esp32 arduino tft display brands

This board works fine with TFT_eSPI when the ST7789 driver is selected. The pin settings are different and the RGB colour order is reversed compared to other boards so I have added an option to the TFT_eSPI library to set the colour order.

I have set the SPI rate to 80MHz and the ST7789 TFT seems to work perfectly at that clock speed, the higher clock frequency boosts the drawing speed (e.g. clear screen in 18ms as opposed to 33.3ms).

The Grove I2C connector is not soldered in, this is clearly because the pins would poke through the board and damage the back of the display. It would be possible to "surface mount" the connector by bending the pins but I think the solder flowing into the PTH may melt the reflective backlight diffuser screen at the back of the display. One way around this would be to fill the holes with epoxy first.

I"ve bought on AliExpress a cheap 1.77 color display module. Getting it to work on an Arduino was straight forward. But the Arduino is slow. I also got it working on an Esp8266, which was also straight forward. However getting it to work on an ESP32 was a little harder. I"ve tried several libraries, e.g. AdaFruit and UcgLib. These didn"t work. After some investigations the SPI speed was too high for the display. I tried to change the libs to reduce the speed. I didn"t work either.

So I left the project a few weeks and I started again. I searched for all possible libraries for ST7735 and ESP32. I found some and there was one I manged to get to work.

After tweaking the user_setup.h file I managed to get it to work.The settings that ware important to change was to change the ST7735 defines. Default I choose the first. This one didn"t work. I reduce SPI speed, which had no effect either. Than after some changes and tweaking connections and setting I finally worked. The ST7735 defines all work except the first one with my TFT-screen. I reset all to default and the SPI-speed and it kept working. It works at a 27 MHz speed, which leave me with 450 ms for the 11 test pages. If I increase the speed to the next value of 40 MHz I see errors in the display. So 27 MHz is max for me.

I also checked all other ST7735 defines, and for my TFT the ST7735_GREENTAB3 showed the correct colors. The other values show the wrong colors, but gave an image.

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.

Lucky that the ESP32 and Arduino IDE support the FreeROTS well. When we write small-size embedded software for Arduino we do not need any ROTS, but when its complexity and size increases FreeRTOS is always beneficial, by using FreeRTOS, we can make sure that each task of Arduino have a deterministic execution pattern and every task will meet its execution deadline. In other words, it is a scheduler that assigns Arduino CPU resources to every task according to a scheduling algorithm.

In this article, We will use Arduino IDE to programMakerfabs ESP32 3.5 inch TFT display with FreeRTOS, er, just simple& easy start for learners, and also for myself. This module is based the ESP32 3.5” SPI display with Touch, with plenty of GPIO breakout for external usage, so pretty suitable for this learning.

● It should take a few minutes to install it, after installing, you should be able to find the “ESP32 dev module” inTools->ESP32 Arduino, and also the ports inTools--> ports.

With FreeRTOS, we can make it clear. In this example, we will control 4 channels LED(A/B/C/D), the A/B act as a breath LED with different frequencies, and C/D act as a simple LED, with different modes. Besides, the 3.5 inch display acts as a Timer, with touch control.

xCoreID:Values 0 or 1 indicate the index number of the CPU to which the task should be pinned, ESP32 has 2 cores. Use ARDUINO_RUNNING_CORE by default.

Delay a task for a given number of ticks. The actual time that the task remains blocked depends on the tick rate. Compared to Arduino Delay(), it does not suspend the controller, but just delays the task. So the controller does not stop there or wait, just goes to some other tasks, and as the set time goes, the controller goes back to proceed with this task.

Connect 4 LEDs(with resistor, such as 100 ohm)serial connected to ESP32 3.5” display breakout pins 5/18/19/21, and download the sketch to Makerfabs ESP32 3.5” display board:

You will see the LEDs blinks, and the display counts with stop/start touch. With an oscilloscope, you can also check that the signal is neat, and in-time;

MakerfabsIndoor Environment Expansion is dedicated to CO2/TVOC/Temperature monitoring, It can be directly plugged into the ESP32 3.5” display breakout pins.

In the task definition, there the SGP30/DHT11 communicate with ESP32, and the result was calculated, and then set to globe parameter, for display. And the buzz is controlled separately:…

In the task definition, there the SGP30/DHT11 communicate with ESP32, and result was calculated, and then set to globe parameter, for displaying. And the buzz is controlled separately:

With FreeRTOC, the Arduino logic gets more clear& neat, especially when the projects get complex. Of course, the Multi-task is only the first step of FreeRTOS, there are many other specs such as mailbox/ ring buffer, that would make the ESP32 easier for programming with Arduino IDE. A good place to learn more athere.

If you have further questions about implementing FreeRTOS with Arduino IDE On ESP32 TFT Display, or need someTurnkey PCBA Solutions,please contactservice@makerfabs.com.

We have used Liquid Crystal Displays in the DroneBot Workshop many times before, but the one we are working with today has a bit of a twist – it’s a circle!  Perfect for creating electronic gauges and special effects.

LCD, or Liquid Crystal Displays, are great choices for many applications. They aren’t that power-hungry, they are available in monochrome or full-color models, and they are available in all shapes and sizes.

Today we will see how to use this display with both an Arduino and an ESP32. We will also use a pair of them to make some rather spooky animated eyeballs!

There are also some additional connections to the display. One of them, DC, sets the display into either Data or Command mode. Another, BL, is a control for the display’s backlight.

The above illustration shows the connections to the display.  The Waveshare display can be used with either 3.3 or 5-volt logic, the power supply voltage should match the logic level (although you CAN use a 5-volt supply with 3.3-volt logic).

Another difference is simply with the labeling on the display. There are two pins, one labeled SDA and the other labeled SCL. At a glance, you would assume that this is an I2C device, but it isn’t, it’s SPI just like the Waveshare device.

This display can be used for the experiments we will be doing with the ESP32, as that is a 3.3-volt logic microcontroller. You would need to use a voltage level converter if you wanted to use one of these with an Arduino Uno.

The Arduino Uno is arguably the most common microcontroller on the planet, certainly for experiments it is. However, it is also quite old and compared to more modern devices its 16-MHz clock is pretty slow.

The Waveshare device comes with a cable for use with the display. Unfortunately, it only has female ends, which would be excellent for a Raspberry Pi (which is also supported) but not too handy for an Arduino Uno. I used short breadboard jumper wires to convert the ends into male ones suitable for the Arduino.

Once you have everything hooked up, you can start coding for the display. There are a few ways to do this, one of them is to grab the sample code thatWaveshare provides on their Wiki.

The Waveshare Wiki does provide some information about the display and a bit of sample code for a few common controllers. It’s a reasonable support page, unfortunately, it is the only support that Waveshare provides(I would have liked to see more examples and a tutorial, but I guess I’m spoiled by Adafruit and Sparkfun LOL).

Open the Arduino folder. Inside you’ll find quite a few folders, one for each display size that Waveshare supports. As I’m using the 1.28-inch model, I selected theLCD_1inch28folder.

Once you do that, you can open your Arduino IDE and then navigate to that folder. Inside the folder, there is a sketch file namedLCD_1inch28.inowhich you will want to open.

When you open the sketch, you’ll be greeted by an error message in your Arduino IDE. The error is that two of the files included in the sketch contain unrecognized characters. The IDE offers the suggestion of fixing these with the “Fix Encoder & Reload” function (in the Tools menu), but that won’t work.

You can see from the code that after loading some libraries we initialize the display, set its backlight level (you can use PWM on the BL pin to set the level), and paint a new image. We then proceed to draw lines and strings onto the display.

After uploading the code, you will see the display show a fake “clock”. It’s a static display, but it does illustrate how you can use this with the Waveshare code.

This library is an extension of the Adafruit GFX library, which itself is one of the most popular display libraries around. Because of this, there isextensive documentation for this libraryavailable from Adafruit.  This makes the library an excellent choice for those who want to write their own applications.

As with the Waveshare sample, this file just prints shapes and text to the display. It is quite an easy sketch to understand, especially with the Adafruit documentation.

The sketch finishes by printing some bizarre text on the display. The text is an excerpt from The Hitchhiker’s Guide to the Galaxy by Douglas Adams, and it’s a sample of Vogon poetry, which is considered to be the third-worst in the Galaxy!

Here is the hookup for the ESP32 and the GC9A01 display.  As with most ESP32 hookup diagrams, it is important to use the correct GPIO numbers instead of physical pins. The diagram shows the WROVER, so if you are using a different module you’ll need to consult its documentation to ensure that you hook it up properly.

The TFT_eSPI library is ideal for this, and several other, displays. You can install it through your Arduino IDE Library Manager, just search for “TFT_eSPI”.

There is a lot of demo code included with the library. Some of it is intended for other display sizes, but there are a few that you can use with your circular display.

To test out the display, you can use theColour_Test sketch, found inside the Test and Diagnostic menu item inside the library samples.  While this sketch was not made for this display, it is a good way to confirm that you have everything hooked up and configured properly.

A great demo code sample is theAnimated_dialsketch, which is found inside theSpritesmenu item.  This demonstration code will produce a “dial” indicator on the display, along with some simulated “data” (really just a random number generator).

In order to run this sketch, you’ll need to install another library. Install theTjpeg_DecoderLibrary from Library Manager. Once you do, the sketch will compile, and you can upload it to your ESP32.

One of my favorite sketches is the Animated Eyes sketch, which displays a pair of very convincing eyeballs that move. Although it will work on a single display, it is more effective if you use two.

The first thing we need to do is to hook up a second display. To do this, you connect every wire in parallel with the first display, except for the CS (chip select) line.

The Animated Eyes sketch can be found within the sample files for the TFT_eSPI library, under the “generic” folder.  Assuming that you have wired up the second GC9A01 display, you’ll want to use theAnimated_Eyes_2sketch.

The GC9A01 LCD module is a 1.28-inch round display that is useful for instrumentation and other similar projects. Today we will learn how to use this display with an Arduino Uno and an ESP32.

New Launch intelligent C-Series 3.5 inch-10.1 inch TFT LCD Display Module SCBRHMI products has been conceived as TFT monitor & Touch controller. It includes processor, control program, driver, flash memory, RS232/ TTL /USB, touchscreen, power supply etcso it is a whole display system based on the powerful & easy operating system, which can be controlled by Any MCU. (Very suitable for your Arduino and Raspberry Pi projects.)

They can be used to perform all basic functions, such as text display, image display, curve display as well as touch function, Video & Audio function etc. It has free GUI design software to offer an easy way to create an intuitive and superb touch user interface even for beginners, the User Interface can be more abundant and various. And the 128M flash memory can store your data, configuration files, image file, font file, video file and audio file etc.

Included GUI Design Software Makes Programming Fast & Easy -Our HMI TFT LCD module is a whole display system that comes with no-cost GUI design software(STONE Designer).

Alibaba.com offers 832 esp32 with display products. About 22% % of these are integrated circuits （old）, 14%% are lcd modules, and 7%% are other electronic components.

In this article, you will learn how to use TFT LCDs by Arduino boards. From basic commands to professional designs and technics are all explained here.

In electronic’s projects, creating an interface between user and system is very important. This interface could be created by displaying useful data, a menu, and ease of access. A beautiful design is also very important.

There are several components to achieve this. LEDs,  7-segments, Character and Graphic displays, and full-color TFT LCDs. The right component for your projects depends on the amount of data to be displayed, type of user interaction, and processor capacity.

TFT LCD is a variant of a liquid-crystal display (LCD) that uses thin-film-transistor (TFT) technology to improve image qualities such as addressability and contrast. A TFT LCD is an active matrix LCD, in contrast to passive matrix LCDs or simple, direct-driven LCDs with a few segments.

In Arduino-based projects, the processor frequency is low. So it is not possible to display complex, high definition images and high-speed motions. Therefore, full-color TFT LCDs can only be used to display simple data and commands.

In this article, we have used libraries and advanced technics to display data, charts, menu, etc. with a professional design. This can move your project presentation to a higher level.

In electronic’s projects, creating an interface between user and system is very important. This interface could be created by displaying useful data, a menu, and ease of access. A beautiful design is also very important.

There are several components to achieve this. LEDs,  7-segments, Character and Graphic displays, and full-color TFT LCDs. The right component for your projects depends on the amount of data to be displayed, type of user interaction, and processor capacity.

TFT LCD is a variant of a liquid-crystal display (LCD) that uses thin-film-transistor (TFT) technology to improve image qualities such as addressability and contrast. A TFT LCD is an active matrix LCD, in contrast to passive matrix LCDs or simple, direct-driven LCDs with a few segments.

In Arduino-based projects, the processor frequency is low. So it is not possible to display complex, high definition images and high-speed motions. Therefore, full-color TFT LCDs can only be used to display simple data and commands.

In this article, we have used libraries and advanced technics to display data, charts, menu, etc. with a professional design. This can move your project presentation to a higher level.

Size of displays affects your project parameters. Bigger Display is not always better. if you want to display high-resolution images and signs, you should choose a big size display with higher resolution. But it decreases the speed of your processing, needs more space and also needs more current to run.

After choosing the right display, It’s time to choose the right controller. If you want to display characters, tests, numbers and static images and the speed of display is not important, the Atmega328 Arduino boards (such as Arduino UNO) are a proper choice. If the size of your code is big, The UNO board may not be enough. You can use Arduino Mega2560 instead. And if you want to show high resolution images and motions with high speed, you should use the ARM core Arduino boards such as Arduino DUE.

In electronics/computer hardware a display driver is usually a semiconductor integrated circuit (but may alternatively comprise a state machine made of discrete logic and other components) which provides an interface function between a microprocessor, microcontroller, ASIC or general-purpose peripheral interface and a particular type of display device, e.g. LCD, LED, OLED, ePaper, CRT, Vacuum fluorescent or Nixie.

The display driver will typically accept commands and data using an industry-standard general-purpose serial or parallel interface, such as TTL, CMOS, RS232, SPI, I2C, etc. and generate signals with suitable voltage, current, timing and demultiplexing to make the display show the desired text or image.

The LCDs manufacturers use different drivers in their products. Some of them are more popular and some of them are very unknown. To run your display easily, you should use Arduino LCDs libraries and add them to your code. Otherwise running the display may be very difficult. There are many free libraries you can find on the internet but the important point about the libraries is their compatibility with the LCD’s driver. The driver of your LCD must be known by your library. In this article, we use the Adafruit GFX library and MCUFRIEND KBV library and example codes. You can download them from the following links.

You must add the library and then upload the code. If it is the first time you run an Arduino board, don’t worry. Just follow these steps:Go to www.arduino.cc/en/Main/Software and download the software of your OS. Install the IDE software as instructed.

By these two functions, You can find out the resolution of the display. Just add them to the code and put the outputs in a uint16_t variable. Then read it from the Serial port by Serial.println(); . First add Serial.begin(9600); in setup().

First you should convert your image to hex code. Download the software from the following link. if you don’t want to change the settings of the software, you must invert the color of the image and make the image horizontally mirrored and rotate it 90 degrees counterclockwise. Now add it to the software and convert it. Open the exported file and copy the hex code to Arduino IDE. x and y are locations of the image. sx and sy are sizes of image. you can change the color of the image in the last input.

Upload your image and download the converted file that the UTFT libraries can process. Now copy the hex code to Arduino IDE. x and y are locations of the image. sx and sy are size of the image.

In this template, We converted a .jpg image to .c file and added to the code, wrote a string and used the fade code to display. Then we used scroll code to move the screen left. Download the .h file and add it to the folder of the Arduino sketch.

In this template, We used sin(); and cos(); functions to draw Arcs with our desired thickness and displayed number by text printing function. Then we converted an image to hex code and added them to the code and displayed the image by bitmap function. Then we used draw lines function to change the style of the image. Download the .h file and add it to the folder of the Arduino sketch.

In this template, We created a function which accepts numbers as input and displays them as a pie chart. We just use draw arc and filled circle functions.

In this template, We added a converted image to code and then used two black and white arcs to create the pointer of volumes.  Download the .h file and add it to the folder of the Arduino sketch.

In this template, We added a converted image and use the arc and print function to create this gauge.  Download the .h file and add it to folder of the Arduino sketch.

while (a < b) { Serial.println(a); j = 80 * (sin(PI * a / 2000)); i = 80 * (cos(PI * a / 2000)); j2 = 50 * (sin(PI * a / 2000)); i2 = 50 * (cos(PI * a / 2000)); tft.drawLine(i2 + 235, j2 + 169, i + 235, j + 169, tft.color565(0, 255, 255)); tft.fillRect(200, 153, 75, 33, 0x0000); tft.setTextSize(3); tft.setTextColor(0xffff); if ((a/20)>99)

while (b < a) { j = 80 * (sin(PI * a / 2000)); i = 80 * (cos(PI * a / 2000)); j2 = 50 * (sin(PI * a / 2000)); i2 = 50 * (cos(PI * a / 2000)); tft.drawLine(i2 + 235, j2 + 169, i + 235, j + 169, tft.color565(0, 0, 0)); tft.fillRect(200, 153, 75, 33, 0x0000); tft.setTextSize(3); tft.setTextColor(0xffff); if ((a/20)>99)

In this template, We display simple images one after each other very fast by bitmap function. So you can make your animation by this trick.  Download the .h file and add it to folder of the Arduino sketch.

In this template, We just display some images by RGBbitmap and bitmap functions. Just make a code for touchscreen and use this template.  Download the .h file and add it to folder of the Arduino sketch.