Did the TP4000ZC output the bit pattern shown on the LCD like the radio 
shack meter does?

Tony


late4dinner wrote:
>
> Mark Rages wrote:
>   
>> Hi,
>>
>> I'm looking for a low-cost data acquisition device. I want to
>> interface to one of these meters:
>>   Circuit Specialists MAS-345
>> http://www.circuitspecialists.com/prod.itml/icOid/4003
>>
>> The same looking meter is sold by several vendors:
>>   Mastech MAS-343
>>   Velleman DVM345DI
>>   Global Specialties PRO-70. http://www.globalspecialties.com/pro70.html
>>
>> Similar but different:
>>   Radio Shack 22-812 (some code at
>> http://www.kronosrobotics.com/Projects/rsmeter.shtml )
>>   TekPower TP4000ZC
>>
>> Anyone have experience interfacing with these? (not using the included
>> Windows software.)
>>
>> Regards,
>> Mark
>> markrages@gmail
>> -- 
>> Mark Rages, Engineer
>> Midwest Telecine LLC
>> markrages@midwesttelecine.com
>> -- 
>> http://www.piclist.com PIC/SX FAQ & list archive
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>>
>>     
>
> In case anyone is still interested, I've written a simple C program to read
> the serial output from the TP4000ZC meter.  I wrote it on Linux, but doesn't
> use anything fancier than read(), so it should compile on most platforms
> (BSD/Solaris/Windows etc) with little or no effort.
>
> It also documents the protocol for those that want to roll their own.
>
> I suspect the same chip was used in other meters, so other meters with 14
> bytes of data may be compatible.
>
> Send mail to mason at steelypip dot org if you'd like a copy, I'm not a
> regular user of this forum.
>
> Oh yeah - if you've got one of these meters then open it up and look at the
> isolation used on the serial port.  It gave me a laugh.
>
>   
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