>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. 

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