Parasound Halo P3 Manual

♦Hardware Specifications:

Protocol
Baud Rate :9600 bps – serial numbers below 02101 (1way RS232)
38400 bps – serial numbers above 02101 (2 way RS232)
Data Bit :8 bits
Stop Bit :1 bits
Parity : None
Flow Cntrl : No
Connector & Pin definition
Actual Machine Connector
PC Connector
Use straight through cable
(NOT a Null-Modem cable)
PC
Pin 2 RxD -------
Pin 3 TxD -------
Pin 5 Gnd -------

♦String Format :

Command
Power On
Power Off
Volume Up
Volume Down
Tone
Mute
Input Direct 1
Input Direct 2
Halo P3 RS232 Guide
: Female DB9
: Male DB9
Actual Machine
TxD Pin 2
RxD Pin 3
Gnd Pin 5
ASCII (not decimal) and hexadecimal examples are shown below.
The commas in the Hex example are merely for your ease of reading
and are not required in transmission. All strings must have a space
(line feed) between each number (except two digit numbers). In the
Hex examples the space is already represented with code "20." The
end of each string must have a carriage return after the last number
with no space in-between, this is represented by "<CR>."
String ASCII
1 17 1 1<CR>
1 17 1 2<CR>
1 17 1 25<CR>
1 17 1 29<CR>
1 17 1 21<CR>
1 17 1 22<CR>
1 17 1 34<CR>
1 17 1 35<CR>
1
String Hexadecimal
31,20,31,37,20,31,20,31<CR>
31,20,31,37,20,31,20,32<CR>
31,20,31,37,20,31,20,32,35<CR>
31,20,31,37,20,31,20,32,39<CR>
31,20,31,37,20,31,20,32,31<CR>
31,20,31,37,20,31,20,32,32<CR>
31,20,31,37,20,31,20,33,34<CR>
31,20,31,37,20,31,20,33,35<CR>