I would be very surprised if someone implemented a BT4 device which wasn't backward compatible with BT3. I thought that backward compatibility with BT3 was a requirement of BT4 or something.

My guess is that it's more likely that my Arduino software is simply not setting the right thingys for it to pair correctly. I was suspicious that I wasn't necessarily doing all the right things in that procedure. I'll bet if you poke at the docs and the commands enough you'll find the secret.

This is why I wanted to test it on more devices. :-)
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Tony Fabris