esp32 tft lcd arduino for sale

Easy to Program - Includes complimentary GUI Software that makes programming fast and easy for engineers. This can reduce your project"s time and expense. The SCBRHMI 5 inch TFT LCD display module can easily create an intuitive touch interface by adding png/jpg/bmp/svg/gif image files as your background and defining functions by components. It"s easy even for beginners.

Lots of Powerful Upgrades - New Launch Intelligent 5 inch HMI resistive touch screen can be controlled by any MCU. This offers 1 G Hz Cortex A8 CPU driving device and 256 Flash memory for HMI projects. You also get RS232/TTL UART Interface and serial USB port. The module is compatible with 7/28V wide operation voltage. (This is an excellent choice for your Equipment Control Arduino, STM32, ESP8266, ESP32, UNO, Mega, Nano, Raspberry Pi and R3 projects.)

Clear, Detailed, Hi Res HD - Our Smart TFT LCD touchscreen offers excellent 800x480 high resolution with 4-wire resistance touch screen. Rich 262K (18bit) color for high color restore. Rectangular ratio 16:9 display format conversion. 70°/70°/50°/70° wide viewing angle, adjustable brightness（300 cd/m²) , TTF Font and contrast (500:1) offers you the ultimate project experience to accomplish more with improved results.

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The Makerfabs 3.5 inch TFT Touch is great but the refresh rate is always a problem, some customers feedback they want a higher speed display. The ESP32-S2 Parallel TFT has a much higher refresh rate, but the disadvantage is the lack of Bluetooth...

That is why this latest ESP32-S3 Parallel TFT, compares to the S2 version, not only more SRAM and ROM, the Bluetooth 5.0 make it fit for applications such as local monitoring/controlling.

This 3.5" 320x480 TFT LCD driver is ILI9488, it uses 16bits parallel line for communication with ESP32-S3, the main clock could be up to 20MHz, making the display smooth enough for video displays. With this display, you can freely to create more IoT display projects, check the demo project in the video:

Same as the S2 version, there 2 onboard Mabee pins(A I2c and an IOs) with the breakout connectors, to connect the ESP32-S2 display with sensors/ actuators, suitable for IoT applications.

The TFT display is a kind of LCD that is connected to each pixel using a transistor and it features low current consumption, high-quality, high-resolution and backlight. This 2.8-inch full color LCD has a narrow PCB display. The resolution is 320×280 pixels and it has a four-wire SPI interface and white backlight.

An excellent new compatible library is available which can render TrueType fonts on a TFT screen (or into a sprite). This has been developed by takkaO and is available here. I have been reluctant to support yet another font format but this is an amazing library which is very easy to use. It provides access to compact font files, with fully scaleable anti-aliased glyphs. Left, middle and right justified text can also be printed to the screen. I have added TFT_eSPI specific examples to the OpenFontRender library and tested on RP2040 and ESP32 processors, however the ESP8266 does not have sufficient RAM. Here is a demo screen where a single 12kbyte font file binary was used to render fully anti-aliased glyphs of gradually increasing size on a 320x480 TFT screen:

The TFT configuration (user setup) can now be included inside an Arduino IDE sketch providing the instructions in the example Generic->Sketch_with_tft_setup are followed. See ReadMe tab in that sketch for the instructions. If the setup is not in the sketch then the library settings will be used. This means that "per project" configurations are possible without modifying the library setup files. Please note that ALL the other examples in the library will use the library settings unless they are adapted and the "tft_setup.h" header file included. Note: there are issues with this approach, #2007 proposes an alternative method.

Support for the ESP32-S2, ESP32-S3 and ESP32-C3 has been added (DMA not supported at the moment). Tested with v2.0.3 RC1 of the ESP32 board package. Example setups:

Smooth fonts can now be rendered direct to the TFT with very little flicker for quickly changing values. This is achieved by a line-by-line and block-by-block update of the glyph area without drawing pixels twice. This is a "breaking" change for some sketches because a new true/false parameter is needed to render the background. The default is false if the parameter is missing, Examples:

Frank Boesing has created an extension library for TFT_eSPI that allows a large range of ready-built fonts to be used. Frank"s library (adapted to permit rendering in sprites as well as TFT) can be downloaded here. More than 3300 additional Fonts are available here. The TFT_eSPI_ext library contains examples that demonstrate the use of the fonts.

Users of PowerPoint experienced with running macros may be interested in the pptm sketch generator here, this converts graphics and tables drawn in PowerPoint slides into an Arduino sketch that renders the graphics on a 480x320 TFT. This is based on VB macros created by Kris Kasprzak here.

The library now supports the Raspberry Pi Pico with both the official Arduino board package and the one provided by Earle Philhower. The setup file "Setup60_RP2040_ILI9341.h" has been used for tests with an ILI9341 display. At the moment only SPI interface displays have been tested. SPI port 0 is the default but SPI port 1 can be specifed in the setup file if those SPI pins are used.

The library now provides a "viewport" capability. See "Viewport_Demo" and "Viewport_graphicstest" examples. When a viewport is defined graphics will only appear within that window. The coordinate datum by default moves to the top left corner of the viewport, but can optionally remain at top left corner of TFT. The GUIslice library will make use of this feature to speed up the rendering of GUI objects (see #769).

An Arduino IDE compatible graphics and fonts library for 32 bit processors. The library is targeted at 32 bit processors, it has been performance optimised for STM32, ESP8266 and ESP32 types. The library can be loaded using the Arduino IDE"s Library Manager. Direct Memory Access (DMA) can be used with the ESP32, RP2040 and STM32 processors with SPI interface displays to improve rendering performance. DMA with a parallel interface is only supported with the RP2040.

For other processors the generic only SPI interface displays are supported and slower non-optimised standard Arduino SPI functions are used by the library.

"Four wire" SPI and 8 bit parallel interfaces are supported. Due to lack of GPIO pins the 8 bit parallel interface is NOT supported on the ESP8266. 8 bit parallel interface TFTs (e.g. UNO format mcufriend shields) can used with the STM32 Nucleo 64/144 range or the UNO format ESP32 (see below for ESP32).

The library supports some TFT displays designed for the Raspberry Pi (RPi) that are based on a ILI9486 or ST7796 driver chip with a 480 x 320 pixel screen. The ILI9486 RPi 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. Note that due to design variations between these displays not all RPi displays will work with this library, so purchasing a RPi display of these types solely for use with this library is not recommended.

A "good" RPi display is the MHS-4.0 inch Display-B type ST7796 which provides good performance. This has a dedicated controller and can be clocked at up to 80MHz with the ESP32 (55MHz with STM32 and 40MHz with ESP8266). The MHS-3.5 inch RPi ILI9486 based display is also supported.

Some displays permit the internal TFT screen RAM to be read, a few of the examples use this feature. 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 datasheet 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.

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 "Animated_dial" example shows how dials can be created using a rotated Sprite for the needle. To run this example the TFT interface must support reading from the screen RAM (not all do). The dial rim and scale is a jpeg image, created using a paint program.

The XPT2046 touch screen controller is supported for SPI based displays only. The SPI bus for the touch controller is shared with the TFT and only an additional chip select line is needed. This support will eventually be deprecated when a suitable touch screen library is available.

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. Only one SPI device can be connected to the FLASH pins and the chips select for the TFT must be on pin D3 (GPIO0).

Configuration of the library font selections, pins used to interface with the TFT and other features is made by editing 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.

It would be possible to compress the vlw font files but the rendering performance to a TFT is still good when storing the font file(s) in SPIFFS, LittleFS or FLASH arrays.

Anti-aliased fonts can also be drawn over a gradient background with a callback to fetch the background colour of each pixel. This pixel colour can be set by the gradient algorithm or by reading back the TFT screen memory (if reading the display is supported).

The common 8 bit "Mcufriend" shields are supported for the STM Nucleo 64/144 boards and ESP32 UNO style board. The STM32 "Blue/Black Pill" boards can also be used with 8 bit parallel displays.

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 you load a new copy of TFT_eSPI then it will overwrite your setups if they are kept within the TFT_eSPI folder. One way around this is to create a new folder in your Arduino library folder called "TFT_eSPI_Setups". You then place your custom setup.h files in there. After an upgrade simply edit the User_Setup_Select.h file to point to your custom setup file e.g.:

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.

This is a single-chip controller/driver for 262K-color, graphic type TFT-LCD.  It consists of 396 source line and 162 gate line driving circuits. This chip is capable of connecting directly to an external microprocessor, and accepts Serial Peripheral Interface (SPI), 8-bit/9-bit/16-bit/18-bit parallel interface.

Many Arduino projects require adequate display of what is being monitored. Think of time, temperature, humidity, pressure, sound, light, voltages, or combinations of recorded data in a weather station. With the addition of fast and capable ESP32 microcontroller boards to my personal ‘fleet’ my collection of good old Arduino Unos with their TFT display shields seemed prone to gather dust. The ESP32 combines well with TFT displays through a 4-pin SPI interface* while the Uno shields have parallel interfaces that feature 28 pins of which a minimum of 13 is necessary for the daily display business (see figure 2). A parallel interface is generally faster than a SPI interface. The prospect of a bunch of shield displays with fast parallel interface parked forever in a deep drawer was a stimulus for me to start a project to connect these shields to an ESP32. Fortunately there are several solutions available of which I selected the one proposed by Alberto Iriberri Andrés at https://www.pangodream.es/ili9341-esp32-parallel. However, the nightmarish prospect of connecting shield after shield with an ESP with unwieldy Dupont jumper wires inspired me to create a Uno-shield compatible parallel ESP32 TFTdisplay workbench for the purpose of checking all my Uno TFT shields, one by one. Here follows the design, wiring, and the results with a collection of parallel Uno shield type displays.

The market is swamped with TFT shields that can be placed directly on the pin sockets of an Arduino Uno. These shields feature parallel interfaces. They have in common that there are four pin header blocks through which one can stick such a shield very handy right onto a Uno (fig. 2). The displays mounted on these shields have different pixel dimensions and, more important, different controller chips. Most commonly used are ILI9341, ILI9481 and ILI 9486 chips. The best performing TFT shields are equipped with 3V-5V voltage converters (e.g. the shield shown in fig 2) but there are plenty of cheap shields available that lack a voltage regulator and therefore accept only 3V.

Controllers need their own specific driver to make the display work correctly. A major effort to supply the Arduino world with adequate drivers for ESP8266 and ESP32 microprocessors running smoothly with the above ILI controllers has been undertaken in recent years by the electronics engineer known as Bodmer: the TFT_e_SPI.h library.

So what I needed is a board that accomodates an ESP32 and that has enough space to accommodate a variety of small (2.4 inch) and large (3.95 inch) Uno TFT shields.

The base board consists of a doule-sided soldering board fastened with four nylon spacers on a piece of cardboard. Mounted on this base are two 15-pin parallel socket headers to accommodate an ESP32 microcontroller board and the four socket headers to accommodate the Arduino Uno TFT shields to be tested. As screen diagonals of TFT shields in my ‘arsenal’ vary between 2.4 inch and 3.95 inch, a 12080 mm double-sided soldering board with 4230 holes was selected for this purpose. The positioning of the socket headers is shown in figure 3. There are also two 2-pin pin headers to allow to select the proper voltage to power the display being tested (with jumpers).

12080 mm double-sided soldering board featuring 4230 holes, two 15-pin socket headers, two 6-pin socket headers, two 8-pin socket header, one 3-pin socket header, one black 2-pin socket header (black), two 2-pin headers (red), four nylon bolts, four nylon spacers and four nylon nuts, ESP32-WROOM32 microcontroller board with 30 pins, wire, two jumpers.

The positioning of pins on the original Arduino Uno does not follow the uniform 2.54 mm (0.1 inch) pitch rule. Any Uno parallel TFT shield therefore will not immediately fit a standard soldering board. On the back of each shield are jumper blocks labeled J1 through 4 (figure 2). We call J1 here the ‘SD jumper block’, J2 the ‘parallel jumper block’, J3 the ‘control jumper block’ and J4 the ‘power block’. Part of the SD jumper block is occupied by the parallel data interface. Some manoevering makes it clear trhat the J2-J3-J4 blocks fit the holes of the soldering board while the parallel jumper block (J1) is the outlier. Fortunately, the pins in all blocks follow the 2.54 mm pitch rule. It is J1 as a whole that is half a unit positioned ‘out of pitch’. Through this unorthodoxy, say asymmetry, a TFT shield fits an Arduino in only one way. Very clever. The present soldering board was adapted to this configuration by cutting a narrow sleeve where the pins of the J1 parallel jumper block should be, just wide enough to let the pins of the corresponding socket header through. Then an extra piece of soldering board was prepared and fastened with wire and solder under the sleeve, taking care that the J1 accepting socket header would exactly match jumper block J1.

The design is quite simple: two parallel rows of 15-pin socket headers serve as a mounting point for the ESP32 (figures 2,3). These sockets are positioned in the upper left corner of the board to leave as much area as possible to position the TFT shields. Here, TFT shields are oriented landscape. The bench is designed only for displaying data and graphs only, with no SD card reader support.

All Uno TFT shields have three pins that deal with power (3V3, 5V, GND), five pins that are necessary for display control and eight pins connected with the parallel data transfer interface, i.e., there is a total of 16 pins that need to be wired (figure 2). In addition I planned three ‘free’ pins of the ESP32 available via pin sockets for input-output puposes: pins D2, D5 and D15 (figure 4).

With so many wires it is necessary to bring order in the assembly of the bench. One can distinguish (1) power wires, (2) TFT control wires, (3) parallel interface wires, (4) additional wiring. One by one the groups of wires were mounted on the soldering board.

The group of control wires originates from pins D26, D27, D14, D12 and D13 and connect to the socket header that accomodates TFT shield jumper J1 (figure 5).

There are eight data pins on the TFT shields, marked LCD_D0 through LCD_D07. LCD-00 and LCD_01 are pins on jumper block J3 while the remaining LCD_nn pins can be found on jumper block J2. These pins must be connected to, respectively, pins RX2, D4, D23, D22, D21, D19, D18 and TX2 (figure 6).

Bodmer’s TFT_eSPI library is different than other libraries, e.g. Adafruit_GFX and U8G2 in the sense that there is no ‘constructor’. Pin definitions for each type of controller are in TFT_eSPI systematics stored in a separate Setup_nn.h file that is placed in a folder with the name ‘User_Setups’. In turn, the specific Setup_nn.h is called in another stetup file named User_Setup_Select.h. Consider the systematics as a kind of two-stage rocket. Both stages need to be edited befor launch. The first stage is User_Setup_Select.h and the second stage is Setup_nn.h.

An example of the specific Setup_nn.h file for one of my ILI9341 shields (the one shown in figure 1) is named ‘Setup_FW_WROOM32_ILI9341_parallel_TFT_016.h’. This is a file editable with any ASCII editor.

Figure 1 shows one of my Uno TFT shields mounted on the bench, running the example ‘TFT_graphicstest_one_lib,’ that can be found in the Arduino IDE under File, Examples, TFT_eSPI, 320×240, of course after correct installation of Bodmer’s TFT_eSPI library. With an ESP32. My own ‘ESP32_parallel_Uno_shield_TFT_radar_scope.ino’ runs fine: the downloadable demo sketch which mimics an aviation traffic controller’s radar scope with a sweeping beam. I created this sketch in 2017 as a demo for one of my first Arduino Uno TFT shields**. The body of that demo was used for the present demo sketch.

The experiences with the TFT shields lead to the following rule of thumb: first try to figure out the correct controller (this on an Arduino Uno with David Prentices’ ‘MCUFRIEND_kbv.h’), then checking the User_Setup_nn.h file icreated for this shield n the TFT_eSPI library system, and then try to upload first with the 3V3 jumper closed, then again (if necessary) with the 5V jumper closed, and finally with both jumpers closed.