The short version of my dive into Arduino-esp32 is that there’s a lot here, even though it’s not done yet. Blinking LEDs and other simple GPIO is a given, and the core communication libraries ...

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?

Espressif Systems has just started mass production of the ESP32-C5 RISC-V wireless microcontroller with dual-band (2.4/5 GHz) ...

Then, an Arduino board might be exactly what ... The R4 WiFi is already equipped with Wi-Fi communication, thanks to the onboard ESP32-S3 module, which the Rev3 lacks. The R4 WiFi's Wi-Fi feature ...