tft lcd 2 spi nodemcu arduino code pricelist

I don"t actually have a display at present. I purchased a 7in one some months ago. It had an LT7381 controller and was supplied with a Hunda LT7381 library for Arduino and some basic display design software. However, I couldn"t get the hardware to work despite it being described as Arduino compatible. As it turned out, it also didn"t display anything when used with the supplied USB adaptor and design software for the PC, so it may have been faulty anyway. I posted something at the time but the controller is quite new and there was not much feedback. I ended up sending it back and getting a refund although it still cost me to send it back to china.

The reason I posted was because the project is now at the stage where the LCD display really needs to be added and I intended to get advice before making another purchase. In the meantime I have been working on the project using a 20x4 display.

Thank you for that information. Since I am using an ESP8266, it sounds like I need to look for a board that uses SPI for the display. From what I can tell, it seems that some of the cheap ones from china only use SPI only for the SD card which further confuses things.

The LT7381 board referenced earlier was meant to work over SPI and that is how I tried to use it. I will make sure that whatever I get as its replacement can also be driven via SPI. I expect that the ESP8266 has insufficient pins for parallel?

I don"t posses an Arduino shield which is why I was trying to ascertain whether I need something like that. What is their purpose? A lot of photos show the display plugged into one and then into typically a Mega 2560. I don"t understand what the purpose of the shield is? Is it just a convenient way to provide a means of fitting the board to an Arduino with level shifting? SPI needs only 4 wires. Can"t these be connected directly to the ESP SPI pins?

I want to use a display without pcb so i can connect it to my own pcb. I don"t understand why my display stays white or black (2 different displays).

I have tried david_prentice"s MCUFRIEND_kbv Library with some hacks to no avail. I tried to hack the library for ESP8266 (updated write_8 and read_8 functions in mcufriend_sheild.h and defined SUPPORT_4532) - using these connections

This person ( (146) ESP8266 and 2.4" 8-bit parallel ST7781 TFT Uno Shield - YouTube) got the same display working w/ nodeMCU (albeit their module is 5V one and has hack on the LDO).

The Bodmer/TFT_eSPI: Arduino and PlatformIO IDE compatible TFT library optimised for the Raspberry Pi Pico (RP2040), STM32, ESP8266 and ESP32 that supports different driver chips (github.com) library says 8 bit parallel is not possible w/ ESP8266 because of shortage of GPIOs - but ESP8266 has 16 GPIOs (out of which 4 are SPI). I don"t plan on using touch or SD card functionality anyways. The LCD requires 8(data) + 4 (Control) + 1 = 13 pins, which should fit in the 16 provided by ESP8266 ? Please let me know if I am missing anything.

Anyways - the first question at hand would be - is it possible to run 8 bit parallel tft w/ ESP8266, followed by - which library can do the job if possible.

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).

This TFT display is big (2.8 diagonal) bright and colorful! 240x320 pixels with individual RGB pixel control, this has way more resolution than a black and white 12864 display. It Works well with Arduino and other micro-controller boards.

The display can be used in two modes: 8-bit and SPI. For 8-bit mode, you"ll need 8 digital data lines and 4 or 5 digital control lines to read and write to the display (12 lines total). SPI mode requires only 5 pins total (SPI data in, data out, clock, select, and d/c) but is slower than the 8-bit mode. In addition, 4 pins are required for the touchscreen (2 digital, 2 analogs).

This 2.8 inch SPI Touch Screen Module is wrapped up into an easy-to-use breakout board, with SPI connections on one end and 8-bit on the other. Both are 3-5V compliant with high-speed level shifters so you can use with any microcontroller. If you"re going with SPI mode, you can also take advantage of the onboard Micro SD card socket to display images.

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The Nextion approach consists of a TFT LCD that has brains and memory built in, and a Windows editor (HMI) to develop your graphical interface by placing images and text on a screen and designing how they will interact.   You can even do some programmingon the base device and more so on the enhanced version (which has GPIO pins).  You could, for example do an entire project solely on the Nextion screen (enhanced model) by connecting a temperature and other sensors directly and reading the results.  What I (and most others do) is connect it to an Arduino or  EPS8266.   These MCUs become the brains to process input from sensors etc and simply need to send commands over serial to display results graphically.  You can see this in action with my WIoT-2.

The general idea is you develop your interface (HMI) on the Nextion.  Lay out all the graphics, text, buttons etc and assign them variable names.  You can then develop your sketch which procesess sensor and other data and sends the commands over serial to update the values in the interface.  You can also  control the interface (i.e. change a page, force a button click etc etc).  In the HMI, you lay out your graphics, buttons and text, compile it, transfer the .tft file to a Micro SD card, then load the card into the back of the Nextion, and power it up.  This will load the tft file into the firmware of the Nextion.  Once complete, disconnect power, remove the card, then power it back up.  You will see your screen with graphics and default values you created.  You compile the sketch and upload that to the MCU and you have a project!   Then, connect +5V, GND and the TX/RX lines to your MCU and you’re done.  Easy peasy!  My WIoT-2 project provides lots of info and as well as a sketch and HMI file.

There’s no question that the Nextion TFT’s are more expensive than other TFT’s out there.   However, you have to consider the total cost of ownership.  What is your time worth? How complex is it to draw graphics to other TFT’s?  Prior to the Nextion, I was using other TFTs that used SPI to communicate. They require graphics and font processing code to be written in your MCU and pushed from the MCU to the screen when displaying content.  You have to do this for each element. For example, to place some text you have to send separate commands to define which font to use, which size, it’s colour, and x/y placement.  It also requires many debug runs to ensure you have the placement correct.  This is very time consuming.  Over 80% of my time coding the original WIoT was dedicated to writing code to manipulate graphic / button elements to send to the RA8875 TFT controller and LCD I had.  Considering this, is that extra ~30% cost of a Nextion worth the many more hours you have to put in coding your project? I can safely say definitely not.  I estimate that I put in more than 50 hours writing code to interface with the RA8875 driver and coming up with the screens/graphics/fonts for my original WIoT.  It was a lot of work.  The Nextion and HMI Editor made this easy and slick  (used in WIoT-2).  I haven’t even mentioned the time it took me to learn how to create custom fonts and then integrate them into the libraries.  The Nextion has a tool built-in and does all the heavy lifting automatically.  Again, don’t forget – after doing all this, the other methods require the MCU to draw graphics by sending pixel-by-pixel over the SPI line.  The Nextion has all graphics and fonts in memory, so all your MCU has to do is issue serial (text) commands to set pictures and change text – which makes things very zippy.  As an example, it takes 3-5 seconds to update 1 weather icon with the RA8875 in my original WIoT.  My MCU is sending a 100x100px image over SPI each time the weather refreshes.  In WIoT-2, the Nextion does an entire page with all graphics/text (including background graphic) in 1-2 seconds.  The reason is all graphics are already in memory.  So changing a weather icon can be done by simply stating pic=2,and BAM it’s updated in a flash.   That’s a huge improvement.  Switching one graphic for another is a split second action and a single command.

Font Generation:  The Nextion Editor comes with a font tool that allows you to select any system font that you have and convert it for use on the Nextion.  There is no ugly creation or modifications to font libraries etc, it automatically makes the font available (by ID) and embeds it in the TFT file package.

Where to buy:  Nextion TFT LCD 5”    (Other sizes:2.4“, 3.2“, 4.3“, 5.0“, 7.0” ).  Note – Although Banggood has a funny name, I use them all the time.  Prices are competitive, free shipping and the best customer service from an overseas site.

This ESP8266 ESPDuino NodeMcu SPI Module TFT LCD display has 128 x 128 resolution and 262 color, it uses SPI interface to communicate with controller such as Arduino Uno and ESP8266.