Arduino IoT Cloud lesson 3: Push button

Step 1: Requirements

1X Arduino Nano 33 IoT

1X breadboard

3X jumper wires

1X Push Button

1X 10K Resistance

Arduino Build

Step 2: Setup Arduino Create

For the project we create a new “Thing”. You can also use one of the “Thing” s from the previous lessons. But to keep everything clear, we are creating a new “Thing” for this project. In this project we have called the ”Thing” Arduino-IoT-Lesson-3-Push Button. When the thing is created we add a property. The property in this case is a Push button. For type we go for the boolean again, but the permission must be read only. We do this because we want to read the physical push button.

Now that we have made the property, we are going to build and wire the circuit.

Step 2: Building and Wiring

Step 3: Programming

 We program the Arduino in the same way as in the previous lessons. The code you will use for this is below. If you want to learn it better, type the code instead of copying and pasting it. You will learn to program better.

Once you have written the code you can upload it to the Arduino. If this is successful, go back to the IoT Cloud, click on dashboard† If it's right it will say "False". As soon as you press the button, it changes to “True”.

#include "thingProperties.h"
#define BUTTON_PIN 5
int btnState; // this code remembers the button status (whether it is on or off)
int btnPrevState = 0; // we use this code so that the button remains true even if we release the button
void setup () {
Serial.begin (9600);
delay (1500);
pinMode (BUTTON_PIN, INPUT);
initProperties ();
ArduinoCloud.begin(ArduinoIoTPreferredConnection);
setDebugMessageLevel (2);
ArduinoCloud.printDebugInfo ();
}
void loop () {
ArduinoCloud.update ();
btnState = digitalRead (BUTTON_PIN);
if (btnPrevState == 0 && btnState == 1) {// if the prevstate is 0 then it is false and if the buttonstate is 1 then it is true.
push button =! push button; //! push button means the button is turned on
}
btnPrevState = btnState;
}