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I'd like to buy one XBee Pro with Wire Antenna, and another with an u.fl connector. The problem is that, on the only website I can buy them, the U.Fl one costs 20 € less than the one with a Wire Antenna: I wish I could keep these 20 bucks.

On the other hand, I've already got two unused XBee with Wire Antenna: I wonder whether I could unsolder the U.Fl connector of one XBee Pro, and instead solder the wire antenna of one unused XBee.

So, Could I just replace an U.Fl connector with a Wire Antenna ? Won't this lower the range ? Are the XBee w/ ufl connector different from XBee w/ wire antenna, except for the antenna/connector ?

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The main consideration here is the frequency of operation - if the unused XBee and the one with the U.FL connection operate at the same frequency, you'll be fine. It won't make an appreciable difference whether you attach a U.FL antenna or if you solder the other wire antenna on.

See here for a similar answer.

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  • \$\begingroup\$ And should I unsolder the U.FL connector after soldering the new wire antenna ? \$\endgroup\$ – Spirine Jun 10 '15 at 14:28
  • \$\begingroup\$ It might be easier to unsolder the connector first, then solder the wire antenna to where the connector used to be \$\endgroup\$ – crocboy Jun 10 '15 at 14:30

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