In this chapter, we will be doing three projects. The first project will be a simple serial communication project that will send a text to and from the Arduino through the Bluetooth radio. We will also show how to configure the Bluetooth radio in the first project. For the second project, we will show how to toggle a LED on and off remotely. For the final project, we will build a mini weather station, which will enable us to read the temperature remotely through the Bluetooth radio. Each project will have its own wiring diagram included with it; however, if you wish to connect all of the hardware at once, the following diagram shows how everything is connected:
This diagram may initially look complex compared to earlier diagrams; however, if we break it down into three parts, it really is not that complex. The first part is the DHT-11 temperature sensor, which...