On a related note, I haven't yet checked the voltages on the breakout board when it is powered from +5V. I got slightly lost trying to grok their schematic to see what voltage it was actually supplying to the WT32i. No guarantee they got it right.

The bluetooth module wants 3.3V, but it wasn't clear to me if the breakout board was respecting that limit or not. I plan to power my own breakout board with 3.3V from the Arduino initially, and from the empeg itself eventually. This may require changing one of the "jumpers" on the breakout board. TBD.

Cheers