Promiscuous scanners

[2bndy5]

Satisfies #852 and resolves #714

I've been re-basing this branch for almost 2 years. With the fix from #952 (& #954), I'm finally ready to get these scanner updates into master.

New Examples

• examples/scannerGraphic uses either a ST7789 based display or a SSD1306 based display. Recommended display hardware (what it was tested with):
  • ST7789 240x135 (the sketch default) aka SPI_DISPLAY in code
  • SSD1306 128x64 aka I2C_DISPLAY in code
• examples_linux/ncurses/scanner_ncurses.cpp requires libncurses5-dev installed. Only builds with CMake.

Modified Examples

• examples_linux/scanner.py uses python's std lib binding to curses lib (which ships with most Linux distros, even RPi OS lite)
• examples_linux/scanner.cpp still uses only stdout (no ncurses) with improvements implemented in the other scanner examples
• examples_pico/scanner.cpp still uses only stdout (no ncurses) with improvements implemented in the other scanner examples

[2bndy5]

Finished testing the new scannerGraphic Arduino example on both the I2C and SPI displays that I have lying around (product links in OP). FYI, the ST7789 seems to be slightly faster.

I think the only thing left to review is to make sure the code is consistent for assessing the noise detection; specifically

• pipe addresses
• calling testRPD() before and after stopListening()
• ensure available() is called after stopListening()

outdated suggestion

[TMRh20]

This was obviously a pile of work!
I tested what I can, but don't have any displays to test the graphic example and wasn't able to test the pico example.

[2bndy5]

I tested the scanner graphic pretty well. I'm happy with it as is. There might be contributors in the future to improve it further, but for now I just wanted it be a simple scanner display. There's little usability in that example because it can't tell you which exact channels were detecting noise; there just isn't enough room on those small displays to show active channels' number.

It would make for a neat idea in a cosplay Star Trek TNG tricorder device... 🤓

I did test all other examples' modifications too.