diff --git a/examples/0014-espressif_esp32_send_data/CMakeLists.txt b/examples/0014-espressif_esp32_send_data/CMakeLists.txt
index 9a229e0f..baa4fcfe 100644
--- a/examples/0014-espressif_esp32_send_data/CMakeLists.txt
+++ b/examples/0014-espressif_esp32_send_data/CMakeLists.txt
@@ -1,3 +1,8 @@
+# For more information about build system see
+# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
+cmake_minimum_required(VERSION 3.5)
+project(ESP32_SEND_DATA)
+
 # Specify all source files to keep the project compatible with espidf build system
 idf_component_register(
     SRCS
diff --git a/examples/0015-espressif_esp32_process_OTA_MQTT/CMakeLists.txt b/examples/0015-espressif_esp32_process_OTA_MQTT/CMakeLists.txt
index 0df74189..198da8b8 100644
--- a/examples/0015-espressif_esp32_process_OTA_MQTT/CMakeLists.txt
+++ b/examples/0015-espressif_esp32_process_OTA_MQTT/CMakeLists.txt
@@ -1,3 +1,8 @@
+# For more information about build system see
+# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
+cmake_minimum_required(VERSION 3.5)
+project(ESP32_PROCESS_OTA)
+
 # Specify all source files to keep the project compatible with espidf build system
 idf_component_register(
     SRCS