XPression GPI wiring:
The XPression system has a 25-pin port which is labeled GPI I/O. The pinouts include:
1 – GND
2 – GPI IN 12
3 – GPI IN 11
4 – GPI IN 10
5 – GPI IN 9
6 – GPI IN 8
7 – GPI IN 7
8 – GPI IN 6
9 – GPI IN 5
10 – GPI IN 4
11 – GPI IN 3
12 – GPI IN 2
13 – GPI IN 1
14 – GPI OUT 12
15 – GPI OUT 11
16 – GPI OUT 10
17 – GPI OUT 9
18 – GPI OUT 8
19 – GPI OUT 7
20 – GPI OUT 6
21 – GPI OUT 5
22 – GPI OUT 4
23 – GPI OUT 3
24 – GPI OUT 2
25 – GPI OUT 1