update README

README.md

@@ -6,9 +6,33 @@
 
 LCD-Shield for the Maker Pi Pico Board.
 
-<div id='3.-Literaturverzeichnis'/>
+<div id='1.-Schematic'/>
 
-## 1. Literaturverzeichnis
+## 1. Schematic
+
+![](Pics/Raspberry_Pi_Pico_LCD_Shield.svg)
+
+<div id='2.-Pinout'/>
+
+## 2. Pinout
+
+
+**Component** | **Pin** | **Comment**
+---------|----------|---------
+***LCD I2C SDA*** | *GP2* | I2C Data Line
+***LCD I2C SCL*** | *GP3* | I2C Clock Line
+***LCD Backlight*** | *GP28* | LCD Backlight (dimmable)
+***Button Up*** | *GP6* | Button active high (pull-down requiered)
+***Button Down*** | *GP7* | Button active high (pull-down requiered)
+***Button Right*** | *GP8* | Button active high (pull-down requiered)
+***Button Left*** | *GP9* | Button active high (pull-down requiered)
+***LED Green*** | *GP16* | LED active high (dimmable)
+***LED Red*** | *GP17* | LED active high (dimmable)
+
+
+<div id='3.-Bibliography'/>
+
+## 3. Bibliography
 
 &nbsp;&nbsp;&nbsp; **[1]**&nbsp; Micropython Docs  
 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; *Quick reference for the RP2*  
@@ -38,4 +62,4 @@ Tobias Müller, M. Eng.
 Dipl. Ing. Harald Prütting  
 :e-mail: [Harald.Pruetting@HS-Anhalt.de](mailto:Harald.Pruetting@HS-Anhalt.de)
 
- :copyright: es-lab.de, 23.08.2023
+ :copyright: es-lab.de, 26.03.2024