What’s Nextion

Nextion is a Human Machine Interface (HMI) solution combining an onboard processor and memory touch display with Nextion Editor software for HMI GUI project development.

Using the Nextion Editor software, you can quickly develop the HMI GUI by drag-and-drop components (graphics, text, button, slider, etc.) and ASCII text-based instructions for coding how components interact on the display side.

Nextion HMI display connects to peripheral MCU via TTL Serial (5V, TX, RX, GND) to provide event notifications that peripheral MCU can act on, the peripheral MCU can easily update progress, and status back to Nextion display utilizing simple ASCII text-based instructions.

Our mission is to reduce the HMI development workloads.


Nextion Offers an Ease of Use and Cost-effective HMI Solution for You.


5 Years LTA

Nextion guarantees the availability of all Series products for a minimum of 5 years with CE and RoHS certification compliance. Unless you are specifically notified at the time of purchase, all Nextion series products will be available for 5 years at least since 2023. Here is our LTA announcement.


Versatile Screen Sizes

Nextion is available in various TFT LCD touchscreen sizes including 2.4”, 2.8”, 3.2”, 3.5”, 4.3”, 5.0”, 7.0”, 10.1” . With a large selection to choose from, one will likely fit your needs. Go Nextion Series and Product Datasheets.


Quick and Easy GUI

The Nextion Editor software offers an easy way to create the intuitive and superb touch user interface even for beginners. Add a static picture as background, define functions by components, you can make a simple GUI in minutes. The easy Drag-and-Drop components and simple ASCII text based instructions will dramatically reduce your HMI project development workloads.


Cost-effective HMI Solution

Easy-to-use components, touch event programming and customized GUI at screen side allow you to develop projects rapidly in cost-effective way. The TTL serial Nextion display is the best balance HMI solution between cost and benefit with low and decreased learning curve. See Nextion Editor Guide and Instruction Set.


Nextion Technical Support

Nextion technical support team offers a basic hardware technical service with prompt response through all time zones.

As for further enhanced technical assistance to your project, Enhanced Support is available for you.


User-Help-User Forum

You are never alone to develop your project. Join us in Nextion Community Forum where you can ask questions, share topics and advice with each other.

Note: The Nextion forum is only accessible for registered users.

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The Nextion MEGA IO project – Part 3

As at the beginning of every big project, things seem to advance slowly at the beginning. But if everything is well thought in advance and all the foundations well set, the speed of progress will increase afterwards as you'll see soon! After we defined a very compact an efficient protocol in Part 1 and started implementing it in a Nextion Demo project in Part 2, we need now the counterpart on the Arduino Mega side. That's our today's topic.

The Nextion MEGA IO project – Part 2

After we "invented" an extremely compact and efficient protocol in The Nextion MEGA IO project – Part 1, allowing to control up to 8 MCUs with their up to 12 PWM pins, 32 GPIO pins, and 16 ADC pins each (in case of the Arduino Mega) with only 3 bytes, it's now time to move from theory to practice! Our first goal was and is to make things better than in this project, where we used only 3 PWM channels and only a slightly reduced PWM resolution (7 instead of the theoretically possible 8 bits) for the sake of simplicity. Controlling a RGB LED this way limited the color resolution to 2 millions of colors instead of 16 millions as some attentive readers had noticed and reported back. Thus, we start a huge demo project today, with 12 sliders for the 12 PWM channels of the Arduino Mega, distributed over 2 screen pages, PWM1, and PWM2, having all the full 8bit range supported by the Arduino Mega.

The Nextion MEGA IO project – Part 1

As announced in my last Sunday's blog post, we'll start from this week with the Nextion MEGA IO project which will allow us from a simple Nextion HMI without onboard GPIO, to write all the 12 PWM pins, to read and write all the 32 digital IO pins, and to read all the 16 analog pins of an Arduino Mega! Later, we will even add the option to control the full IO not only of one single MEGA, but several of these. We will also get a downsized version for the Arduino Uno. With the knowledge and tools given successively in this blog post series, you should become a master when it comes to using any MCU for connecting various sensors, LEDs, motors, fans, pumps, relays, or whatever you might imagine!

Summer Sales reminder and the Mega I/O project

I have already blogged (for example here) about controlling Arduino's (or any other microcontroller's) I/O from a Nextion HMI with a simple and easy to understand custom protocol, not requiring a complex library. I had imagined that from the basic examples I gave, people would extend them for more functionalities. But from the feedback I received (you'll fin my email address at the end of this article), I learned that you, my dear readers, prefer apparently getting more elaborated ready-to-use solutions. Thus, instead of the previous approach which was bottom-up, we'll try now the top-down. That's why I started developing a huge new project, which explains my relative silence during the last two weeks. Curios? Please continue reading!

Nextion Summer Sales with huge discounts and a nifty HMI animation project

Blogging about the Nextion Summer Sales and the generous discounts alone did not seem to me to be enough to satisfy my dear readers. Thus, I thought this could be a nice occasion to do a simple animated demo project which would run on all series and not only on the Intelligent series with their extended animation support. I decided for the NX4832F035 from the Discovery series, but the HMI file (you'll find it as usual at the end of this article) can be compiled and uploaded on any Nextion HMI display having a 480x320 resolution, like the NX4832T035 or the NX4832K035, without any modification! Choosing a different screen size or resolution would require to rework the picture resources just a little.

Arduino PWM control from simple Nextion HMI

Three weeks ago, I published an article about simple serial communication from a Nextion HMI towards an Arduino, so that the latter could handle 25 buttons on a screen with only a handful of code lines. This was intended to show that for many simple use cases, there is often no need for using a complex library and the Nextion protocol with its variable message lengths and the famous 3 x 0xFF terminator. The week after, I went on, this time showing a simple event handler for the Arduino, so that it could process events auto-generated by the Nextion, just by enabling the "Send Component ID" case for all components. Since then, we were bound to the Nextion return data format, the Arduino side code was somewhat more complex but still shorter and simpler than using a library. Nevertheless, it seems that did not so much trigger the interest of you, my dear readers, the click rate was only about 60% of the article before. From which I conclude that you prefer simpler solutions... Lets get back to a more basic approach, allowing to simplify things by sending only two bytes, a command byte and a data byte, and make it fool- and accident-proof without a terminator sequence.

You may find out a Nextion Distributor in your country to purchase the Nextion products  from above search.
To be a Nextion Distributor, please submit an application form and we will reach you soon.


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