Manual

Optional AutoTrak 2.0 EasyTalk Wireless Audio Interface
Optional AutoTrak 2.0 EasyTalk Wireless Audio Interface - Document Number 342-0387 Rev B Page 10 of 12
Appendix 1: Pin-outs and Stuff
RS-232 Control: DE-9 Female (DB-9 for convention):
Communication Specification
Communication Speed: 9600 bps or 38,400
Stop bit: 1
Data bits: 8
Parity: None
No Flow control
Control Port - RS-232 on DE-9 Female Connector
PIN# Signal
2) TXD
3) RXD
5) GND
All other pins - Unused
AutoTrak II Audio User Serial Command Set:
The EasyTalk AutoTrak 2.0 Wireless Audio Interface has an RS-232 command interface for configuration and
real-time control. This interface can be used interactively with a serial terminal emulator, or through a scripted
interface without terminal emulation (command echo and prompt). DIP switch 7 on the Receiver unit controls
whether configuration commands are enabled on the serial interface (switch in the up position), or whether the
configuration is controlled exclusively from the DIP switches (switch in the down position). Real-time control
commands are always available over the serial port.
Command echo and prompt can be enabled or disabled with the 6121 command. When enabled, commands
input to the receiver are echoed back, and a '>' prompt character is output whenever a carriage return is entered.
When disabled the echo and prompt characters are suppressed.
For all commands, the termination character is a carriage return (hex 0D). Response strings output by the
Receiver will end with both a carriage return and a line feed (hex 0A). Input line feed characters are ignored.
“Set” commands return one of three responses: OK (4100), bad command (4199), or bad parameter (4198).
“Get” commands return a response string indicating the command being responded to and the data requested.
The format of a “get” response is a 4-digit response code, a space, and a two-digit hex value
Command Set Table:
Command
Response
Argument Available w/ DIP 7
Down
Description
5101 none Y Get mute status
4101 00 – off n/a Mute status response
01 – on
5102 none Y Get volume
4102 nn Volume response where nn is:
FB : -5 dB
FC : -4 dB
…
FF : -1 dB
00 : 0 dB
…
29 : 29 dB
5110 none Y Get compressor enabled
4110 00 – disabled n/a Compressor enabled response
01 – enabled
5111 none Y Get filter enabled
4111 00 – disabled n/a Filter enabled response
01 – enabled