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'[EE] Wireless communication chip options.'
2007\06\07@160728 by Alexandre Guimar„es

face picon face
Hi,

   I have a new project where I will need to make a wireless link between a
few devices around a 20 meters perimeter. The protocol can be a simple
master/slave protocol and should not be a problem to code. The hard time I
am having is selecting a wireless chip that I can make to work with little
RF knowledge and that I can buy easily in small quantities. Data speed is
also not a big problem as I can live quite well with 19200 bps troughput.

   So far the best option I have found is the Nordic NrF240L01.. Can you
guys point me to some other inexpensive and easy to interface parts ?

Best regards,
Alexandre Guimaraes

2007\06\07@163508 by Marcel Duchamp

picon face
Alexandre Guimarães wrote:
> Hi,
>
>     I have a new project where I will need to make a wireless link between a
> few devices around a 20 meters perimeter. The protocol can be a simple
> master/slave protocol and should not be a problem to code. The hard time I
> am having is selecting a wireless chip that I can make to work with little
> RF knowledge and that I can buy easily in small quantities. Data speed is
> also not a big problem as I can live quite well with 19200 bps troughput.
>
>     So far the best option I have found is the Nordic NrF240L01.. Can you
> guys point me to some other inexpensive and easy to interface parts ?
>
> Best regards,
> Alexandre Guimaraes
>

I did a one-way link with stuff from:
http://www.radiotronix.com/

Mouser carries it.
xmitter: RCT-433-UTR about US$3.23
rx: RCR-433-RPR, US$3.07

I think these only do up to 4800 but they have others...

2007\06\07@170606 by alan smith

picon face
Take a look at these guys....just found them a few minutes ago...
 
 http://www.integration.com
 
 
 Looks interesting.  Single chip...fsk...add a 10MHz xtal and antenna.  Can run from a micro or EEPROM and has wake on change switch inputs.
 
 No idea on costs tho

Marcel Duchamp <spam_OUTmarcel.duchampTakeThisOuTspamsbcglobal.net> wrote:
 Alexandre Guimarães wrote:
{Quote hidden}

I did a one-way link with stuff from:
http://www.radiotronix.com/

Mouser carries it.
xmitter: RCT-433-UTR about US$3.23
rx: RCR-433-RPR, US$3.07

I think these only do up to 4800 but they have others...

2007\06\07@180301 by David Sincock

flavicon
face
Alexandre,

I have recently found the Jennic range of modules.

http://www.jennic.com/products/wireless_products/index.php?productID=0000000049

Rather than a chip level solution, these modules have everything already
loaded and are Zigbee compliant. Hence all of the routing, meshing, and
connection are all taken care off. A nice option is the high power unit for
longer distances. You're able to put your application code onto the modules
CPU and utilise I/O pins, and communicate via SPI or UART.

I decided that using a module that was already approved and tested would be
a lot easier and quicker to market than trying to reinvent the wheel. Leaves
me to concentrate on the application level functionality, and getting
appropriate approvals can be real pain. The modules are less than $40AU. I
quess it depends on how many you want to sell, time to market, ease of use,
etc which way will be better for you.

Regards,
David Sincock

On Friday, June 08, 2007 5:37 AM, Alexandre Guimarães wrote:
{Quote hidden}

> -

2007\06\07@200636 by Dario Greggio

face picon face
Alexandre Guimarães wrote:

>     So far the best option I have found is the Nordic NrF240L01.. Can you
> guys point me to some other inexpensive and easy to interface parts ?

I found myself very well with TRW-24 (nrf2401 based) from SparkFun. A
little trouble at the beginning, but they worked very well and are cheap
enough, and long-ranged too.

rf24L01 should be much better, but of course you have to rewrite the
software (I mean, *I* have to :)

--
Ciao, Dario

2007\06\07@235301 by John Dammeyer

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face
Hi,

Although I've now discontinued the part because with the weight of the
big guys behind Zigbee makes that so much cheaper I still think the
CANRF (http://www.canrf.com) was an ideal choice for a small simple mesh
network.  Kind of regret not going further with it using a PIC with
internal CAN and a simple stack but there are only so many hours in a
day and CNC type projects making things move were far more interesting.

John Dammeyer

Automation Artisans Inc.
http://www.autoartisans.com
Ph. 1 250 544 4950


> {Original Message removed}

2007\06\08@041134 by Alan B. Pearce

face picon face
>I have a new project where I will need to make a wireless
>link between a few devices around a 20 meters perimeter.
>The protocol can be a simple master/slave protocol and should
>not be a problem to code. The hard time I am having is
>selecting a wireless chip that I can make to work with little
>RF knowledge and that I can buy easily in small quantities.
>Data speed is also not a big problem as I can live quite well
>with 19200 bps troughput.
>
>So far the best option I have found is the Nordic NrF240L01..
>Can you guys point me to some other inexpensive and easy to
>interface parts ?

I think this chip will be way outside what you want, but others may find an
interest in it.

Analog Devices ADF7021
Frequency 80-650MHz, 426 to 470MHz, and 852 to 940 MHz to cover the license
free ISM bands, targeted at European ETSI-EN 300 220, Japanese ARIB-T67,
Chinese short-range device regulations, and NI FCC Part 15, Part 90 and Part
95.

Modulation FSK, GFSK, 3 FSK, and 4 FSK, and there is provision for this to
be done on a fall back basis.

Data rate 0.5 to 32.8 kbps.

IF bandwidth 12.5kHz, 18.75kHz, and 25kHz

AFC, PA ramping during power level changes, and UART interface.

The sheet that came across my desk mentions $2.85 for >1k lots, recommended
lowest grade resale FOB USA - well that is the quote from the front of the
brochure ;)

*** GOTCHA department - do check out the errata sheet, this looks like the
early versions of the chip have a problem with one of the modulation modes.

2007\06\26@145307 by Vitaliy

flavicon
face
Alexandre Guimarães wrote:
>    I have a new project where I will need to make a wireless link between
> a
> few devices around a 20 meters perimeter. The protocol can be a simple
> master/slave protocol and should not be a problem to code. The hard time I
> am having is selecting a wireless chip that I can make to work with little
> RF knowledge and that I can buy easily in small quantities. Data speed is
> also not a big problem as I can live quite well with 19200 bps troughput.
>
>    So far the best option I have found is the Nordic NrF240L01.. Can you
> guys point me to some other inexpensive and easy to interface parts ?

Alexandre, after you settle on a solution, would you mind sharing? We may
have a similar requirement in the future.

2007\06\26@150221 by Dario Greggio

face picon face
Vitaliy wrote:

>>   So far the best option I have found is the Nordic NrF240L01.. Can you
>>guys point me to some other inexpensive and easy to interface parts ?
>
> Alexandre, after you settle on a solution, would you mind sharing? We may
> have a similar requirement in the future.

it *is* the best option :)))


--
Ciao, Dario

2007\06\26@170841 by alan smith

picon face
Have you looked at Micrel? They have a mesh solution as well.

---------------------------------
Don't get soaked.  Take a quick peak at the forecast
with theYahoo! Search weather shortcut.

2007\06\26@185232 by Alexandre Guimar„es

face picon face
Hi, Vitaliy

   I will surely share the final results...

   For now I discarded Cypress Wireless USB because of the right power
consumption and I am seriously considering Chipcon/TI CC2500 because it
works with no inductors ! You can just attach a folded dipole directly to
the part pins... The speed is great and the price is right also. It is also
available at many distributors and seems to be easy to source. it seems
mostly equivalent in functionality to nRF240L01 but would make the system
cost a little lower and sourcing small quantities seems easier....

   I am also considering Microchip MiWi and chipset as a option but I have
a while to make the final decision so I will wait for the Masters conference
in August to really decide about using MiWi or not...

Best regards,
Alexandre Guimaraes


{Original Message removed}

2007\06\26@213854 by Alexandre Guimar„es

face picon face
Hi,

   The offers from Chipcon/TI and Nordic have lower power consumption and
are easier to source for me, down in Brazil.. Thanks for the insight,
anyway.

Best regards,
Alexandre Guimaraes

----- Original Message -----
From: "alan smith" <.....micro_eng2KILLspamspam@spam@yahoo.com>
To: "Microcontroller discussion list - Public." <piclistspamKILLspammit.edu>
Sent: Tuesday, June 26, 2007 6:08 PM
Subject: Re: [EE] Wireless communication chip options.


> Have you looked at Micrel? They have a mesh solution as well.
>
> ---------------------------------
> Don't get soaked.  Take a quick peak at the forecast
> with theYahoo! Search weather shortcut.
> --

2007\06\27@045628 by Alan B. Pearce

face picon face
>For now I discarded Cypress Wireless USB because of the right power
>consumption and I am seriously considering Chipcon/TI CC2500 because
>it works with no inductors ! You can just attach a folded dipole
>directly to the part pins...

You may also like to look at the Analog Devices ADF7021 chip. It is designed
to work in all the short range unlicensed bands of Europe, USA, Japan and
China. I have no experience with it, but am intrigued enough to be thinking
of getting some samples for a possible project.

2007\06\27@074105 by Vasile Surducan

face picon face
On 6/27/07, Alan B. Pearce <.....A.B.PearceKILLspamspam.....rl.ac.uk> wrote:
> >For now I discarded Cypress Wireless USB because of the right power
> >consumption and I am seriously considering Chipcon/TI CC2500 because
> >it works with no inductors ! You can just attach a folded dipole
> >directly to the part pins...
>
> You may also like to look at the Analog Devices ADF7021 chip. It is designed
> to work in all the short range unlicensed bands of Europe, USA, Japan and
> China. I have no experience with it, but am intrigued enough to be thinking
> of getting some samples for a possible project.

I've ordered both ADF7012 and CC2500. CC2500 looks a little bit easy to use.
ADF7021 is different than ADF7012 but it has the same printed inductance for
setting the osc frequency.

Vasile


'[EE] Wireless communication chip options.'
2007\07\10@143140 by Shawn Wilton
picon face
Does anyone know of someone selling modules with the Microchip zigbee/miwi
solution?

Some ******** keep tagging the fences in our neighborhood, so I'm going to
tie some motion detectors to some wireless transceivers to try and scare
them away, or better yet, catch them in the act.

Either way I was considering going with the Sparkfun mirf modules, but
noticed xstream has their ZigBee modules priced at $20.  Not bad at all.
I'm also looking for something potentially ZigBee compatible to go with that
home automation system I'm never going to get around to designing.

Anyone know of a cheaper module?

Also, does anyone know of a cheap source for pyroelectric sensors?  These
are the sensors used in those IR motion sensors...

2007\07\10@150847 by David VanHorn

picon face
> I found myself very well with TRW-24 (nrf2401 based) from SparkFun. A
> little trouble at the beginning, but they worked very well and are cheap
> enough, and long-ranged too.

The docs could be clearer, but as long as you buy their boards and
don't try to wing it on your own with the RF design, it's fine.

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