RS-232 serial communication: 9600 baud No parity 8 bits 1 stop bit

SETUP AS NEEDED:
[?]
[E] = ECHO
[e] = NO ECHO (default)
[F] = REPEAT COMMAND IN ANSWER
[f] = NO REPEAT COMMAND (only answer) (default)
[L] = ENABLE ECHO & ADD LF TO CR IN ECHO
[l] = DISABLE LF TO CR (default)
[A] = ENABLE ACKNOWLEDGE (used for mass loading of eeprom (tables)
[a] = DISABLE ACKNOWLEDGE (default)
[C] = ENABLE ADD CR/LF TO FEEDBACK
[c] = DISABLE ADD CR/LF TO FEEDBACK (default)
[S] = SETUP MODULE SEQUENCE & RETURN NUMBER OF UNITS
[R] = RESET MODULES

[XXYY]
XX = 00 to 32 = ZN= ZONE NUMBER (00= GLOBAL/ALL ZONES)
YY = COMMAND
EXCEPT THAT [99ZZ] MEANS SEND MACRO NUMBER 01 TO 64
ZN 01 ON
ZN 02 OFF
ZN 03 A AMP
ZN 04 B AMP
ZN 07 VOLUME UP
ZN 08 VOLUME DOWN
ZN 09 SET LEVEL 0
ZN 10 SET LEVEL 1
ZN 11 SET LEVEL 2
ZN 12 SET LEVEL 3
ZN 13 SET LEVEL 4
ZN 14 SET LEVEL 5
ZN 15 SET LEVEL 6
ZN 16 SET LEVEL 7
ZN 17 SET LEVEL 8
ZN 18 SET LEVEL 9
ZN 19 SET LEVEL 10
ZN 20 SET LEVEL 11
ZN 32 ? STATUS
ZN 33 ? LEVEL
ZN 34 ? ON/OFF
ZN 35 ? A/B

ZONE= 00 MODULE= ESS7
GROUP KEY RS-232 COMMAND
XXX YYY [0001] ON
XXX YYY [0002] OFF
XXX YYY [0003] A AMP
XXX YYY [0004] B AMP
XXX YYY [0007] VOLUME UP
XXX YYY [0008] VOLUME DOWN
XXX YYY [0009] SET LEVEL 0
XXX YYY [0010] SET LEVEL 1
XXX YYY [0011] SET LEVEL 2
XXX YYY [0012] SET LEVEL 3
XXX YYY [0013] SET LEVEL 4
XXX YYY [0014] SET LEVEL 5
XXX YYY [0015] SET LEVEL 6
XXX YYY [0016] SET LEVEL 7
XXX YYY [0017] SET LEVEL 8
XXX YYY [0018] SET LEVEL 9
XXX YYY [0019] SET LEVEL 10
XXX YYY [0020] SET LEVEL 11
XXX YYY [0032] ? STATUS
XXX YYY [0033] ? LEVEL
XXX YYY [0034] ? ON/OFF
XXX YYY [0035] ? A/B


STATUS XY
X = A/B/ON/OFF
0 = OFF & A AMP
1 = ON & A AMP
2 = OFF & B AMP
3 = ON & B AMP
Y = LEVEL
0 = LEVEL=0
1 = LEVEL=1
2 = LEVEL=2
3 = LEVEL=3
4 = LEVEL=4
5 = LEVEL=5
6 = LEVEL=6
7 = LEVEL=7
8 = LEVEL=8
9 = LEVEL=9
A = LEVEL=10
B = LEVEL=11