This archive contains information and sample programs to communicate
with the UT81 ScopeMeter by UNI-Trend. This is a low-cost ScopeMeter
from China.

This information has been obtained unofficially from observation of the
characteristics of a UT81B unit, and has not been endorsed or validated
by UNI-Trend in any way. It is presented "as is" and with absolutely no
guarantee that it is correct, or that use of it will not damage your
device. Make use of it entirely at your own risk.

Files:

README.TXT   - This file
UT81.JPG     - Photo of UT81 (in case you are wondering what this is about).
REVIEW.TXT   - My take on the UT81
PROTOCOL.TXT - Description of UT81 IR/serial protocol.
RS232.TXT    - Information on how to build an RS-232 interface cable.
RS232.JPG    - Photo to help you envision the cable construction.
UT81.COM     - Sample DOS program to display/store UT81 status records.
UT81.C       - Source code to ""
UT81TEST.COM - Sample DOS program helpful in examining UT81 status records.
UT81TEST.C   - Source code to ""

UT81.COM is a sample program which retrieves status records from the UT81
and generates a "scope" display and data fields similar to those that you
can see on the ScopeMeter itself. It also allows you to save the data into
a file and view it later.

   UT81 C=1-4        = Interface with UT81 on COMn
   UT81 file         = Load & display data from 'file'

UT81TEST.COM is a sample program which displays the content of the status
records from the UT81 - this was my primary tool for reverse engineering
the protocol. Simply press SPACE to get/display another status record from
the meter.


Dunfield Development Services (DDS) offers software and firmware
development services specializing in systems and embedded applications.
For more information, visit: http://www.dunfield.com

