Their earliest draft of an ESP32 module, called the ESP3212, has been scrapped and replaced with the ESP-32S, with a pinout that’s identical to Espressif’s WROOM32, according to [Angus Gratton ...
In a recent article in Elektor magazine, [Clemens Valens] describes the construction and software for an ESP32 walkie-talkie system that uses ESP-NOW for the wireless connection between units ...