discrete rotator

GS-232A
Computer Control Interface for Antenna Rotators

COM port settings

1200 baud, 8 data bits, 1 stop bit, no parity, no handshake
for 16 MHz crystal

Angles

angle	relay
0-45	north
46-135	east
136-225	south
226-315	west
316-405	north
406-450	east

Pinout

pin arduino	port ATmega328	name	direction	configure	active
2	PD2	relay north	out	push-pull	high
3	PD3	relay east	out	push-pull	high
4	PD4	relay south	out	push-pull	high
5	PD5	relay west	out	push-pull	high
6	PD6	key north	in	pull-up	low
7	PD7	key east	in	pull-up	low
8	PB0	key south	in	pull-up	low
9	PB1	key west	in	pull-up	low
13	PB5	led	out	push-pull	high