DTMF Shield for Arduino

The DTMF Shield for Arduino allows your development board to decode dual-tone multi-frequency signals from telephone keypads and external audio sources. It suits students, hobbyists, and makers developing interactive voice response setups, remote switching mechanisms, or audio-driven projects.

DTMF signal decoding

This shield decodes standard dual-tone multi-frequency signals on Arduino platforms. It translates frequency pairs into recognisable data inputs to trigger actions on your microcontroller.

Telephone keypad control

The module captures telephone keypad signals for remote device management. It allows you to build remote control systems using standard dial tones over telephone or audio channels.

Dedicated audio jack interface

An integrated audio jack provides direct line-in connectivity to phones and audio devices. This ensures clean tone transmission into the decoding hardware for dependable signal detection.

Speaker and microphone connections

Equipped with speaker and microphone interfaces, the board facilitates two-way audio routing. It provides the essential hardware connections required for processing remote audio commands and outputting sound.

Downloads & documentation

• Product wiki (DFRobot)
• library and example