In the ESP32 module the built-in DAC and ADC are used for audio in and output, which provide just about enough resolution for voice communication. So why use ESP-NOW rather than WiFi or Bluetooth?

For more details on the SuperB Bee-compatible ESP32 module jump over to the Crowd Supply website by following the link below where it is available to purchase from $23 with free shipping ...

Adafruit has announced the availability of the ESP32-S2 WROOM Module with PCB Antenna equipped with 4 MB flash and available to purchase priced at just ...