Build a mobile app to receive and act on commands from a caller using DTMF and SMS based on a menu of operations that are turned on/off by the app owner. Example, caller calls his mobile phone and send a code followed by #. His mobile then instructs IFTTT (if this then that app) to do the operation specified by the code exmaple to turn on the AC.
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Hi I would like to get in depth of technical aspect of this application involving commands from caller.And as per your example turn on the AC as per if this then that.