AT module and RN2483: not working with my Linux box

Thanks for using my breakouts :)

Two things I've done:

With digital 'scope, you can crank the scan speed WAY down and try to see if you can catch what it's doing.

Run serial lines to the RX of another adapter to listen to what's being sent. I have a contraption that uses a few '339's, and outputs the TX/RX lines each going into the Rx line of another connected serial adapter, and the Tx lines of those adapters let me inject text into each of the lines I'm probing (though this needs to be used with caution, because the 339 could be fighting an output).