+#define CHIP_CONFIG_MAX_FABRICS CONFIG_MAX_FABRICS
+#endif
+
 #ifdef CONFIG_ENABLE_WIFI_STATION
 #define CHIP_DEVICE_CONFIG_ENABLE_WIFI_STATION 1
 #else