Ruben,

Yes we have, MRF24J40MA will be plan B. The big difference is cost, for the =

two sides you need $20, vs. about $6 for the MRF49XA (this includes the cos=
t =

of passives + PCB + building the module, but not FCC certification).

We may end up using both, but saving $14 per device is very tantalizing and =

for the particular application we have in mind, range can be sacrificed (15 =

ft LOS would be plenty) and communication is point-to-point (not mesh).

Please remember to share your experience with the MRF24J40MA once you get =

around to playing with it. :)

Vitaliy


----- Original Message ----- =

From: "Ruben J=F6nsson" <ruben@pp.sbbs.se>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Wednesday, February 03, 2010 01:36
Subject: Re: [EE] Wireless with the MRF49XA


Have you looked at the MRF24J40MA module for the 2.4GHz ISM band?

Complete module with integrated pcb antenna and matching circuit, crystal =

and
voltage regulator for less than 10$. FCC, IC and ETSI compliant and with
regulatory approvals for modular devices.

<http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=3DMRF24J4=
0MA-
I/RM-ND>

Range is up to 400m (outside, line of sight according to the datasheet).

Can be used with microchips zigbee or miwi (p2p) stack.

I have not used it yet but am planning to do some experiments for a wireless
"intelligent home network" that initially uses temperature sensors and =

switches
to do in-house room to room heating management.

/Ruben


> http://www.microchip.com/wwwproducts/Devices.aspx?dDocName=3Den541404
>
> Has anyone done a project with this chip?
>
> It looks insanely cheap for the performance you get, I'm trying to
> understand what the catch is. What is the (approximate) range?
>
> Vitaliy
>
> -- =

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Ruben J=F6nsson
AB Liros Electronic
Box 9124, 200 39 Malm=F6, Sweden
TEL INT +46 40142078
FAX INT +46 40947388
ruben@pp.sbbs.se
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