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Ravi Pujar
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Embedded systems engineer, Founder @Valetron Systems, Blogger @www.raviyp.com
 · DharwadIndia
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TUTORIAL

Arduino DTMF tutorial using SIM900/SIM800 modules - LIVE DEMO

Blog link: http://www.raviyp.com/embedded/232-arduino-dtmf-tutorial-using-sim900-sim800-modules-live-demo
This video demonstrates how you can use the built in DTMF detection feature on the SIM900 or SIM800 GSM modules using the AT+DDET command. Here you will learn, how you can send the AT commands and see how the module responds when buttons are pressed on Dial pad during a call. We wil also see how to write simple Arduino code to detect the DTMF commands and take action to control a device (LED)

Arduino
Arduino Uno
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