Building Arduino Projects for the Internet of Things

CHAPTER 4 ■ COMPLEX FLOWS: NODE-RED

Learning Objectives

At the end of this chapter, you will be able to:

• Read light sensor data from Arduino


• Build a Node-RED flow that receives an HTTP request and tweets
  a message


• Send sensor data in an HTTP request to start a Node-RED flow

Hardware Required

Figure  4-3 provides a list of all hardware components required for building the light
sensor tweet system.

Figure 4-3. Hardware required for light sensor tweet system