Arduino DTMF Shield
24 units available with a short lead time.
The Arduino DTMF Shield is a dual-tone multi-frequency decoder module that lets your Arduino interpret touch-tone signals from phones. Connect it to a GSM/GPRS shield and you can send commands to your Arduino via phone call — press buttons on your phone to control motors, lights, or any connected device remotely.
The shield features an audio connector for input, a speaker connector for audio monitoring, and a microphone connector for over-the-air reception. Combined with a GSM shield, it enables wireless command and control from any phone worldwide within GSM range.
Key Features
- DTMF Decoding – Decode touch-tone signals from landline or mobile phones
- Audio Input Jack – Connect to audio sources or GSM shields
- Speaker Connector – Monitor incoming audio signals
- Microphone Connector – Over-the-air DTMF reception (best with filtering)
- Arduino Shield Format – Stacks directly onto Arduino boards
Specifications
- Dimensions: 37×37×9mm
Ideal For
- Remote control via phone calls (with GSM shield)
- Telephone-activated automation systems
- DTMF-based security access codes
- Audio command decoding for robotics
Package Contents
- 1× DTMF decoder module
Resources
The Arduino DTMF Shield appears in the following collections:
