ESP_NOW Demo

Use PlatformIO to load this onto a LilyGO T-Watch 2020 V1 to demonstrate the ESP_NOW functionality.

References:

• https://github.com/Xinyuan-LilyGO/TTGO_TWatch_Library
• https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/network/esp_now.html