Specifications

Appendix A - Smart-Frame Protocol Command Reference CARROLL TOUCH

A-10 Touch System Programmer’s Guide

Echo_Off (21H) (!)

Command Description

The Echo_Off (21H) command turns off Echo Mode. The Echo_Off

character is not sent back to the host. Echo_Off is the system default.

Example

The example below sends the Echo_On (20H) command, followed by

a test sequence that checks every bit position, and ends with the

Echo_Off (21H) command.

20 01 02 04 08 10 20 40 80 21

Note

While Echo Mode is on, wait for each byte to be echoed back

before sending the next byte to the touch system.