Make Voice Call using Arduino

This sketch connects a voice call from your GSM shield and Arduino to a remote phone number entered through the serial monitor. You'll need to attach a speaker and microphone to hear the connected phone and send your voice.   First, import the GSM library #include <GSM.h> SIM cards may have a PIN number that unlocks their functionality. Define the PIN for your SIM. If your SIM has no PIN, you can ...

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