Is it possible to configure the XBEE 868 Pro to serve instead of the ARF board. With the 350mw power that should give suitable range probably at least 20km even with a 1/4 wave vertical air/air.
I think that module has been declared EOL according to the Digi website ... "EOL in Progress – Product is not for new design. Please refer to XBee RF Modules for our latest products."
Whatever it is it's a critical part for PAW, I only hope it's fully certified module with decent supplier support. The added benefit of these is the suppliers can very easily tweak them for the different standards & frequencies used around the world - that makes it easy for PAW to be used, legally, virtually anywhere.
There are many alternatives, even fully certified and supported modules are under £30 each from companies that design and make them as their core business.
