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This article deconstructs the binary serial control protocol of the DMR858M module in depth. It analyzes its data frame structure, checksum calculation method, and provides a complete command code reference table. Mastering this protocol is key to implementing module function control and parameter configuration, laying the foundation for subsequent firmware development.

This article details how to integrate the DMR858M module with the ESP32 hardware. It focuses on the key challenges of power supply design, especially how to handle high transient currents to avoid system reboots. Detailed interface logic instructions (UART, PTT, audio) and a proven pin mapping reference are provided to help developers quickly build a stable and reliable hardware prototype.

Get an in-depth look at the DMR858M module, a highly integrated 5W DMR digital walkie-talkie core. This article details its key advantages, such as powerful long-range communication and an onboard AMBE++ vocoder, which solves compatibility issues in open-source projects. An interpretation of key technical specifications provides a solid technical foundation for developers to evaluate the module's feasibility in the early stages of a project.

The solution consists of the SA356-TX transmitter module and the SA326-RX receiver module, supporting a high sampling rate of 48 kHz and latency of less than 3 ms. It features a simple installation and connection method, making it suitable for a variety of wireless audio application scenarios.

The LoRa1121 is a wireless communication module compatible with both SUB-GHz and 2.4GHz frequency bands, offering users a more flexible and comprehensive solution by combining the advantages of both. In application scenarios requiring long-range coverage, low power consumption, and strong penetration, the SUB-GHz frequency band excels. Meanwhile, in applications needing high data transmission rates and global compatibility, the 2.4GHz frequency band provides strong support.