Hello.... i am using an xbee shield with uno and i have pins problem. i need to connect figerprint device to the arduino pin 2,3 but the xbee shield is on the top of arduino and i cant connect the pins properly. there are also some o/p pins on the xbee shield and i wonder what is that for? if you guys help me how to connect the fingerprint to pin 2 ,3. all other visible pins of arduino are already in use. here is the picture
First thing you gotta do is make sure that the XBee shield isn't using those pins for a function.
If they are...then you'll have to put your finger print device on some other pins . Why do you need pins 2 and 3 specifically? You have pins 8-13 free.