DTMF的PDF说明文件，从原理到应用方法进行了详尽的叙述，使人理解双音多频的概念和使用方法-DTMF PDF Document from the application of the principle carried out a detailed narrative that people understand DTMF the concept and use

设计了一个模拟智能家居系统，该系统以STC单片机作为控制核心，利用双音多频信号作为远距离的通信信号，利用串口进行模块内部的通信。文章详细介绍了系统的组成、工作原理及其软硬件设计。- The paper designs a system which simulates the intelligent home system. The system takes STC MCU as the control core, uses the DTMF signals as the long-distanc

根据数字正弦波振荡器原理，产生高频信号采样序列和低频信号采样序列，相加合成DTMF，并发送-According to the principle of digital sine wave oscillator, a high-frequency signal sampling sequence and low-frequency signal sample sequence, the sum of the synthesis of the DTMF and sends