We've handled outputs, but what makes robots truly interesting is the use of inputs to generate outputs! In this chapter, we'll go over basic input devices, such as buttons, and environmental sensors, such as a sensor that detects ambient light. We'll talk about how Johnny-Five uses events to make these devices easy to use, and build some projects. After finishing this chapter, you should have all the knowledge that you need to handle most input/output projects.
This chapter will cover the following topics:
How analog input pins work
Johnny-Five's sensor events
Using basic inputs – buttons and potentiometers
Using sensors – light and temperature
Other types of sensors and their uses