Kontrolliere bitte nochmal:

1 VSS ===> GND
2 VDD ===> +5V
3 VEE ===> GND
4 RS ===> PB6
5 R/W ===> GND
6 E ===> PB7
7 D0 ===>
8 D1 ===>
9 D2 ===>
10 D3 ===>
11 D4 ===> PB0
12 D5 ===> PB1
13 D6 ===> PB2
14 D7 ===> PB3

17 LED+ ===> +5V
18 LED - ===> über Rv (ca. 100 Ohm) an PD7

Bernhard