Can I read DTMF Tones in Arduino Projects on EtoBox?

DTMF Tones in Arduino Projects by Mika Mikic is a document available to read on EtoBox.

What is DTMF Tones in Arduino Projects about?

This document summarizes an Arduino project that allows interfacing with telephone landlines to send and receive DTMF tones. It describes using a Direct Access Arrangement module for a legal and robust connection, along with Holtek chips for DTMF tone generation and reception. An I2C GPIO chip is also used to reduce the interface pins needed on the Arduino. Code examples and schematics are provided to allow controlling phone calls and receiving key presses from a called phone.

Author

Mika Mikic

Language

EN