connecting tft lcd touch screen with nodemcu esp8266 free sample

The ILI9341 TFT module contains a display controller with the same name: ILI9341. It’s a color display that uses SPI interface protocol and requires 4 or 5 control pins, it’s low cost and easy to use.

The resolution of this TFT display is 240 x 320 which means it has 76800 pixels. This module works with 3.3V only and it doesn’t support 5V (not 5V tolerant).

The ILI9341 TFT display board which is shown in project circuit diagram has 14 pins, the first 9 pins are for the display and the other 5 pins are for the touch module.

Pins D5 (GPIO14) and D7 (GPIO13) are hardware SPI module pins of the ESP8266EX microcontroller respectively for SCK (serial clock) and MOSI (master-out slave-in).

The first library is a driver for the ILI9341 TFT display which can be installed from Arduino IDE library manager (Sketch —> Include Library —> Manage Libraries …, in the search box write “ili9341” and choose the one from Adafruit).

The ILI9341 TFT display is connected to NodeMCU hardware SPI module pins (clock and data), the other pins which are: CS (chip select), RST (reset) and DC (data/command) are defined as shown below:

Full Arduino code:The following Arduino code is from Adafruit ILI9341 library (graphicstest.ino) with some modifications in order to work with the above circuit diagram.

The ST7789 TFT module contains a display controller with the same name: ST7789. It’s a color display that uses SPI interface protocol and requires 3, 4 or 5 control pins, it’s low cost and easy to use.

This display is an IPS display, it comes in different sizes (1.3″, 1.54″ …) but all of them should have the same resolution of 240×240 pixel, this means it has 57600 pixels. This module works with 3.3V only and it doesn’t support 5V.

Pins D5 (GPIO14) and D7 (GPIO13) are hardware SPI module pins of the ESP8266EX microcontroller respectively for SCK (serial clock) and MOSI (master-out slave-in).

The first library is a driver for the ST7789 TFT display which can be installed from Arduino IDE library manager (Sketch —> Include Library —> Manage Libraries …, in the search box write “st7789” and install the one from Adafruit).

Simply put: that TFT requires a lot of GPIO pins - 10 at an absolute bare minimum, but better if you have more available. The ESP8266 doesn"t have many IO pins - and some of them are very sensitive about what they can be connected to without affecting the boot process.

If you are careful with your GPIO selection it may be possible to work with that screen. There are no specific requirements for what pins need to be connected to where (as far as hardware functionality goes), so it"s up to you to find the right combination that doesn"t cripple the boot process (stay away from GPIOs 0, 2 and 15 if you can).

In the previous article (“WiFi OLED Mini Weather Station with ESP8266“) I have used the OLED kit from https://blog.squix.org. And as promised, this time it is about the “ESP8266 WiFi Color Display Kit”:

I had ordered both because I thought that the Color Display kit is needs the other kit as a base. Well, it turned out that both kits work independently. My bad. Actually this is good, as I have now two independent ESP8266 weather stations :-). An addition to that, they can exchange data (e.g. temperature/humidity) with a server, so that makes them a perfect dual weather station.

This time assembling the kit needs basic soldering skills. With the excellent tutorial by Daniel Eichhorn  (https://blog.squix.org/wifi-color-display-kit) this should be a piece of cake. The only consideration is what kind of headers to use. I opted for the ‘larger but flexible’ approach. That way I can separate the boards if needed.

Example code is available on GitHub (https://github.com/squix78/esp8266-weather-station-color). The code is very well documented I had no issues to make all the needed configuration (WiFi SSID and connection settings). After a few  hours I had the ESP8266 weather station up and running in the first prototype of the enclosure:

After a few hours, I have now my second ESP8266 WiFi weather station with touch LCD. It is not looking good and I very much enjoy it. The design is available on Thingiverse (https://www.thingiverse.com/thing:2527282).

As you all know the are a few variants of the 1.8" TFT on the internet. With the genuine Adafruit lcd-s there are usually no problems. But when using fake ones(usually from Aliexpress) you have to make some adjustments.

Bodmers TFT_eSPI library is very awsome and rich funcionality. And the best part is that he made it to handle the pixel offsets depending on wich kind of 1.8" TFT you are using.

Then uncomment the tft height an width. And then in my case(REDTAB) uncomment for eg: #define ST7735_REDTAB. After this save it for the moment and compile sketch and upload to board. To be sure i have defined the parameters in the sketch too.This is a bit long procedure, cause you have to compile and upload the sketch every time to board untill the offset is gone, but it is worth the experimenting. For editing the h. files i strongly suggest Wordpad. Images included.

The capability to read from an ST7789V TFT with a single bidirectional SDA pin has been added. At the moment this ONLY works with an ESP32. It is enabled with a #define TFT_SDA_READ in the setup file.

An Arduino IDE compatible graphics and fonts library for ESP8266 and ESP32 processors with drivers for ILI9341, ILI9163, ST7735, S6D02A1, ILI9481, ILI9486, ILI9488, HX8357D and ST7789 based TFT displays that support SPI. The library can be loaded using the Arduino IDE"s Library Manager.

The library supports TFT displays designed for the Raspberry Pi that are based on a ILI9486 driver chip with a 480 x 320 pixel screen. This display must be of the Waveshare design and use a 16 bit serial interface based on the 74HC04, 74HC4040 and 2 x 74HC4094 logic chips. A modification to these displays is possible (see mod image in Tools folder) to make many graphics functions much faster (e.g. 23ms to clear the screen, 1.2ms to draw a 72 pixel high numeral).

Some displays permit the internal TFT screen RAM to be read. The library supports reading from ILI9341, ST7789 and ILI9488 SPI displays for the ESP32 and ESP8266. The 8 bit parallel displays used with the ESP32 can usually can be read too. The TFT_Screen_Capture example allows full screens to be captured and sent to a PC, this is handy to create program documentation.

The library includes a "Sprite" class, this enables flicker free updates of complex graphics. Direct writes to the TFT with graphics functions are still available, so existing sketches do not need to be changed.

A Sprite is notionally an invisible graphics screen that is kept in the processors RAM. Graphics can be drawn into the Sprite just as they can be drawn directly to the screen. Once the Sprite is completed it can be plotted onto the screen in any position. If there is sufficient RAM then the Sprite can be the same size as the screen and used as a frame buffer. Sprites by default use 16 bit colours, the bit depth can be set to 8 bits (256 colours) , or 1 bit (any 2 colours) to reduce the RAM needed. On an ESP8266 the largest 16 bit colour Sprite that can be created is about 160x128 pixels, this consumes 40Kbytes of RAM. On an ESP32 the workspace RAM is more limited than the datsheet implies so a 16 bit colour Sprite is limited to about 200x200 pixels (~80Kbytes), an 8 bit sprite to 320x240 pixels (~76kbytes). A 1 bit per pixel Sprite requires only 9600 bytes for a full 320 x 240 screen buffer, this is ideal for supporting use with 2 colour bitmap fonts.

One or more sprites can be created, a sprite can be any pixel width and height, limited only by available RAM. The RAM needed for a 16 bit colour depth Sprite is (2 x width x height) bytes, for a Sprite with 8 bit colour depth the RAM needed is (width x height) bytes. Sprites can be created and deleted dynamically as needed in the sketch, this means RAM can be freed up after the Sprite has been plotted on the screen, more RAM intensive WiFi based code can then be run and normal graphics operations still work.

Drawing graphics into a sprite is very fast, for those familiar with the Adafruit "graphicstest" example, this whole test completes in 18ms in a 160x128 sprite. Examples of sprite use can be found in the "examples/Sprite" folder.

If an ESP32 board has SPIRAM (i.e. PSRAM) fitted then Sprites will use the PSRAM memory and large full screen buffer Sprites can be created. Full screen Sprites take longer to render (~45ms for a 320 x 240 16 bit Sprite), so bear that in mind.

The XPT2046 touch screen controller is supported. The SPI bus for the touch controller is shared with the TFT and only an additional chip select line is needed.

The library supports SPI overlap on the ESP8266 so the TFT screen can share MOSI, MISO and SCLK pins with the program FLASH, this frees up GPIO pins for other uses.

The library contains proportional fonts, different sizes can be enabled/disabled at compile time to optimise the use of FLASH memory. Anti-alased (smooth) font files in vlw format stored in SPIFFS are supported. Any 16 bit Unicode character can be included and rendered, this means many language specific characters can be rendered to the screen.

The library is based on the Adafruit GFX and Adafruit driver libraries and the aim is to retain compatibility. Significant additions have been made to the library to boost the speed for ESP8266/ESP32 processors (it is typically 3 to 10 times faster) and to add new features. The new graphics functions include different size proportional fonts and formatting features. There are lots of example sketches to demonstrate the different features and included functions.

Configuration of the library font selections, pins used to interface with the TFT and other features is made by editting the User_Setup.h file in the library folder, or by selecting your own configuration in the "User_Setup_Selet,h" file. Fonts and features can easily be enabled/disabled by commenting out lines.

Anti-aliased (smooth) font files in "vlw" format are generated by the free Processing IDE using a sketch included in the library Tools folder. This sketch with the Processing IDE can be used to generate font files from your computer"s font set or any TrueType (.ttf) font, the font file can include any combination of 16 bit Unicode characters. This means Greek, Japanese and any other UCS-2 glyphs can be used. Character arrays and Strings in UTF-8 format are supported.

Unfortunately the typical UNO/mcufriend TFT display board maps LCD_RD, LCD_CS and LCD_RST signals to the ESP32 analogue pins 35, 34 and 36 which are input only. To solve this I linked in the 3 spare pins IO15, IO33 and IO32 by adding wires to the bottom of the board as follows:

If the display board is fitted with a resistance based touch screen then this can be used by performing the modifications described here and the fork of the Adafruit library:

The library was intended to support only TFT displays but using a Sprite as a 1 bit per pixel screen buffer permits support for the Waveshare 2 and 3 colour SPI ePaper displays. This addition to the library is experimental and only one example is provided. Further examples will be added.

// https://www.aliexpress.com/store/product/3-2-TFT-LCD-Display-module-Touch-Screen-Shield-board-onboard-temperature-sensor-w-Touch-Pen/1199788_32755473754.html?spm=2114.12010615.0.0.bXDdc3

// https://www.aliexpress.com/store/product/OPEN-SMART-5V-3-3V-Compatible-UNO-R3-CH340G-ATMEGA328P-Development-Board-with-USB-Cable-for/1199788_32758607490.html?spm=2114.12010615.0.0.ckMTaN

//#define ILI9488_DRIVER // WARNING: Do not connect ILI9488 display SDO to MISO if other devices share the SPI bus (TFT SDO does NOT tristate when CS is high)

In this guide we’re going to show you how you can use the 1.8 TFT display with the Arduino. You’ll learn how to wire the display, write text, draw shapes and display images on the screen.

The 1.8 TFT is a colorful display with 128 x 160 color pixels. The display can load images from an SD card – it has an SD card slot at the back. The following figure shows the screen front and back view.

This module uses SPI communication – see the wiring below . To control the display we’ll use the TFT library, which is already included with Arduino IDE 1.0.5 and later.

The TFT display communicates with the Arduino via SPI communication, so you need to include the SPI library on your code. We also use the TFT library to write and draw on the display.

In which “Hello, World!” is the text you want to display and the (x, y) coordinate is the location where you want to start display text on the screen.

The 1.8 TFT display can load images from the SD card. To read from the SD card you use the SD library, already included in the Arduino IDE software. Follow the next steps to display an image on the display:

Note: some people find issues with this display when trying to read from the SD card. We don’t know why that happens. In fact, we tested a couple of times and it worked well, and then, when we were about to record to show you the final result, the display didn’t recognized the SD card anymore – we’re not sure if it’s a problem with the SD card holder that doesn’t establish a proper connection with the SD card. However, we are sure these instructions work, because we’ve tested them.

In this guide we’ve shown you how to use the 1.8 TFT display with the Arduino: display text, draw shapes and display images. You can easily add a nice visual interface to your projects using this display.

New to the ESP8266? Start here! The ESP8266 is a Wi-Fi System on a Chip (SoC) produced by Espressif Systems. It’s great for IoT and Home Automation projects. This article is a getting started guide for the ESP8266 development board.

New to the ESP8266? You’re in the right place. This guide contains all the information you need to get started with this amazing board. Learn what is an ESP8266, what is it used for, how to choose an ESP8266 development board, how to upload your first program, and much more.

It can be used as a standalone device, or as a UART to Wi-Fi adaptor to allow other microcontrollers to connect to a Wi-Fi network. For example, you can connect an ESP8266 to an Arduino to add Wi-Fi capabilities to your Arduino board. The most practical application is using it as a standalone device.

With the ESP8266, you can control inputs and outputs as you would do with an Arduino, but with Wi-Fi capabilities. This means you can bring your projects online, which is great for home automation and internet of things applications. Why is the ESP8266 so popular? Mainly for the following reasons:

Low-power: the ESP8266 consumes very little power when compared with other microcontrollers and can even go into deep sleepmode to consume less power;

Wi-Fi: the ESP8266 can generate its own Wi-Fi network (access point) or connect to other Wi-Fi networks (station) to get access to the internet. This means the ESP8266 can access online services to make HTTP requests or save data to the cloud, for example. It can also act as a web server so that you can access it using a web browser and be able to control and monitor your boards remotely.

Compatible with the Arduino “programming language”: those that are already familiar with programming the Arduino board, were happy to know that they can program the ESP8266 in the Arduino style.

Compatible with MicroPython: you can program the ESP8266 with MicroPython firmware, which is a re-implementation of Python 3 targeted for microcontrollers and embedded systems.

There is a successor of the ESP8266—the ESP32. The ESP32 combines Wi-Fi and Bluetooth and is dual-core. If you want to start with any of these boards, we recommend getting an ESP32. If you already have an ESP8266, don’t worry. It works great, it has a huge community and it does the job for most DIY IoT projects.

There are several versions of the ESP8266 modules as shown in the picture below. The ESP-01 and ESP-12E are the most popular versions. You’ll find a wide variety of development boards with ESP-12E or ESP-12F chips.

These come with all the needed circuitry to apply power, upload code, easy access to the GPIOs to connect sensors and actuators, an antenna for the Wi-Fi signal, and other useful features.

There is a wide variety of ESP8266 boards from different vendors. While they all work in a similar way, some boards may be more suitable for some projects than others. When looking for an ESP8266 development board there are several aspects you need to take into account:

USB-to-UART interface and voltage regulator circuit. Most full-featured development boards have these two features. This is important to easily connect the ESP8266 to your computer to upload code and apply power.

Pin configuration and the number of pins. To properly use the ESP8266 in your projects, you need to have access to the board pinout (like a map that shows which pin corresponds to which GPIO and its features). So make sure you have access to the pinout of the board you’re getting. Additionally, some boards have more accessible GPIOs than others. That’s a factor you should take into account depending on your project features.

Size. There is a wide variety of ESP8266 development boards with different sizes. Some boards benefit from a small form factor, which might be very practical depending on your project features. Usually, smaller boards have a small number of available GPIOs like the ESP-01.

Antenna connector. Most boards come with an onboard antenna for the Wi-Fi signal. Some boards come with an antenna connector to optionally connect an external antenna. Adding an external antenna increases your Wi-Fi range.

The best ESP8266 development board for your project will depend on what you intend to do. If you’re just getting started with the ESP8266 board, we recommend using theESP8266-12E NodeMCU Kit.

The ESP12-E NodeMCU Kit is one of the most used ESP8266 development boards. It features 4MB of flash memory, access to 11 GPIO pins, and one analog-to-digital converter (ADC) pin with 10-bit resolution. In addition, the board has a built-in voltage regulator, and you can power up the module using the mini USB socket or the Vin pin.

Uploading code to the board is as easy as uploading code to the Arduino. There’s no need for an FTDI programmer or extra circuitry, as it has a built-in USB-to-serial converter. Most boards come with the CP2101 or CH340 chips.

It comes with an onboard antenna for Wi-Fi signal, and comes with RST and FLASH buttons to reset the board and put it into flashing mode. There is a blue LED internally connected to GPIO 2, which is very practical for debugging.

This is the ESP8266 board model we use more often in our Wi-Fi and IoT projects. It is very versatile, and it’s great for beginners. So, if this is your first time with the ESP8266, this is the module we recommend: ESP8266 12-E NodeMCU Kit.

The ESP-01 is super small and fits in any enclosure, so it’s perfect for finished projects. However, it is very limited in the number of accessible GPIOs and doesn’t have a built-in voltage regulator, so you need to use a 3V3 power source or add a voltage regulator to drop the input voltage to 3V3. Additionally, it doesn’t come with a USB-to-serial converter, which means you need an FTDI programmer or a specific programmer board to upload code.

The WeMos D1 Mini offers 4MB flash memory, 11GPIOs, and 1 ADC pin in a minimal and small setup. The community has developed a wide variety of shields for the D1 mini board, which allows you to build small and simple setups with almost no wiring required. You just need to stack the shields to connect multiple peripherals. It comes with a built-in voltage regulator and USB-to-UART converter, which makes it easy to upload code. For these reasons, this might also be a good choice for beginners.

There are many other versions of different ESP8266 boards. Most boards work in a similar way. Just make sure they are suitable for your project requirements.

The most widely used ESP8266 NodeMCU development boards are the ESP8266-12E NodeMCU Kit, the Wemos D1 Mini, and the ESP-01. We’ll show you the pinout for those boards. A pinout is like a map that shows which pin corresponds to which GPIO and its features. This way, you should know which GPIOs to use if you need to use SPI, I2C, ADC, or others.

If you get a different board, you should be able to find its pinout with a quick google search. Here we’ll just take a quick look at the pinout. We recommend reading the following article that shows a detailed explanation of the ESP8266 pinout and how to use its GPIOs: ESP8266 Pinout Reference: Which GPIO pins should you use?

Usually, all boards come with power pins: 3V3, GND, and VIN. You can use these pins to power the board (if you’re not providing power through the USB port), or to get power for other peripherals (if you’re powering the board using the USB port).

One important thing to notice about the ESP8266 is that the GPIO number doesn’t match the label on the board silkscreen. For example, D0 corresponds to GPIO16 and D1 corresponds to GPIO5. When programming your boards using Arduino IDE, you must use the GPIO number and not the number on the silkscreen. This applies to most ESP8266 boards.

Different ESP8266 GPIOs have specific features, so you must choose the pins for your projects wisely. Otherwise, you may end up getting unexpected results.

We recommend taking a look at our ESP8266 GPIO guide which shows in great detail the function of each GPIO and how to pick the best GPIOs for your project:

There are many different ways to program the ESP8266 using different programming languages: Arduino C/C++ using the Arduino core for the ESP32, Micropython, LUA, and others.

Our preferred method is programming the ESP8266 using the “Arduino programming language” with Arduino IDE or VS Code. For beginners, we recommend getting started with Arduino IDE.

To program your boards, you need an IDE to write your code. For beginners, we recommend using Arduino IDE. While it’s not the best IDE, it works well and is simple and intuitive to use for beginners. After getting familiar with Arduino IDE and you start creating more complex projects, you may find it useful to use VS Code with the PlatformIO extension instead.

If you’re just getting started with the ESP8266, start with Arduino IDE. At the time of writing this tutorial, we recommend using the legacy version (1.8.19) with the ESP8266. While version 2 works well with Arduino, there are still some bugs and some features that are not supported yet for the ESP8266.

Don’t install the 2.0 version. At the time of writing this tutorial, we recommend using the legacy version (1.8.19) with the ESP8266. While version 2 works well with Arduino, there are still some bugs and some features that are not supported yet for the ESP8266.

In the Arduino IDE, you can find multiple examples for the ESP8266 board. First, make sure you have an ESP8266 board selected in Tools> Board. Then, simply go to File> Examplesand check out the examples under the ESP8266 section.

You just need to go to Tools > Board > Boards Manager, search for ESP8266, and check the version that you have installed. If there is a more recent version available, select that version to install it.

First, make sure you have an ESP8266 selected in Tools> Board. If you’re using the ESP8266-12E NodeMCU Kit as shown in previous pictures, select the NodeMCU 1.0 (ESP-12E Module) option. If you don’t know what’s your board, you can always select the Generic ESP8266 Module.

Warning: you must use a USB cable with data wires. Some USB cables from chargers or power banks are power only and they don’t transfer data—these won’t work.

1)Go to Tools > Board, scroll down to the ESP8266 section and select your ESP8266 board. If you don’t know what’s your board, the Generic ESP8266 Module usually works fine for most boards.

After connecting the ESP8266 board to your computer, if the COM port in Arduino IDE is grayed out, it means you don’t have the required USB drivers installed on your computer.

If you want to build your own IoT and Home Automation projects with the ESP8266 boards and need some help getting started, we have the best resources for you.

Home Automation with the ESP8266: this is our premium ESP8266 eBook. Learn how to use the ESP8266 to automate your house. Even if you are an absolute beginner, you’ll be able to follow along and come up with your own IoT projects.

We hope you’ve found this getting started guide useful. I think we’ve included all the required information for you to get started. You learned what is an ESP8266, how to choose an ESP8266 development board, and how to upload new code to the ESP8266 using Arduino IDE.

Nice packaging comes with more tham you need to build your weather station. Only thing that was missing was a piece of paper with reference to documentation, which is to be found on the Internets.

What you’ll build in less that 20 minutes of soldering is a device, that (with demo sketch for Arduino IDE) is able to connect to your WiFi and fetch current WeatherStation data for pre-defined location. On first start, it will require to calibrate touch display used to control the device.

Which gives a real brainkick when you realize you have SD card, touch screen, free serial port and you could easily add GSM module (without additional memory requirements) and possibly some additional I2C device(s) attached.

Even though it might not be visible at first sight, there’s a tremendous amount of work behind this thing (and by ‘thing’ is meant a combination of software and hardware). When you start installing the sample Weather Station sketch, it appears that you need to install some libraries, all of them by Daniel Eichhorn: ESP8266 WeatherStation which is a WeatherUnderground client, Json Streaming Parser that helps keeping low memory profile while getting huge API responses, and Mini Grafx library that implements a VSYNC equivalent through framebuffer for embedded devices.

The Arduino sketch has 438k built so there’s still plenty of room to add more features. However, I’m looking to dive deeply into existing example code in order to reuse as much as possible. There’s NNTP, visual WiFi display, display carousel, icons, fonts, colours and last but not least the touch screen support.

In this Arduino touch screen tutorial we will learn how to use TFT LCD Touch Screen with Arduino. You can watch the following video or read the written tutorial below.

For this tutorial I composed three examples. The first example is distance measurement using ultrasonic sensor. The output from the sensor, or the distance is printed on the screen and using the touch screen we can select the units, either centimeters or inches.

The next example is controlling an RGB LED using these three RGB sliders. For example if we start to slide the blue slider, the LED will light up in blue and increase the light as we would go to the maximum value. So the sliders can move from 0 to 255 and with their combination we can set any color to the RGB LED,  but just keep in mind that the LED cannot represent the colors that much accurate.

The third example is a game. Actually it’s a replica of the popular Flappy Bird game for smartphones. We can play the game using the push button or even using the touch screen itself.

As an example I am using a 3.2” TFT Touch Screen in a combination with a TFT LCD Arduino Mega Shield. We need a shield because the TFT Touch screen works at 3.3V and the Arduino Mega outputs are 5 V. For the first example I have the HC-SR04 ultrasonic sensor, then for the second example an RGB LED with three resistors and a push button for the game example. Also I had to make a custom made pin header like this, by soldering pin headers and bend on of them so I could insert them in between the Arduino Board and the TFT Shield.

Here’s the circuit schematic. We will use the GND pin, the digital pins from 8 to 13, as well as the pin number 14. As the 5V pins are already used by the TFT Screen I will use the pin number 13 as VCC, by setting it right away high in the setup section of code.

As the code is a bit longer and for better understanding I will post the source code of the program in sections with description for each section. And at the end of this article I will post the complete source code.

I will use the UTFT and URTouch libraries made by Henning Karlsen. Here I would like to say thanks to him for the incredible work he has done. The libraries enable really easy use of the TFT Screens, and they work with many different TFT screens sizes, shields and controllers. You can download these libraries from his website, RinkyDinkElectronics.com and also find a lot of demo examples and detailed documentation of how to use them.

After we include the libraries we need to create UTFT and URTouch objects. The parameters of these objects depends on the model of the TFT Screen and Shield and these details can be also found in the documentation of the libraries.

Next we need to define the fonts that are coming with the libraries and also define some variables needed for the program. In the setup section we need to initiate the screen and the touch, define the pin modes for the connected sensor, the led and the button, and initially call the drawHomeSreen() custom function, which will draw the home screen of the program.

So now I will explain how we can make the home screen of the program. With the setBackColor() function we need to set the background color of the text, black one in our case. Then we need to set the color to white, set the big font and using the print() function, we will print the string “Arduino TFT Tutorial” at the center of the screen and 10 pixels  down the Y – Axis of the screen. Next we will set the color to red and draw the red line below the text. After that we need to set the color back to white, and print the two other strings, “by HowToMechatronics.com” using the small font and “Select Example” using the big font.

Next is the distance sensor button. First we need to set the color and then using the fillRoundRect() function we will draw the rounded rectangle. Then we will set the color back to white and using the drawRoundRect() function we will draw another rounded rectangle on top of the previous one, but this one will be without a fill so the overall appearance of the button looks like it has a frame. On top of the button we will print the text using the big font and the same background color as the fill of the button. The same procedure goes for the two other buttons.

Now we need to make the buttons functional so that when we press them they would send us to the appropriate example. In the setup section we set the character ‘0’ to the currentPage variable, which will indicate that we are at the home screen. So if that’s true, and if we press on the screen this if statement would become true and using these lines here we will get the X and Y coordinates where the screen has been pressed. If that’s the area that covers the first button we will call the drawDistanceSensor() custom function which will activate the distance sensor example. Also we will set the character ‘1’ to the variable currentPage which will indicate that we are at the first example. The drawFrame() custom function is used for highlighting the button when it’s pressed. The same procedure goes for the two other buttons.

So the drawDistanceSensor() custom function needs to be called only once when the button is pressed in order to draw all the graphics of this example in similar way as we described for the home screen. However, the getDistance() custom function needs to be called repeatedly in order to print the latest results of the distance measured by the sensor.

Here’s that function which uses the ultrasonic sensor to calculate the distance and print the values with SevenSegNum font in green color, either in centimeters or inches. If you need more details how the ultrasonic sensor works you can check my particular tutorialfor that. Back in the loop section we can see what happens when we press the select unit buttons as well as the back button.

Ok next is the RGB LED Control example. If we press the second button, the drawLedControl() custom function will be called only once for drawing the graphic of that example and the setLedColor() custom function will be repeatedly called. In this function we use the touch screen to set the values of the 3 sliders from 0 to 255. With the if statements we confine the area of each slider and get the X value of the slider. So the values of the X coordinate of each slider are from 38 to 310 pixels and we need to map these values into values from 0 to 255 which will be used as a PWM signal for lighting up the LED. If you need more details how the RGB LED works you can check my particular tutorialfor that. The rest of the code in this custom function is for drawing the sliders. Back in the loop section we only have the back button which also turns off the LED when pressed.

In order the code to work and compile you will have to include an addition “.c” file in the same directory with the Arduino sketch. This file is for the third game example and it’s a bitmap of the bird. For more details how this part of the code work  you can check my particular tutorial. Here you can download that file:

Arduino has always helped to build projects easily and make them look more attractive.  Programming an LCD screen with touch screen option might sound as a complicated task, but the Arduino libraries and shields had made it really easy. In this project we will use a 2.4” Arduino TFT LCD screen to build our own Arduino Touch Screen calculator that could perform all basic calculations like Addition, Subtraction, Division and Multiplication.

Before we actually dive into the project it is important to know, how this 2.4” TFT LCD Module works and what are the types present in it. Let us take a look at the pinouts of this 2.4” TFT LCD screen module.

As you can see the pins can be classified in to four main classifications such as LCD Command Pins, LCD Data Pins, SD Card Pins and Power Pins, We need not know much about the detailed working of these pins since they will be take care by our Arduino Library.

You can also find an SD card slot at the bottom of the module shown above, which can be used to load an SD card with bmp image files, and these images can be displayed in our TFT LCD screen using the Arduino Program.

Another important thing to note is your Interface IC. There are many types of TFT modules available in the market starting from the original Adafruit TFT LCD module to cheap Chinese clones. A program which works perfectly for your Adafruit shield might not work the same for Chinese breakout boards. So, it is very important to know which types of LCD display your are holding in hand. This detail has to be obtained from the vendor. If you are having a cheap clone like mine then it is most probably using the ili9341 driver IC.You can follow this TFT LCD interfacing with Arduino tutorial to try out some basic example programs and get comfortable with the LCD screen. Also check out our other TFT LCD projects with Arduino here:

If you planning to use the touch screen function of your TFT LCD module, then you have to calibrate it to make it work properly.  A LCD screen without calibration might work unlikely, for instance you might touch at one place and the TFT might respond for a touch at some other place. These calibrations results will not be similar for all boards and hence you are left on your own to do this.

The best way to calibrate is to use the calibration example program (comes with library) or use the serial monitor to detect your error.  However for this project since the size of buttons is large calibration should not be a big problem and I will also explain how you can calibrate your screen under the programming section below.

The 2.4” TFT LCD screen is a perfect Arduino Shield. You can directly push the LCD screen on top of the Arduino Uno and it will perfectly match with the pins and slid in through. However, as matters of safety cover the Programming terminal of your Arduino UNO with a small insulation tape, just in case if the terminal comes in contact with your TFT LCD screen. The LCD assembled on UNO will look something like this below.

We are using the SPFD5408 Library to get this arduino calculator code working. This is a modified library of Adafruit and can work seamlessly with our LCD TFT Module. You can check the complete program at the end of this Article.

Now, you can use the code below in your Arduino IDE and upload it to your Arduino UNO for the Touch Screen Calculator to work. Further down, I have explained the code into small segments.

As said earlier we need to calibrate the LCD screen to make it work as expected, but don’t worry the values given here are almost universal. The variables TS_MINX, TS_MINY, TS_MAXX, and TS_MAXY decide the calibration of the Screen. You can toy around them if you feel the calibration is not satisfactory.

As we know the TFT LCD screen can display a lot of colours, all these colours have to be entered in hex value. To make it more human readable we assign these values to a variable as shown below.

Okay now, we can get into the programming part. There are three sections involved in this program. One is creating a UI of a calculator with buttons and display. Then, detecting the buttons based on the users touch and finally calculating the results and display them. Let us get through them one by one.

This is where you can use a lot of your creativity to design the User Interface of calculator. I have simply made a basic layout of a calculator with 16 Buttons and one display unit. You have to construct the design just like you will draw something on MS paint. The libraries added will allow you to draw Lines, Rectangle, Circles, Chars, Strings and lot more of any preferred colour. You can understand the available functions from this article.

Another challenging task is detecting the user touch. Every time the user touches somewhere we will able to how where the X and Y position of the pixel he touched. This value can be displayed on the serial monitor using the println as shown below.

Since we have designed the box with width and height of 60 pixel each and have four Rows and for columns starting from (0,0). The position of each box can be predicted as shown in below picture.

Now, since we know the position of all the boxes. When a user touches anywhere we can predict where he has touched by comparing his (X,Y) values with the value for each box as shown below.

The final step is to calculate the result and display them on TFT LCD Screen. This arduino calculator can perform operation with 2 numbers only. These two numbers are named as variables “Num1” and “Num2”. The variable “Number” gives and takes value from Num1 and Num2 and also bears the result.

When a use presses a button, one digit is added to number. When another button is pressed, the previous one digit is multiplied with 10 and the new number is added with it. For example, if we press 8 and then press 5 and then press 7. Then first the variable will hold 8 then (8*10)+5=85 then (85*10)+7 = 857. So finally the variable will have the value 857 with it.

The working of this Arduino Touch Screen Calculator is simple. You have to upload the below given code on your Arduino and fire it up. You get the calculator displayed on your LCD screen.

You have to press the “C” to clear the value on screen each time after performing a calculation. Hope you understood the project and enjoyed building something similar. If you have any doubts feel free to post them on forums or on the comment section below. See you next time with another interesting project until then happy computing!!

Esp8266 Nodemcu Il 9341 Touch Tft . Welcome to my blog about Esp8266 Nodemcu Il 9341 Touch Tft, where I explore the many different facets of this fascinating subject. As a Esp8266 Nodemcu Il 9341 Touch Tft enthusiast, I"m excited to share with you my knowledge, experiences, and insights about this field. Whether you"re an expert or a beginner, my goal is to provide you with engaging and thought-provoking content that will deepen your understanding and appreciation of Esp8266 Nodemcu Il 9341 Touch Tft. Through a mix of articles, videos, and other resources, I"ll cover topics such as content, and more, so that you can discover the latest developments and trends in the world of Esp8266 Nodemcu Il 9341 Touch Tft. My hope is that this blog will become a place for us to connect, share our ideas, and explore the many wonders of Esp8266 Nodemcu Il 9341 Touch Tft together. Thank you for joining me on this journey, and I look forward to hearing your feedback and ideas in the comments section This thread has prompted me to look as well- the last time i needed screens for interfacing to the esp8266 the largest i could find was a 2-8 inch spi tft and two out of 4 had poor touch screens- now i see there are 3-5 inch ones like the one mentioned in 3 but with du pont male connectors instead of the the raspberry connector with touch-

The ili9341 tft module contains a display controller with the same name: ili9341. it’s a color display that uses spi interface protocol and requires 4 or 5 control pins, it’s low cost and easy to use. the resolution of this tft display is 240 x 320 which means it has 76800 pixels. Specifically, i could not find another library which handled rotation while also supporting the esp8266 with the ili9341 (and this particular display, the tjctm24028 spi). i also created a landscape example which handles the display and touch rotation. 2.8" touch lcd spi for esp8266 (nodemcu). Esp8266 ili9341 tft touchscreen wiring using arduino project guidance johnscott december 3, 2020, 9:39am 1 hi i"m trying to connect all the pins from an esp8266 to a ili9341 tft touchscreen. i followed this: 2.8″ touch lcd spi for esp8266 (nodemcu) – nailbuster software inc. but it didn"t work. railroader december 3, 2020, 12:57pm 2. Interfacing esp8266 nodemcu with ili9341 tft display.circuit diagram and arduino code at: simple circuit esp8266 nodemcu ili9341 tft display. Here we wire two representative esp8266 boards: nodemcu and wemos d1 mini to a single row 14 pin header, 320*240 tft display that uses the four wire spi interface. figure 1.wiring diagram: 2.8 inch diagonal 320*240 tft display and an esp8266 nodemcu board. ili9143 controlled tft displays.

This thread has prompted me to look as well. the last time i needed screens for interfacing to the esp8266, the largest i could find was a 2.8 inch spi tft and two out of 4 had poor touch screens. now i see there are 3.5 inch ones, like the one mentioned in #3 but with du pont male connectors instead of the the raspberry connector: with touch. Esp8266 nodemcu il 9341 touch tft used to control under floor heat. it sends setting and room temperature to a raspberry pi, that controls the valves. used to control under floor. Step 4: lcd pinout. the pinout is the following: display sdo miso to nodemcu pin d6 (or leave disconnected if not reading tft) display led to nodemcu pin vin (or 5v, see below) display sck to nodemcu pin d5. display sdi mosi to nodemcu pin d7. display dc (rs ao)to nodemcu pin d3.

And here is a list of article Esp8266 Nodemcu Il 9341 Touch Tft finest By just placing characters one can 1 piece of content into as many 100% readers friendly editions as you like we say to and demonstrate Creating articles is a rewarding experience to you personally. We all find amazing many Nice articles Esp8266 Nodemcu Il 9341 Touch Tft interesting image although all of us only present this image that individuals consider are the greatest reading.

Your images Esp8266 Nodemcu Il 9341 Touch Tft is with regard to amazing demo if you just like the about make sure you buy the first images. Help your writter simply by buying the original word Esp8266 Nodemcu Il 9341 Touch Tft therefore the creator can offer the top image in addition to carry on functioning At looking for offer all kinds of residential and commercial assistance. you have to make your search to receive a free quote hope you are okay have a good day.

used to control under floor heat. it sends setting and room temperature to a raspberry pi, that controls the valves. interfacing esp8266 nodemcu with ili9341 tft display. circuit diagram and arduino code at: connecting tft lcd touch screen with nodemcu esp8266 check tutorial article here nodemcu arduino ide 1.6.7 utft library library for esp and arduinoide: github gnulabis utft esp8266 lcd aliexpress item nodemcu lua wifi development board based on the esp8266 internet of things 32338129505 3 demos of the nodemcu board using 3 different libraries. info: nodemcu tft lcd screen info and other demos: my website link for downloads (if any are present), etc: .accbs.co.uk video.aspx?video id=2xsl6jswls0 a short and here is the url that i got this project from. credit to the person that did it. instructables id esp8266 wifi analyzer esp8266 nodemcu with a working ili9341 display hardware esp8266 or nodemcu 2.2 inch tft lcd software library adafruit example draw 3d cube on lcd display from esp8266 without any mcu. welcome to another arduino video tutorial! in this video, we are going to take a first look at this 2.8" color tft touch display! Подключил дисплей tjctm24028 spi к esp8266 nodemcu, дисплей на ili9341 240х320. тут распиновка

//#define ILI9488_DRIVER // WARNING: Do not connect ILI9488 display SDO to MISO if other devices share the SPI bus (TFT SDO does NOT tristate when CS is high)