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Re: [avr-gcc-list] radio communications
From: |
Geoffrey Wossum |
Subject: |
Re: [avr-gcc-list] radio communications |
Date: |
Wed, 17 Sep 2003 09:02:10 -0500 |
User-agent: |
KMail/1.5 |
On Wednesday 17 September 2003 04:05 am, Jack Valmadre wrote:
> I need a robot communications unit that can send data back and forward
> between two robots a maximum of 4 metres apart. Both will probably be
> using an ATMega32, but I'm not sure at this point. Does anyone know of any
> good radio units for this application? Thanks,
We're currently using a ChipCon CC1000 (http://www.chipcon.com) transceiver,
up in the 900 MHz ISM band. This chip is nice because it's low power,
requires a few external parts, and (in theory) is pretty lenient on board
layout. We can't get the range we need for target applications, though, even
with an external power amp. It appears noise from our board is getting
coupled into the IF section of the receiver. But for what you describe, my
experience says it would be fine.
We're currently evaluating a Honeywell ROC0935C. It looks to a very nice
part, with great range, even at high speed (> 100 kbps), without an external
power amp. I haven't actually gotten my boards to the point of actually
transmitting yet (just started yesterday). I'm not sure if this part is
production yet. If not, its supposed to be in production RSN.
---
Geoffrey Wossum
Software Engineer
Long Range Systems - http://www.pager.net