Ian KD8CEC, in his third article on using a second arduino with the µBITx, demonstrates the signal scope feature made possible with having a dedicated ardunio nano connected to the main Raduino control processor via i2c lines.
The signal scope shows a section of the band surrounding the currently tuned frequency IN REAL TIME. The nano and the serial connections to the Nextion doesn’t have the agility to provide a full blown waterfall display, but a real time display of signals around where you are currently tuned is still pretty impressive.
The other feature that is present in the Nextion display version of this arduino add-on, is a CW decode function.
Bring on the release of v1.097 of CEC firmware!