Documentation for the first setup updated

Readme.md

@@ -1,11 +1,25 @@
 # ESP Wordclock
 ## Setup
-Generate a wlancfg.lua for your wifi based on the given example wlancfg.lua.example
 
-Copy the required files to the microcontroller:
+Install the firmware on the ESP:
+The ESP must be set into the bootloader mode, like [this](https://www.ccc-mannheim.de/wiki/ESP8266#Boot_Modi)
+
+The firmware can be downloaded with the following script:
 <pre>
- sudo ./programESP.sh serial wlancfg.lua.lua wlancfg.lua
- sudo ./programESP.sh serial init.lua init.lua
+cd os/
+./flash.sh ttyUSB0
+</pre>
+
+Reboot the ESP, with a serial terminal,
+format the filesystem with the following command and reboot it:
+<pre>
+file.format()
+node.reboot()
+</pre>
+
+Then disconnect the serial terminal and copy the required files to the microcontroller:
+<pre>
+./tools/initialFlash.sh /dev/ttyUSB0
 </pre>
 
 ## Internal Setup