Control an Arduino With Your Phone





Introduction: Control an Arduino With Your Phone

Hello everyone! In this instructible I will show you how to control and read sensors with arduino and blynk. Blynk is an app that allows full control over arduino, rasberry pi and spark core. With your smartphone! And it is as easy as uploading some code.

Step 1: Materials

You will need:

1 arduino (any model)

1 usb cable/ethernet shield

A computer and smartphone

Step 2: Download the App

Go to the app store / google play store on your phone and download blynk, then create a blynk acount.

Step 3: Configure the App

Once you have the app installed. Take some time to plan out your control layout. Think of your goal and arrange the controls accordingly. In my case it was a bbq thermometer so I added two analog gauges.

Once you have your layout setup, configure the ports.

IMPORTANT: make note of the api key shown in the project settings in the blynk app.

Step 4: Upload the Code

Install the blynk library into your arduino IDE like any other arduino library:

And open the sketch that matches your hardware, in my case it was usb serial.


You can also just click the codebender link amd upload it directly from your browser!

IMPORTANT: paste that api key from earlier into the code where it says "api key"

Step 5: See the Action!

Open your app and plug in a sensor/led to your arduino and watch the magic of blynk!

Note: if you are not using an ethernet shield then you have to keep the usb cable plugged into the computer



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    Have you configured your Ethernet shield to work with blynk?

    Hello dear Blynkers !

    I've got a problem that's when i want to start cntrolling via Blynk they said your Arduino UNO is not in network i have Arduino UNO REV3 , Arduiono Ethernet Shield !
    please i need your supports to solve the problem !
    Kind regards

    i got this " your arduino UNO is not in network". how can i solve it?

    This is good.

    I have been searching some application references in which WIZnet solution is applied, and found your project using Ethernet Shield.

    In the Ethernet Shield WIZnet's W5100 chip is embedded.

    If you are O.K. I'd like to post this article in WIZnet Museum ( for others.

    Thanks! go right ahead, just give me credit.

    how to unlock the phone pattern

    Tried everything and it seems to be not working with USB connection. I used the Arduino_Serial_USB sketch and it compiled. Followed the manual and installed a button widget. Copied the authorisation code and compiled and pressed play on my phone after placing the LED connected to PIN7 on the board and set button to control pin7 on phone. App says Arduino Uno offline. :(

    please read this

    Oops sorry for the bad grammer, stupid phone keyboard

    Yeah I wouldn't use this for final products yet either but if your just tinkering and want an easy way to do stuff, another bonus is that it is all hosted on their servers for free! That was you can use it anywhere in the world where you have internet. And believe me, this is much different than a Microsoft product (and it's free)