Dash Button

Application name : dash_button

Overview

The Dash Button sample application is a simple application which is sending data to the cloud. This example requires additional hardware setup to work properly: a push button and an LED need to be connected to the arduino board. The following table shows the necessary connections.

Hardware Connections

Hardware

Pin

Logic

Button

D2

Active LOW

LED

D3

Active HIGH

For more information about the hardware connection, refer the Wiring Diagram With Additional Component.

The working principles of this application are the following: it sends data to the cloud at every button presses. To achieve this task, it is using an event. This is the way to send data from the device to the cloud. To get more information about the Embever IoT Messaging, take a look at the Embever IoT Messaging topic.

Flashing

Uploading this application to an Arduino compatible board is easy: navigate to the examples and select the dash_button from the Embever IoT library in Arduino IDE. Upload the sketch to the board and see the result in the serial terminal.

Testing the Application

To test the application, the necessary hardware connections should be done (as mentioned before). After powering up the device, the following information should appear in the serial terminal:

DashButton demo starting...

Send an event to the cloud by pressing the external button. The external LED will light up for 15 seconds.

To verify the event which is just sent, go to the cloud system and check the events. Should look like the following:

{
    "type": "buttonPressed",
    "payload": {
        "name": "1"
    }
}

To continue experimenting with the sample application, press the external button several times. A possible upgrade for this application is to add and implement more external triggers (like buttons) and change the name value according to the trigger source.