updated readme and added template for wifi creds

README.md

-### Steps to run it
+### __How-To use this Project__
 
-https://arduino-esp8266.readthedocs.io/en/latest/ota_updates/readme.html
-
-##### create "include/wifi_credentials.h"
+1. Download and install [Visual Studio Code](https://code.visualstudio.com/download) 
+2. Install [PlatformIO IDE extension](https://platformio.org/install/ide?install=vscode) for Visual Studio Code 
+3. Create [wifi_credentials.h](include/wifi_credentials.h) from [templ_wifi_credentials.h](include/templ_wifi_credentials.h) in include/
 
 ```cpp
 #ifndef __WIFI_CREDENTIALS_H
 #endif // __WIFI_CREDENTIALS_H
 ```
 
-##### platformio.ini
-see templ_platformio_ini
-
-```ini
-[env:<BOARD>]
-platform = espressif8266
-board = <BOARD>
-framework = arduino
-monitor_speed = 115200
-
-extra_scripts = pre:extra_script.py
-
-; stuff for OTA 
-; https://docs.platformio.org/en/latest/platforms/espressif8266.html#over-the-air-ota-update
-upload_protocol = espota
-upload_port = <IPADRESS>
-upload_flags =
-  --port=8266
-  --auth=admin
+4. Create [platformio.ini](platformio.ini) from [templ_platformio_ini](templ_platformio_ini)
+
+```bash
+$ cp templ_platformio_ini platformio.ini
 ```
 
+5. __Uploading new firmware__
+```bash
+# upload program via ota
+$ pio run -t upload
+# upload file system via ota
+$ pio run -t uploadfs
+
+# upload program via Serial Port
+# Serial Port needs to be selected in platformio.ini
+$ pio run -t upload -e serial
+# upload file system via Serial Port
+$ pio run -t uploadfs -e serial
+```
+
+------
+
+Additional used sources and  libraries in this project and [DOKU.md](DOKU.md)
+- https://arduino-esp8266.readthedocs.io/en/latest/ota_updates/readme.html
+- https://github.com/NachtRaveVL/PCA9685-Arduino
+- https://arduino-esp8266.readthedocs.io/en/latest/gdb.html
+- check different environments inside [platformio.ini](platformio.ini)

include/templ_wifi_credentials.h

+#ifndef __WIFI_CREDENTIALS_H
+#define __WIFI_CREDENTIALS_H
+
+#ifndef STASSID
+#define STASSID "ssid"
+#define STAPSK  "key"
+#endif
+
+#endif // __WIFI_CREDENTIALS_H