In a recent article in Elektor magazine, [Clemens Valens] describes the construction and software for an ESP32 walkie-talkie ... The DIY Walkie-Talkie circuit diagram. (Credit: Clemens Valens ...

It’s an ESP32 with two antennas ... According to the block diagram, the twin antennas are not used simultaneously but offer diversity one at a time. There is also 8GB 8 MB of flash, double ...