Chapter 7. Retrieving Data from the Real World with Sensors

In this chapter, we will work with a variety of sensors to retrieve data from the real world. We will cover the following topics:

• Understanding sensors and their connection types

• Learn the most important things we must consider when choosing sensors

• Take advantage of the upm library with many different sensors

• Measure the magnitude and direction of proper acceleration or g-force with an accelerometer

• Work with a three axis analog accelerometer

• Use a digital accelerometer that works with the I²C bus

• Work with the mraa library and the I²C bus to control a digital accelerometer

• Measure ambient temperature with an analog sensor

• Use a digital temperature and humidity sensor that works with the I²C bus