llile@SALTONUSA.COM writes:

Hi

You got a lot of interesting points. Well, I am mostly a software guy,
so I will try to answer the questions that I can. I am not with the
circuit file with right now to answer everything. But I think that you
got two good point which I will comment.

> Do you have software that can recover from a WDT or brownout reset in a
> controlled manner?

No. At least I think I don't have. I don't know how to do it with
Hi-TECH C. I will try take a look to see how to do it.

>  Do you have WDT enabled so that if the program hangs,
> you reboot?

I don't have this also.


> Are you running at 5V?  5V circuits are inherently more noise immune than
> 3V.

Yes, I am running at 5V.

>
> Is the remote system on the same battery as your PIC? If so, you have all
> the right conditions for a ground loop nightmare.  More power could
> literally be flowing through the serial connector ground pins than the
> battery ground pins, causing all sorts of ghostly, wierd, and hard to
> explain phenomena.

I am connecting a computer system to the battery supplied one.

> Optoisolated inputs, as Dennis mentioned, will protect your PIC power from
> external hiccups nicely and prevent wierd activity from ground
> loops.

I think that this is a good option also.

I will consider the other observations that you did with the guy that
is more concerned with the hardware.

If you have more ideas, feel free to tell,

Rodrigo

--
http://www.piclist.com hint: The list server can filter out subtopics
(like ads or off topics) for you. See http://www.piclist.com/#topics