Chapter 5. Opening a Lock with an SMS
In this chapter, we are going to build another great application for secret agents: opening a door lock simply by sending an SMS! You'll just need to send a message to a given number and then you'll be able to control a door lock or any other kind of on/off digital device, such as an alarm.
For that, we are going to take a number of steps, as follows:
- First, we are going to use Arduino and the FONA shield from Adafruit in order to be able to receive and process text messages
- Then, we'll connect this to a relay and LED to see whether we can actually control a device by sending an SMS
- Finally, we'll see how to connect an actual electronic lock to the system
Let's start!
Hardware and software requirements
First, let's ...
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