Welcome to our comprehensive Blink FAQ, designed for people who just heard about Blynk and want to know more about it. 🙂
First off: what is Blynk? In short, Blynk is an “Internet of Things” (IoT) platform that allows you to build your own apps to control certain devices over the internet. Blynk started off as a Kickstarter campaign in 2015, where it raised a total of 2,321 backers and raised $49,235 on a goal of just $10,000 (see the Kickstarter project here). Since then, the company has gained in popularity year-after-year. Here’s what Google Trends shows for Blynk search volume over the past 5 years in the USA:
Blynk may not be a household name just yet, but more and more people are hearing about it every day, and we believe this innovative company is just the beginning of what will be a huge IoT industry.
What is Blynk used for? Who uses it? And how do you use it?
Blynk has several different groups of users:
- Hobbyists and electronics geeks who just want to play around with this technology
- Individuals who want to make their life easier in some way by being able to control and monitor their Blynk-compatible devices through their phone
- Companies who want to launch their own commercial app based on Blynk
Let’s go through these. The first group (hobbyists) may own a device like a Raspberry Pi (basically a small single-board computer that you can tinker with) and want to build an app with Blynk to make their Raspberry Pi do something that can be controlled from your phone (the simplest example is lighting up an LED light on the Raspberry Pi with the tap of your finger on your phone, but you can do much more than that). Here’s how you get started with Blynk:
- Download the Blynk iOS or Android app
- Install a Blynk library for your Blynk-compatible device (the most popular Blynk library is this one, written in C++, but there are many other libraries allowing you to use your programming language of choice – here’s one for Python for example)
- Generate an Authentication Token from your Blynk app to connect your Blynk-compatible device
- Get started building your app. Within the Blynk app on your phone, you can add widgets (buttons, sliders etc.) to the new app you’re creating, and then using your Blynk library you got in step 2 you can write code on whatever your Blynk-compatible device is that tells the device what to do when someone interacts with the widgets on the phone app.
Roboindia gives a pretty good example tutorial on how to build the simplest possible Blynk app, namely one that lights up a light on your Raspberry Pi when you tap a button on your phone. Here’s what the final result looks like:
But Blynk can do much more than turn on a light. The second type of user group are people who want to do more than just experiment – they want to make something with Blynk that will actually help make their life better, and there are actually plenty of ways you can use Blynk for that. One example is building a smart home for yourself (see All About Circuit’s example, for example). You could build an app with Blynk that could notify you if your movement sensor detects movement, if your water tank level dips below a certain level, if a window or door is opened or if the alarm sounds.
The third user group of Blynk is companies. If you’re building a useful Blynk app like a smart home app, the key point is that only you can use it. You cannot make it a commercial app and distribute it to other people. If you’d like to do that, you have to pay Blynk a yearly fee, so certain companies (Blynk says they have worked with over 500 companies at the time of writing on their clients page) will have a Blynk app developed for their product(s) that’s useful to their customers, and pay Blynk to be able to offer the app to their customers.
So what’s our Blynk review – is it worth using? What’s its cost?
For individuals: Blynk has clearly established itself as the leading player for building IoT apps, so yes – if you’re interested in this area and have a compatible device you should absolutely download the app and give it a whirl. However, to enjoy it you should be reasonably technically literate and realize that building an actually useful app with Blynk will take many hours. Also, while the app’s free to download, if you’re going to be building a relatively complicated app with many widgets you’ll have to pay a little money. You start off with 2,000 “energy” and each widget you add will use some of your energy points. Here’s what energy points cost, if you need them:
- Pack of 1,000 Energy: $2.99
- Pack of 5,000 Energy: $6.99
- Pack of 13,000 Energy: $14.99
There are no monthly subscriptions or anything annoying like that with the Blynk app, and the above prices are very reasonable, so as an individual the cost to you will be little if anything. So we have no reservations at all about recommending that you try it out and start tinkering. Also, the vast majority of reviews on the App Store, Google Play store and Capterra are very positive.
For companies: Blynk’s plans for companies start at $1,990/year, and as you’d expect, we haven’t signed up to anything like that. We therefore can’t comment on the service Blynk provides to businesses.
What are some examples of cool Blynk projects?
We’ve mentioned the projects of turning on a light on your Raspberry Pi (the ‘hello world’ project of Blynk) and building a smart home setup, if you’re feeling adventurous. But there are actually loads of cool apps you could build with Blynk, limited only by your imagination (and hardware, of course). Here are some Blynk example projects:
- A thermostat controller that displays the current temperature and lets you change the temperature
- An Amazon echo controller (give voice commands through your phone)
- A smart garden app to monitor things like soil moisture and air temperature
- A system to water plants automatically
- A real-time air quality monitoring device
- A mailbox monitor
- A garage opener
Where can I find Blynk tutorials?
There is a great community for Blynk at https://community.blynk.cc who are happy to answer development questions if you’re confused (just read the documentation first); there is also a tutorials playlist on the official Blynk YouTube account. Currently, there are also a few cheap paid courses on Blynk development, such as one on how to make a robot car.
Are there any good Blynk alternatives?
Many big tech companies are trying to establish a foothold in the IoT industry. There is AWS IoT, Google Cloud IoT Core and IBM Watson IoT Platform, though we have not tried them ourselves as of now. Perhaps the closest product to Blynk is Cayenne who can perform many of the functions of Blynk (a good rundown of the differences between Blynk vs Cayenne is here).
What are some boards, shields and connections are currently compatible with Blynk?
Taken from the blynk.io website, the following boards are compatible with Blynk:
• Arduino Uno
• Arduino Mega
• Arduino Nano
• Arduino Mini
• Arduino YÚN (Bridge)
• Arduino Due
• Arduino 101
• Raspberry Pi
• Particle Core (ex Spark Core)
• Particle Photon
• SparkFun Blynk Board
• TinyDuino (CC3000)
• Wicked WildFire (CC3000)
Shields and connections:
• USB, connected to your laptop or desktop computer (no shield required!)
• Ethernet shield (W5100)
• Adafruit CC3000 WiFi
• Official Arduino WiFi shield
• HC-05, HC-06, HC-08, HM-10, etc.
The final word
If you’ve read this far, we recommend trying Blynk out – it’s a lot of fun and a great product. Also, if you have any comments, questions or feedback on this Blynk article, please comment below.
Here are the submissions we’ve received on Blynk, from people who have tried it:
I found Blynk to be one of the most outstanding platforms out there where you can join many pieces of software and hardware into a simple, easy to use interface. Yours or indeed my imagination is the limit.
As a DIY and tech enthusiast, these loves combined beautifully with Blynk! You can connect your Raspberry and almost any other development boards to an Android application. Anyone with some coding skills can use Python, C, or anything to create an interface.
I connected my central heating, aquarium and kettle to my phone. World domination is mine.
— Brett Downes, Haro Helpers
Blynk helped me to Integrate some impressive features in one of our projects at a record pace, all due to the use of the available widgets that really reduce the amount of code that needs to be written.
Blynk is a very powerful tool that we are going to encourage the team to get on board with. Our social media SAAS to clients can be ramped up to be even more helpful and thus increase customer satisfaction.
— Dustin Vann, Trusy Social
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