1. Add a Second Button and Set Point

2. Add a second button
Wire an additional button on the main breadboard and connect it to input 31 on the Arduino
Note that this time the wiring is reversed. Both the first method and this one are valid configurations

3. Second Button Picture

4. Introducing the Set Point
Our chamber will be assigned a set point which is a temperature we wish to maintain within
This is analogous to setting the thermostat in your house
We want to be able to increase and decrease the value of this set point using the two buttons on our breadboard
It is also necessary to display this value on the LCD screen

5. Button Behavior
There are a variety of behaviors that can be programmed for the buttons. How would you want your buttons to behave?
One method is to have each button press increment the set point value one step. This is shown in Example Code 1.
What if you want to be able to hold down the button to rapidly change the set point? How would you do this? Example Code 2 shows a simple way to do this.
Try coming up with your own method for controlling the button.

6. LCD Display Picture