How to connect Blynk IoT mobile app

Table of Contents
How to connect Blynk IoT mobile app

Simply connect your TOWER kit to your mobile phone. Once paired, you can send notifications or view graphs of the temperature in your home. You need the Blynk IoT app to do this and in this article we'll show you how.

Start by registering on

The first step is to create an account on the Blynk app. You need a new account even if you have used a previous version of the app.

Open in your browser and click Create new account. Then fill in your email and a message will be sent to you with a link to create a password.

Blynk IoT - new account

Create a template - template

You can skip the introductory tutorial and save it for later.

Select Templates in the left menu and click + Create template on the right. Fill in the name of the template in the form, the hardware and connection type you choose does not matter now. Click the Done button to finish creating the template.

Blynk IoT - new account Blynk IoT - new account

Add data streams

For each value you want to write to Blynk, you need to create a data stream. In this manual we will use the same principle as in the previous version of Blynk - virtual pins.

On the open page of the created template, click on Datastreams in the menu. After clicking on the + New Datastream button, select the Virtual Pin option.

Blynk IoT - new datastream

Fill in the datastream name, color, assign it a number (each datastream will have a unique number), select the datatype, and if necessary, the unit and other parameters. Click Create to finish adding.

If you want to add more datastreams, repeat the same procedure.

Create a device from the template

Navigate to the home page of Blynk by clicking on the magnifying glass on the left. Click the + New Device button to open the window to create a new device.

Blynk IoT - new device

In the creation method selection, choose From template. In the next form, select your template and assign a name to the device. Click Create to complete the process.

Blynk IoT - new device

Notice that you have a notification on the right with information about the new device. They contain information about TEMPLATE ID and AUTH TOKEN, both of which you will need to load in Playground in a moment.

Blynk IoT - new device

Move to Playground

For a functional connection, we recommend updating Playground to the latest version, it includes the pre-installed Blynk IoT plugin (node-red-contrib-blynk-iot). Alternatively, install this plugin.

In the Functions tab, find the nodes that work with the new version of Blynk - they are marked with the Blynk IoT section.

  1. Select the write node to write values to the datastream you created.
Blynk IoT - HARDWARIO Playground
  1. Double click to get to its settings.
  2. Right click on the small pencil, click to open a new window. In the Url field, enter, in the Auth Token and Template ID fields, copy the values from the device details in the web application on your computer.
Blynk IoT - HARDWARIO Playground
  1. Confirm the settings by clicking Add.
  2. Fill in the Virtual Pin number of your datastream and click Done to save everything.

Now you can set up your flow in Node-RED. For example, it may look as simple as this.

Blynk IoT - HARDWARIO Playground

Set up your mobile app

You can download the Blynk IoT app from the App store or Google Play. Log in with your details.

Blynk IoT mobile dashboard

Right on the home page you will see the device you created.

Blynk IoT mobile dashboard

Open it by clicking and set up your dashboard:

  1. Under the key on the top right you will find the dashboard setup page.


} Blynk IoT mobile dashboard

  1. Use the + button , or click somewhere on the desktop to add a new widget. In the demo we use Labeled Value.
Blynk IoT mobile dashboard
  1. Press the added widget to display its settings window. The most important thing is to add the Datastream from your template for the selected Virtual Pin.
Blynk IoT mobile dashboard
  1. You're done. Your widget in the Blynk IoT app will now start saving the data sent from Playground.