Building Custom ESP32 Walkie-Talkies with the DMR858M: A Hands-On Guide

The DMR858M module is a highly integrated Digital Mobile Radio (DMR) subsystem with up to 5W of transmit power. It is not just an RF transceiver but a complete solution, internally integrating a digital walkie-talkie chip, an RF power amplifier, and an audio amplifier. This design allows developers to control a full-featured walkie talkie core.