I am using a 2.8" TFT LCD display with touchscreen. As a display, it works just fine, but I cannot get the touchscreen to work.

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Standard Display Resolution Sizes ; High Definition (HD), 1280 x 720 ; Full HD, FHD, 1920 x 1080 ; 2K, Quad HD, QHD, 2560 x 1440 ; 4K, Ultra HD, 3840 x 2160 ...

I can see from the picture in above that the display panel shown is exactly the same as mine. It says that XPT2046_Touchscreen is meant to be a compatible with sketches written for Adafruit_STMPE610. I would expect it to also work with Arduino UNO. Is that a correct assumption?

5TFT Display

PIN No, Symbol, Funktion. 1, GND, Ground for analog circuit. 2, VDDT, Power Supply. 3, SCL, I2C clock input. 4, NC, No connect.

Display text, images, and patterns on a 128x64 OLED module using Arduino Uno. Here, we are using Adafruit's library for SSD1306. This library is available on ...

I2CTFT Display

9 Jul 2024 — OLED, an advanced form of LED, stands for organic light-emitting diode. Unlike LED, which uses a backlight to provide light to pixels, OLED is defined as ...

I believe there are libraries for connecting the four touchscreen leads directly to the microprocessor, thus eliminating need to use the XPT2046. But I am reluctant to go down this path as I guess it will use a lot of the microprocessor resources.

The display has XPT2046 mounted on the pcb (but labelled HR2046). I soldered very fine wires to the four pins on XPT2046 which are connected to the touch panel, not to the 4-way ribbon. Resistance between XP,XM is approx 300 ohms, and between XP,XM is approx 550 ohms.

You can test the XPT2046 by sending regular SPI commands. But quite honestly, Touch, TFT, SD should all work fine on the same SPI bus. Just use existing library example code.

TFT touchscreen Arduino

I have followed the instruction there, including installing the XPT2046 Touchscreen Arduino Library. The sketch I am running is "TouchTest", from the examples given with the library.

Personally, I use 3.3V/5V switchable Uno clone boards. Or Zero, Due, STM32, Teensy3.x, Teensy4.0 These all work fine. Because they all have 3.3V logic.

I've hooked up the display panel to my ESP32 Do-it Dev board with direct connection, no level shifting. I am using a sketch called mapTouch.ino copied from here:

The actual wiring is on a breadboard for leaded components, and is a rather untidy assemblage of wires and resistors, so I won't attempt a photo or diagram. But connections are as follows: UNO board pin 2 to T_IRQ via resistor divider UNO board pin 8 to T_CS via resistor divider UNO board pin 11 to T_DIN (MOSI) via resistor divider UNO board pin 12 to T_DO (MISO) direct (input to UNO) UNO board pin 13 to T_SCK via resistor divider

I mount 14x1 and 4x1 female sockets on ProtoShield to receive the Red ILI9341 boards. And solder wires to the Arduino Shield header pins. This lets me use the same display Adapter Shield on Uno, Zero, Due, STM32, Teensy3.x, Teensy4.0, Xmega, FRDM, ESP32, ESP8266, ...

4.3TFT Display

tft-lcd是什么

I have made many attempts using various Arduino libraries, all without success. The most straightforward route seems to be as on this web page:

It sounds as if you have a Touch panel i.e. you have tried soldering to 4-way ribbon. This might have broken it. You should see a steady resistance between XP,XM. Likewise YP,YM.

Now the display and touch panel are both working -- success! It seems that simple resistor divider level shifters were causing problems.

High quality PCAP Large Touch Screen Monitor , SS Raspberry Pi Touch Screen 15 Inch from China, China's leading 1000nits Industrial Touch Screen Display ...

TFT display

The silkscreen on back of my TFT display reads: TJCTM24028-SPI 2.8 TFT SPI 240*320 v1.1 The touch screen controller chip is labelled HR2046. Searching the web seems to indicate that this is identical to XPT2046.

By dint of some very finicky soldering I have managed to attach leads to the four connections to the touch panel, and measured resistances. They are as I would expect -- resistance between the X and Y plates is about 30Mohm not touched, and about 1kohm when touched, which indicates that the panel is OK.

So now I am stuck. It is possible that the HR2046 chip on the panel is faulty, but this seem unlikely. Could there be some error in the code or library, or perhaps some subtle difference between HR2046 and XPT2046 ?

The code compiles and loads, no problem, and sends readings to the serial monitor. As soon as the load is finished, the serial monitor displays a continuous stream of lines which read: Pressure = 4095, x = 0, y = 0 This seems to suggest the panel is being touched continually, although in fact there is no touch. Touching the panel has no effect.

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Touchscreen Arduino Library for XPT2046 Touch Controller Chip - GitHub - PaulStoffregen/XPT2046_Touchscreen: Touchscreen Arduino Library for XPT2046 Touch Controller Chip

TFTLCD screen

2024521 — ◉Big size lcd screen is designed with various combination solutions in mind, providing versatile display functions. ◉Custom size lcd screen ...

TFT touchscreen full FORM

I am using it with Arduino UNO board, and I have checked carefully that the connections are correct, as given in the example below.

202133 — Aspect ratio refers to the relationship between something's width and height, and is commonly used to describe computer and TV displays, camera sensors, ...

The ILI9341 will only work with level shifters i.e. 3.3V logic The XPT2046 will work with 3.3V logic e.g. on the same SPI bus

/cd/m² nitsnit= cd/m² ...

In conclusion, while TN panels may be more affordable and offer faster response times, IPS panels provide superior color accuracy and wider viewing angles, ...

I have an ESP32 Do-it Dev board which has 3.3V levels, so I will try that without any level shifting. Will report on progress. Thanks. Ken.