I'm trying to connect two XBee S1 units. One is on a Sparkfun Explorer USB and the other is mounted on an Arduino Uno board and plugged into the PC by USB. If I am looking at the one on the Explorer in XTCU, I can see the other XBee but when I try to connect i get an error from XTCU saying 'Could not Initialize device'.
I have used the setup found on an XBee Setup Tutorial (https://spin.atomicobject.com/2016/07/18/xbee-tutorial/).
Any thoughts on what might be missing here? This is my first try with XBees. I'm trying to do a project from Exploring Arduino (Chapter 11) where they are using the XBees but can't get them to talk to each other. Any help would be appreciated!!