If you connect the CME-8000 module directly to the PIC's serial port
(assuming you take care of the voltage converter circuitry), you will
only get loopback characters.
I have another module from C-MAX that sits between the CME-8000 and my
PIC, and this takes care of the weird one-wire serial interface that C-
MAX seems to have implemented. I was trying to look for the part
number on the C-MAX website, but I couldn't find it.

There is, however, a schematic for this circuit at the link below.

(Click on CME8000-BUS - RS232 converter -> download : the file is a
pdf)
http://c-maxgroup.com/downloads/search.php?search=CME8000-BUS&PHPSESSID=786b7279122b4582117aeaa046bebed4

Another thing I noticed was that using their PC demo software (also
available on the page I linked to) failed when using my laptop and a
USB->Serial Port converter. I had to use a desktop computer with a
"real" serial port to get the CME8000 to respond.

Hope that helped,

Amit Singh


On Feb 6, 5:29 pm, Michael Harpe <m...@ple-technology.com> wrote:
> I connected the CME-8000 to the serial port of a PIC 18F. All I get is
> the characters I sent looped back to me.
>
> If you need more information please email me directly.
>
> Thanks!
>
> Mike Harpe
>
> On 2007-02-02 20:09:31 -0500, amitpaulsi...@gmail.com said:
>
> > Can you give me any more details?
>
> > I'm working on the C-MAX CME8000BUS-LP-01 right now and I may be able
> > to help you out.
>
> > On Dec 19 2006, 6:29 pm, Michael Harpe <m...@ple-technology.com>
> > wrote:
> >> I'd like to talk to anyone who has worked with theC-MAXCME800-BUS
> >> WWVB receiver board.
>
> >> I have tried working with this part to the point of wanting to smash it
> >> with a mallet. I am trying to use it with a PIC 18F microprocessor and
> >> all I can get the thing to do is echo characters right back to the PIC.
>
> >> Anyway, any help is welcomed.
>
> >> Thanks!
>
> >> Mike Harpe

I connected the CME-8000 to the serial port of a PIC 18F. All I get is 
the characters I sent looped back to me.

If you need more information please email me directly.

Thanks!

Mike Harpe

On 2007-02-02 20:09:31 -0500, amitpaulsingh@gmail.com said:

> Can you give me any more details?
> 
> I'm working on the C-MAX CME8000BUS-LP-01 right now and I may be able
> to help you out.
> 
> On Dec 19 2006, 6:29 pm, Michael Harpe <m...@ple-technology.com>
> wrote:
>> I'd like to talk to anyone who has worked with theC-MAXCME800-BUS
>> WWVB receiver board.
>> 
>> I have tried working with this part to the point of wanting to smash it
>> with a mallet. I am trying to use it with a PIC 18F microprocessor and
>> all I can get the thing to do is echo characters right back to the PIC.
>> 
>> Anyway, any help is welcomed.
>> 
>> Thanks!
>> 
>> Mike Harpe

Can you give me any more details?

I'm working on the C-MAX CME8000BUS-LP-01 right now and I may be able
to help you out.

On Dec 19 2006, 6:29 pm, Michael Harpe <m...@ple-technology.com>
wrote:
> I'd like to talk to anyone who has worked with theC-MAXCME800-BUS
> WWVB receiver board.
>
> I have tried working with this part to the point of wanting to smash it
> with a mallet. I am trying to use it with a PIC 18F microprocessor and
> all I can get the thing to do is echo characters right back to the PIC.
>
> Anyway, any help is welcomed.
>
> Thanks!
>
> Mike Harpe

I'd like to talk to anyone who has worked with the C-MAX CME800-BUS 
WWVB receiver board.

I have tried working with this part to the point of wanting to smash it 
with a mallet. I am trying to use it with a PIC 18F microprocessor and 
all I can get the thing to do is echo characters right back to the PIC.

Anyway, any help is welcomed.

Thanks!

Mike Harpe