This component is ideally suited to adding dual tone multi frequency (DTMF) decoding to your project. This detection module interprets the incoming tone and produces a coded output that can be connected to all manner of microcontrollers.

Features:

• DTMF V1 is a dual tone multi-frequency decoding encoding module.
• Received code process: 3.5MM audio interface converts the received audio signal into a dual-tone multi-frequency code, Converted to ASCII code sent through the serial port. Input and output can be connected together by audio cable in this Module.
• Code transmitting process: Module receives the serial port input ASCII code, Then converted to DTMF code,And then converted to an audio signal sent via 3.5MM audio interface.