Initial project creation, blank without any custom code

code/main/CMakeLists.txt

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+# See the build system documentation in IDF programming guide
+# for more information about component CMakeLists.txt files.
+
+idf_component_register(
+    SRCS main.c         # list the source files of this component
+    INCLUDE_DIRS        # optional, add here public include directories
+    PRIV_INCLUDE_DIRS   # optional, add here private include directories
+    REQUIRES            # optional, list the public requirements (component names)
+    PRIV_REQUIRES       # optional, list the private requirements
+)

code/main/Kconfig.projbuild

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+# put here your custom config value
+menu "Example Configuration"
+config ESP_WIFI_SSID
+    string "WiFi SSID"
+    default "myssid"
+    help
+	SSID (network name) for the example to connect to.
+
+config ESP_WIFI_PASSWORD
+    string "WiFi Password"
+    default "mypassword"
+    help
+	WiFi password (WPA or WPA2) for the example to use.
+endmenu

code/main/main.c

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+#include <stdio.h>
+#include <stdbool.h>
+#include <unistd.h>
+
+void app_main(void)
+{
+    while (true) {
+        printf("Hello from app_main!\n");
+        sleep(1);
+    }
+}