GSM module sketch

In this section, we will write the basic Arduino sketch for interacting with the GSM module. The following sketch has been written to dial a phone number as well as to send a text message via SMS.

The following sketch can be downloaded from the online location mentioned in the Chapter 1, Boot Camp of this book:

 // Include the software serial library // Alternately you can directly use the hardware serial // via (Arduino's digital pins D0 and D1) #include <SoftwareSerial.h>  // Define the two pins that will be connected // between the Arduino Uno and the GSM module  // D2 is connected to RXD pin of the GSM module // So D2 will be simulated as the Tx pin on the Arduino #define SIM800_RXD 2  // D4 is connected to TXD pin of ...

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