gnupic: Re: [gnupic] Learning PIC on the job
Subject:
Re: [gnupic] Learning PIC on the job
From:
Nicholas Robinson ####@####.####
Date:
10 Aug 2005 08:57:41 +0100
Message-Id: <200508100856.50609.npr@bottlehall.co.uk>
Many thanks to everyone who has responded with so much good advice and links.
Nick
On Monday 08 August 2005 09:42, Martyn Welch wrote:
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> On Saturday 06 Aug 2005 12:15, Nicholas Robinson wrote:
> > I haven't done anything so far, let alone blink a led!
>
> In which case I have some examples here:
>
> http://ubicomp.lancs.ac.uk/~martyn/sdcc_linux/ (Bottom of page)
>
> > It's the extent to which I need to know about the RF aspects - or can you
> > just assume the PIC components are black boxes that talk to each other?
>
> Not easily.
>
> > I'd wondered about using 18FXXXX simply because they seem to do
> > everything except the RF, but then wondered if the rfPIC12 series would
> > do what I want, but could it handle the master requirement? Or should I
> > use the 18F1220 interfaced to a rfPIC12F675K for the master with
> > individual rfPIC12F675K at the slaves?
> >
> > Or would I be better with DLP-RF1 or RF2 combination 2 2.4GHz Transceiver
> > from DLP Design? This is superficially a bit pricey compared to the PIC
> > solutions but by the time I've added it all up it might not be.
>
> We've used these in the past:
>
> http://www.radiometrix.co.uk/products/sp2.htm
>
> I guess there about as black boxy as you are going to get.
>
> They're not cheap, though the cheaper options generally have a nasty habit
> of requiring time to get working. I guess it all depends on whether this is
> a commercial design or a private one off project...
>
> At any rate, getting 12-16 devices talking wirelessly over a distance of
> 30m is going to be quite difficult, depending on bandwidth and how many
> walls are in the way (walls, people, other stuff all attenuate RF signals)
> and how much power you have - especially how much power you have. How long
> do these devices need to function for between charges and how big a battery
> do you think you can use?
>
> Good luck, it sounds like quite a fun project, though it's going to be a
> lot of work.
>
> Martyn
>
> - --
> Martyn Welch ####@####.####
>
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