[oopic] Re: Trouble with PC communicating with OOPIC-R

--- In oopic@yahoogroups.com, "Larry M. Leitch" <k3fit@...> wrote:
>
> Hi Folks,
>
> I keep getting the "Cable Not Found" message when I try to connect to
> the OOPIC to program it.
>
> Do I need a Null-Modem? I think the answer is NO.

No...

>
> Do I need an RS-232 to TTL Converter? I think the answer is YES and I
> use one (a UTEK)

NO! The DB9 connector on the R board has (almost) RS232 levels. You
should use a straight-through cable. Pin 2 on each end connected
together. Same for both pins 3. Same for both pins 5.

HOWEVER, the problem is that the levels are ALMOST RS232. In fact,
they aren't even close. The board will almost always work with a
straight cable to a real RS232 port on the PC. Sometimes it won't
work with USB cables. It depends on the cable. You might try
http://www.cablesnmor.com/index.asp?PageAction=VIEWPROD&ProdID=165

Richard

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