Long Range Arduino Based Walkie Talkie using nRF24L01
He graduated from WUT in Poland and invented the Walkie-Talkie in America / Business - Innovations - Technology (BIT of WUT) / Research / Home - Warsaw University of Technology
how walkie talkie works? - Knowledge
DIY Walkie Talkie: A Complete Step-by-Step Guide
GitHub - atomic14/esp32-walkie-talkie: A Walkie-Talkie based around the ESP32 using UDP broadcast or ESP-NOW