Published September 30, 2021 © GPL3+

LED Blink With Blynk 2.0

A tutorial for the new Blynk using the MKR 1000 connected over Wi-Fi.

IntermediateFull instructions provided12,133

Things used in this project

Hardware components

Arduino MKR IoT Bundle

Software apps and online services

Blynk

Story

Why

So I recently bought the arduino MKR 1000 IoT bundle, and all of the tutorials were for the old version of Blynk, which if you don't know, isn't supported anymore. Anyway, I had to figure it all out for myself, so in order to prevent you from having to do that, Here is what I hope to be a good tutorial for the new blynk :D.

Creating a New Template

By going to the website blynk.cloud,you can create a template. This template will then be used to create a new device. To create a new template first, press "new template" and select "arduino" for hardware and "wifi" for connection type. Name it whatever you want and then click the done button.

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Datastreams

So now we have a template, so now what do we want to send to our arduino to turn on and off an LED? We can use a datastream to send a high or low signal to the arduino, indicating wether we want the LED on or off. To create a datastream first, inside the template we just made, press the datastream tab. Then, press "new datastream" and click "virtual pin". By then changing a few settings as shown in the image below, you are done!

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Adding a new device

In order to connect to something, you need a new device. This device is based off of the template we just made. First, press "new device". Then, click "from template" and select the template we just made. And just like that you have your device ready to connect to!

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Connecting to the device from your phone

Now we are ready for the fun part: getting it to work. First, download the blynk app on appstore. Open up the app and login to your account. If you refresh your screen by swiping up, your new device should appear. Tap on your device and press the wrench icon up top. Then press the + icon and select "button". Double tap on the widget that popped up and arrange the settings as shown in the image below. Exit out of those screens and you should be left with a little button that you can press on and off.

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Uploading the code

Next is the easy part: uploading the code. By copying and pasting the code here into your arduino ide, you can get your LED blinking! VERYIMPORTANT: Make sure to enter your network name and password in correctly, as well as your Device name, Auth token and Template ID. These can be found on the Blynk console under device info. Be sure to connect up your circuit! (ledpin is 7)

Code

// Template ID, Device Name and Auth Token are provided by the Blynk.Cloud
// See the Device Info tab, or Template settings
#define BLYNK_TEMPLATE_ID "YOUR TEMPLATE ID"
#define BLYNK_DEVICE_NAME "YOUR DEVICE NAME"
#define BLYNK_AUTH_TOKEN "YOUR AUTH TOKEN"
// Comment this out to disable prints and save space
#define BLYNK_PRINT SerialUSB
#include <SPI.h>
#include <WiFi101.h>
#include <BlynkSimpleWiFiShield101.h>
char auth[] = BLYNK_AUTH_TOKEN;
// Your WiFi credentials.
// Set password to "" for open networks.
char ssid[] = "YOUR NETWORK NAME";
char pass[] = "YOUR NETWORK PASSWORD";
BlynkTimer timer;
// This function is called every time the Virtual Pin 0 state changes
BLYNK_WRITE(V0){
 int pinValue = param.asInt();
 digitalWrite(7, pinValue);
}
// This function is called every time the device is connected to the Blynk.Cloud
BLYNK_CONNECTED()
{
 // Change Web Link Button message to "Congratulations!"
 Blynk.setProperty(V3, "offImageUrl", "https://static-image.nyc3.cdn.digitaloceanspaces.com/general/fte/congratulations.png");
 Blynk.setProperty(V3, "onImageUrl",  "https://static-image.nyc3.cdn.digitaloceanspaces.com/general/fte/congratulations_pressed.png");
 Blynk.setProperty(V3, "url", "https://docs.blynk.io/en/getting-started/what-do-i-need-to-blynk/how-quickstart-device-was-made");
}
// This function sends Arduino's uptime every second to Virtual Pin 2.
void setup()
{
 // Debug console
 SerialUSB.begin(115200);
 Blynk.begin(auth, ssid, pass);
 // You can also specify server:
 //Blynk.begin(auth, ssid, pass, "blynk.cloud", 80);
 //Blynk.begin(auth, ssid, pass, IPAddress(192,168,1,100), 8080);
 pinMode(7, OUTPUT);
 // Setup a function to be called every second
}
void loop()
{
 Blynk.run();
 timer.run();
 // You can inject your own code or combine it with other sketches.
 // Check other examples on how to communicate with Blynk. Remember
 // to avoid delay() function!
}