Cool, thanks for that info. Yeah, I have found the GPRSbee to be pretty good; we have four of them that have been operating for over a year now and they all just keep trucking along.
It’s strange, I do also have an XBee3 (XB3M1, XB3-C-A2-UT-001 RevH) but have never been able to get it to power up or respond in any way on the Mayfly. I have SJ13 soldered to LiPo and am certain I have the pins right but can’t get it to wake up, using either the transparent or bypass constructors, or even just by setting the pins and trying to wake it up directly. I guess I could open a new thread for that one 🙂