{"title":"Arduino DTMF Shield","handle":"arduino-dtmf-shield","url":"/products/arduino-dtmf-shield","description":"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.\n\nThe 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.\n\nKey Features\n\n\nDTMF Decoding – Decode touch-tone signals from landline or mobile phones\n\nAudio Input Jack – Connect to audio sources or GSM shields\n\nSpeaker Connector – Monitor incoming audio signals\n\nMicrophone Connector – Over-the-air DTMF reception (best with filtering)\n\nArduino Shield Format – Stacks directly onto Arduino boards\n\n\nSpecifications\n\n\nDimensions: 37×37×9mm\n\n\nIdeal For\n\nRemote control via phone calls (with GSM shield)\nTelephone-activated automation systems\nDTMF-based security access codes\nAudio command decoding for robotics\n\n\nPackage Contents\n\n1× DTMF decoder module\n\n\n\nNote: For use with a GSM/GPS/GPRS shield, a 3.5mm audio cable (sold separately) is required to connect the shields.\n\n\nResources\n\nWiki Documentation & Tutorial\nArduino Library & Examples (ZIP)\n","vendor":"DFRobot","product_type":"physical","in_stock":true,"options":[],"variants":[{"id":11743,"title":"Default Title","sku":"DF-DFR0308","price":26.58,"on_sale":false,"in_stock":true,"available_quantity":22,"option1":"Default Title"}]}