As a test : only one small file for Arduino IDE

rest of the files for PlatformIO.
Only one file appears in Arduino IDE, though. :(

ampel-firmware.ino

+/***
+ *       ____ ___ ____       _                         _
+ *      / ___/ _ \___ \     / \   _ __ ___  _ __   ___| |
+ *     | |  | | | |__) |   / _ \ | '_ ` _ \| '_ \ / _ \ |
+ *     | |__| |_| / __/   / ___ \| | | | | | |_) |  __/ |
+ *      \____\___/_____| /_/__ \_\_| |_| |_| .__/ \___|_|         _
+ *     | | | |/ _|_   _| / ___|| |_ _   _| |_| |_ __ _  __ _ _ __| |_
+ *     | |_| | |_  | |   \___ \| __| | | | __| __/ _` |/ _` | '__| __|
+ *     |  _  |  _| | |    ___) | |_| |_| | |_| || (_| | (_| | |  | |_
+ *     |_| |_|_|   |_|   |____/ \__|\__,_|\__|\__\__, |\__,_|_|   \__|
+ *                                               |___/
+ */
+
+#include "src/ampel-firmware.h"

platformio.ini

@@ -8,7 +8,7 @@
 ; http://docs.platformio.org/page/projectconf.html
 
 [platformio]
-src_dir = ampel-firmware
+src_dir = src
 
 [env:esp8266]
 platform = espressif8266