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 ...

You can even turn the humble handheld device into a working walkie talkie. The build relies on adding a SA868 transceiver module to the ESPBoy, along with a microphone, speaker, audio amplifier ...

Lay said there is typically one walkie talkie for every seat in each of the department’s fire trucks. They also store some in their stations in the event the Bartholomew County Emergency ...