DFR DTMF DECODER SHIELD

This Shield is a Dual-Tone Multi-Frequency signaling module decoder for Arduino With it's audio connector you can decode the crazy funny noises common phones make. If you are not sure what I'm talking about, imagine a home phone while pressing several of its keys. These Touch-Tones have a specific frequency or sound that this module can decode. This Shield is a Audio code system that will allow you to send commands to your Arduino via Audio signal.

Together with GMS / GPRS / GPS shield this module can communicate your Arduino with any phone land line or Cell phone in the world, within GSM signal range. Which goes as far as your cellphone.

• Applications :
  • Its quite convenient to send wireless commands over audio lines, like a phone call. Connected to our GSM/GPS shield, you could just call your robot and press any button or set of buttons to enable it.
  • Connect DFRobot mp3 module to this board to enable audio feedback when pressing keys, or a welcome message when the phone call is established.
  • Enable GPS Geo location mapping, and DTMF moving functions to have a GSM wireless networking remote controlled robot.
  • For use with the GSM / GPS / GPRS shield, you will need an audio cable.
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• Audio Socket for Application
• Dimensions : 37x37x9mm
• Speaker Connector for Audio Sound checking.
• Microphone Connector for over the air remote control system (note : due to environmental noise, without any filtering system this method is not recommended)