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[Reply #15 on:]

When used wifi..the gain antenna is the problem.
used arduino with ethernet shield or wifi shield should OK.

J

[Reply #16 on:]

Code:

Which kind of 900 MHz and 868 Mhz radio are you talking about?

I'm referring to the ones from Digi, the XBee-Pro for 868 MHz version and XBee-Pro XSC for 900 MHz. For LOS, the 868 can reach 40 km with adequate antenna gain. Sparkfun carries them.