ESP32 Support

[breakingspell]

Hello! A few changes are needed to build and run this project on ESP32.

• WiFi library

  • Fails to build without it

• Init cc1101 with ESP32 pinout declared

  • The default init causes a boot loop, as a restricted pin is pulled.
  • Several issues on the upstream repo and Arduino forums reference the ESP32 pinout, and passing the exact pins to the library before init (example).
    • Simply declaring and setting the pins allowed the board and radio to initialize, wiring is the same as the reference.
    • Added the standard cc1101 init check (it correctly reports if the wiring is wrong)

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The data pins (both SPI and interrupt) can be set to any open GPIO on ESP32. For instance, I use the following pinout on a D1 mini:

  #define RX_PIN 36
  #define TX_PIN 5
  #define SCK_PIN 19
  #define SS_PIN 23
  #define MISO_PIN 26
  #define MOSI_PIN 18