Can I determine which of my two XBee modules is bad?

I'm not easily offended :slight_smile:

But I was concerned that perhaps you felt there was something amiss with the writeup. I'll admit that using XBees for wireless programming is an unconventional way to use them, which can easily add to my difficulty in detecting problems, especially for a "newbe" like me.

Thanks for taking the time to respond to my query, you have been helpful.