VADDIO EasyTalk User's Guide download pdf (Page 45)

EasyTalk USB Tools

Vaddio EasyTalk USB Solution - Document Number 342-0449 Rev B Page 45 of 48

Appendix 2: EasyUSB Mixer/Amp Serial Commands (ASCII)

The EasyUSB Mixer/Amp has an RS-232 command interface for configuration and real-time control. The

interface can be used interactively with a serial terminal emulator such as AMX or Crestron Control systems. The

DIP Switch 1 must be in disable mode for the EasyUSB Mixer/Amp to function as a Data Terminal Equipment

(DTE) device. The command echo and prompt can be enabled or disabled with the 6121 command. When

enabled, command input to the EasyUSB Mixer/Amp are echoed back, and a ‘>’ prompt character is

automatically output on a carriage return. When the command echo and prompt are disabled, the echo and

prompt characters are suppressed.

For all commands, the termination character is a carriage return (hex 0D). Responses from the EasyUSB

Mixer/Amp will end with a carriage return followed by a line feed (hex 0A).

The Baud rate of the EasyUSB Mixer/Amp is 38400. (However, if in DCE mode for direct connection to Vaddio

Cameras, baud rate will be 9600). The serial format for the EasyUSB Mixer/Amp is:

 Stop Bit: 1

 Data: 8 bit

 Parity: None

 Flow: None

The EasyUSB Mixer/Amp protocol is based upon a “Set” and “Get” scheme. Set commands automatically return

an acknowledgement upon execution.

 The “Get” command returns a string representing the current value of the queried setting.

 “Set” commands return one of three responses:

 OK (4100),

 Unknown 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. Examples of

command usage are:

 Set Command Usage: > 6101 00 <carriage return> (unmute the microphones)

 Response: > 4100 00 (Microphone not muted)

 Get Command Usage:> 5101 <carriage return> (queries current mute state)

 Response: >4101 00 (Microphone not muted)

EasyUSB Mixer/Amp Command Table

Command Argument Function Successful Response

5101 Get mute status (0=mute off, 1=mute on) 4101 bb (b=00 or 01)

5102 Get speaker volume (need range) 4102 vv (vv = volume value)

5103 Get mic volume (need range) 4103 vv (vv = volume value)

6101 0 or 1 Set mute off/on

4100 bb (bb=00 or 01, repeats 6101

argument)

6102 0 or 1 Decrement/increment speaker volume

4100 bb (bb=00 or 01, repeats 6102

argument)

6103 0 or 1 Decrement/increment mic volume

4100 bb (bb=00 or 01, repeats 6103

argument)

6121 0 or 1 Disable/enable serial echo None if arg=0, 4100 01 if arg=1

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