EBC Exercise 35 Blynk

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thumb‎ Embedded Linux Class by Mark A. Yoder

Blynk is a simple way to control your BeagleBone from a device such as a cellphone.

Installing Blynk

To install Blynk, got to Getting Started with Blynk and follow the first two instructions for installing Blynk on your device and getting the Auth token.

Then on your Bone

bone$ sudo npm install -g --unsafe-perm onoff blynk-library

npm is a JavaScript package manager. Once loaded you can run the Blynk example.

bone$ cd exercises/iot/blynk
bone$ ./leds.js

Set up the Project

Now you need to build a project to talk to your Bone. Go to Getting Started With The Blynk App and follow the steps.

On step 3 (Choose Your Hardware) select Generic Board.

On Step 5 (Add a Widget) make your button attach to Virtual 0.

Run the project and when you tap the virtual button on your device, the USR3 LED should respond.

Add a Virtual LED

Add a virtual LED by doing the following.

  1. Stop your project by tapping the square in the upper right.
  2. Get a new Widget by tapping the + in the upper right.
  3. Scroll down to DISPLAYS and selecting LED.
  4. Tap the LED and connect it to Virtual pin V10.
  5. Hit the back arrow on the upper left.
  6. Hit the play triangle on the upper right.

Now when you click a button attached to P9_25, the virtual LED should toggle.

thumb‎ Embedded Linux Class by Mark A. Yoder