Yes, the code explorer is open to the right of the screen. The debug button turns orange suggesting it is active and it says "waiting for data" at the bottom right hand corner of the screen. All of the variables remain zero in value and there does not appear to be any activity from either URF or ERF in terms of data transfer. I have an LED from from DTR to ground via a 10k resistor, so I can see that there is no data activity from the ERF. I can calibrate an analogue sensor wirelessly perfectly fine, and only after I have closed the calibration wizard does the debug work.