diff --git a/ESP32-Rainmaker-Multidevice/multi_device/main/app_driver.c b/ESP32-Rainmaker-Multidevice/multi_device/main/app_driver.c
index 89c6ebe51..e8304732c 100644
--- a/ESP32-Rainmaker-Multidevice/multi_device/main/app_driver.c
+++ b/ESP32-Rainmaker-Multidevice/multi_device/main/app_driver.c
@@ -113,6 +113,7 @@ void app_driver_init()
         .mode = GPIO_MODE_OUTPUT,
         .pull_up_en = 1,
     };
+    // Bit mask to configure output GPIOs
     io_conf.pin_bit_mask = ((uint64_t)1 << OUTPUT_GPIO);
     /* Configure the GPIO */
     gpio_config(&io_conf);
diff --git a/ESP32-Rainmaker-Multidevice/multi_device/main/app_main.c b/ESP32-Rainmaker-Multidevice/multi_device/main/app_main.c
index e3c8c1abb..b6bde4da2 100644
--- a/ESP32-Rainmaker-Multidevice/multi_device/main/app_main.c
+++ b/ESP32-Rainmaker-Multidevice/multi_device/main/app_main.c
@@ -1,4 +1,12 @@
-/* Multi-Device Example
+/*  Rainmaker Multi-Device Example
+
+    Original code source: Espressif Rainmaker example code.
+
+    Created on: Jan 6, 2024
+
+    Modified on: Jan 6, 2024
+
+    Edited by: Alexander Bobkov
 
    This example code is in the Public Domain (or CC0 licensed, at your option.)
 
diff --git a/ESP32-Rainmaker-Multidevice/multi_device/main/app_priv.h b/ESP32-Rainmaker-Multidevice/multi_device/main/app_priv.h
index f96bc5095..a65fb2f54 100644
--- a/ESP32-Rainmaker-Multidevice/multi_device/main/app_priv.h
+++ b/ESP32-Rainmaker-Multidevice/multi_device/main/app_priv.h
@@ -9,6 +9,7 @@
 #include <stdint.h>
 #include <stdbool.h>
 
+// Default values
 #define DEFAULT_SWITCH_POWER        true
 #define DEFAULT_LIGHT_POWER         true
 #define DEFAULT_LIGHT_BRIGHTNESS    25