Thanks!
I soldered them now but is showing the same exception again. With Grommet library first tells that a problem occurred with hardware, please check it says. But at the end both libraries finish with the exception I attach. Now the shield is correctly powered and looks like when is connected to arduino.
The code near the exception is all my xbee class code; maybe you can find a mistake.
Thanks again for your help.
Sorry but I tried to not use any library and use my serial communication class and looks it works fine, I only have a problem with parsing bytes to string, and I think the problem comes from the transmitter because is an arduino and not a PC serial com.
So my question is why there’re two libraries for xBee? What are they for?
Thanks.