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a gsm modem or a mobile phone with data interface(usb/rs232) , knowledge about the AT command set (since the phone will look like a modem from the data transfer port), An application running on a microcontroller(ASM) or PC(VB/VC/...) communicating with the phone. And the inerface with this control unit to the devices u want to controlbalajik said:Can somebody explain on how to control an appliance (to do simple project) by sending SMS from a mobile phone device ?
What are the requirements for the end device (hardware and how also to program it) ?