I have three XBee Adapter kits and three XBee Pro S2B's. Using your excellent instructions I soldered the three adapter kits then set up two of the XBee's one coordinator one router. The coordinator is plugged into the computer through a USB adapter and the router is plugged into an UNO using the Adafruit adapter kit. I am able to get the Xbee's talking back and forth just fine. I am using the same XBee module on all three adapters for the router. One adapter does not turn on but the Arduino terminal sometimes shows hex data that is not transmitted to the coordinated. The second adapter works for about ten minutes sending data back and forth then turns off. The third seems to work fine. I have checked the solder points to make sure no shorts. By using the same XBee it should not be an XBee setting. What am I doing wrong.