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Practical Arduino Engineering by Harold Timmis

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C H A P T E R  9

Error Messages and Commands: Using GSM Technology with Your Arduino

In this chapter, we’ll be using attention (AT) commands to send text messages to your phone when a particular condition is met. The first two projects will give you an understanding of the GSM protocol and how to configure the Cellular Shield to send text messages. The AT commands that we will be using are AT+CMGF and AT+CMGS, which will always begin with AT and end with a carriage return. (For more information on the AT command set go to www.sparkfun.com/datasheets/CellularShield/SM5100B%20AT%20Command%20Set.pdf.)

These preliminary projects cover sending a simple text message and a door alarm with text alerts. Once these are completed, we will move on to the ...

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