Re: RF in TINI

Suresh...

Well, seeing as you want full-duplex...and you want control over the link
layer...I'd suggest you look for something that can be driven via a databus
rather than serial port. I doubt very much that you'll have enough control
over the link layer with a serial based unit as it'll function more like a
"radio modem" than a radio.

TINI's databus is quite easy to use via BitPort/DataPort, but you have to be
careful with CMOS loading on the bus.

-marc

On 26/6/03 13:47, "Suresh Purini" 
<suresh1-rEkehDDEPI54piUD7e9S/g@xxxxxxxxxxxxxxxx> wrote:

> 
> Marc,
> 
> Thanks a lot. I checked the site and they do have duplex modules. Can I
> ask you one more question. How can I interface the module thru TINI. Like
> can I just plug in the module to the serial port or does it require
> anything more. Sorry if its very trivial. I know very little about these
> low level stuff.
> 
> Suresh
> 
> 
> On Thu, 26 Jun 2003, Marc Nicholas wrote:
> 
>> http://www.laipac.com
>> 
>> Their 434Mhz modules cost less than US$10 for the receiver/transmitter...and
>> accept "raw" input via a single pin. These are simplex devices,
>> however...I'm still not 100% sure if you want duplex operation.
>> 
>> If you want full-duplex, Laipac have some solutions as do other vendors.
>> 
>> 
>> -marc
>> 
>> On 26/6/03 13:32, "Suresh Purini" 
>> <suresh1-rEkehDDEPI54piUD7e9S/g@xxxxxxxxxxxxxxxx> wrote:
>> 
>>> 
>>> 
>>> Marc,
>>> 
>>>> What sort of range and bandwidth/latency can you live with? You've got a
>>>> lot
>>>> of options -- the requirements you've listed only really cover the
>>>> application layer, not the link layer ;-)
>>> 
>>> 
>>> :) ..  Its an experimental system where we will be testing our stuff in a
>>> lab(room). So 30m range is good enough for us.
>>> 
>>> Regarding bandwidth and latency requirements, there are really no hard
>>> constraints. Something which is cheap(btwn 100-200$) will serve.
>>> 
>>> What I am wondering if its a blutooth device, will the MAC protocol be
>>> built into the device in which case I cannot experiment with my MAC
>>> protocols. I want something on which I have explicit control like when I
>>> can put the device into sleep mode or send/receive data, things like that.
>>> 
>>> Suresh
>>> 
>>> 
>>> 
>>>> -marc
>>>> 
>>>> 
>>>> On 26/6/03 12:46, "Suresh Purini" 
>>>> <suresh1-rEkehDDEPI54piUD7e9S/g@xxxxxxxxxxxxxxxx> wrote:
>>>> 
>>>>> 
>>>>> Thanks a lot for all of you.
>>>>> 
>>>>> I am giving more details about my project.
>>>>> 
>>>>> 
>>>>> We are trying to develop "Reconfigurable MiddleWare(based on CORBA)" for
>>>>> embedded systems. As a part of this project we are looking at protocol
>>>>> stack composability depending on user requirements. For example the user
>>>>> can choose a naive MAC protocol or some power aware MAC protocol as a part
>>>>> of his application development.
>>>>> 
>>>>> And we statically compose the middleware depending on the users QOS
>>>>> requirements(so that the memory footprint will be small).
>>>>> 
>>>>> We want to demonstrate the aforementioned project using few embedded
>>>>> devices.
>>>>> 
>>>>> So I am just wondering whether I can find a very easy way to hook up an RF
>>>>> interface to TINI(I am not expert in desigining circuits :( :)).  Also I
>>>>> want to measure the power consumption of the system.
>>>>> 
>>>>> I will try to look in the directions pointed by you.
>>>>> 
>>>>> Thanks once again.
>>>>> 
>>>>> Sincerely
>>>>> Suresh
>>>>> 
>>>>> On Thu, 26 Jun 2003, Marc Nicholas wrote:
>>>>> 
>>>>>> Well, yes it's possible to use various types of embedded radios...
>>>>>> 
>>>>>> However, if you're planning on selling a commercial product with an
>>>>>> embedded
>>>>>> radio module (and not a device such as a radio modem), do bear in mind
>>>>>> that
>>>>>> you'll need to have the whole unit FCC certified.
>>>>>> 
>>>>>> If it's just a private use project, you can just use an ISM band radio
>>>>>> modem...although most of the ISM modules don't generally have enough
>>>>>> power
>>>>>> to be useful for remote telemetry applications (what's your
>>>>>> application?).
>>>>>> 
>>>>>> 
>>>>>> -marc
>>>>>> 
>>>>>> On 26/6/03 08:19, "Suresh Purini" 
>>>>>> <suresh1-rEkehDDEPI54piUD7e9S/g@xxxxxxxxxxxxxxxx> wrote:
>>>>>> 
>>>>>>> 
>>>>>>> Hi-
>>>>>>> 
>>>>>>> I am new to TINI and embedded systems in general. Is it possible to have
>>>>>>> an RF network interface for TINI. I also want the embedded system to be
>>>>>>> powered by battery as i want to measure the power usage(working on some
>>>>>>> power aware protocols).
>>>>>>> 
>>>>>>> Any help in this regard is well appreiciated.
>>>>>>> 
>>>>>>> Thanks in Advance.
>>>>>>> 
>>>>>>> Sincerely
>>>>>>> Suresh
>>>>>>> 
>>>>>>> 
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>>>>>> 
>>>>>>  
>>>>>> --------------------------------------------------
>>>>>> Marc Nicholas Geekythings Inc. C/416.543.4896
>>>>>> UNIX, Database, Security and Networking Consulting
>>>>>> 
>>>>>> 
>>>>> 
>>>>> 
>>>> 
>>>>  
>>>> --------------------------------------------------
>>>> Marc Nicholas Geekythings Inc. C/416.543.4896
>>>> UNIX, Database, Security and Networking Consulting
>>>> 
>>>> 
>>> 
>>> 
>> 
>>  
>> --------------------------------------------------
>> Marc Nicholas Geekythings Inc. C/416.543.4896
>> UNIX, Database, Security and Networking Consulting
>> 
>> 
> 
> 

 
--------------------------------------------------
Marc Nicholas Geekythings Inc. C/416.543.4896
UNIX, Database, Security and Networking Consulting

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