I have a strange problem. I have a number of XBee S1 devices (standard and pro) and a number of explorer and breakout boards for easier connection. My setup was working fine until about a week when I wanted to switch out a standard S1 with a Pro. After connecting to XCTU, my devices will now only transmit when connected to regulated explorer breakout boards (eg. Sparkfun USB Explorer or Regulated breakout board). I thought this may have been an issue with power, but I have a power supply and can confirm that the XBees are being powered properly. Even if I attach 3.3v directly to the XBee pins, nothing is transmitted. But, if I run the power through a regulated breakout board, all is fine. Does anyone know what would cause this issue? Why would it have worked before, and not now? I am on the latest firmware, and have tested with various XBees, power supplies, and breakout boards. All exhibit the same behaviour.
I am officially out of hypotheses. Any help is greatly appreciated!