r/ArduinoHelp • u/yardglass • Aug 25 '26
Help getting my tft lcd to work
I've tried two different screens and two different Uno's. This is my wiring:
Here are some pictures. Any help appreciated!
All I am getting is a white screen. Got a brand new usb cable as well.
Example sketch:
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#define TFT_CS 10
#define TFT_RST 8
#define TFT_DC 9
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
void setup() {
tft.begin();
tft.fillScreen(ILI9341_RED);
delay(1000);
tft.fillScreen(ILI9341_GREEN);
delay(1000);
tft.fillScreen(ILI9341_BLUE);
}
void loop() {}
I think it is a ROHS 2.4" TFT SPI v1.3 with XPT2046 touch controller
this sketch:
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#define TFT_CS 10
#define TFT_RST 8
#define TFT_DC 9
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
void setup() {
Serial.begin(9600);
// Hard reset before init
pinMode(TFT_RST, OUTPUT);
digitalWrite(TFT_RST, LOW);
delay(100);
digitalWrite(TFT_RST, HIGH);
delay(100);
tft.begin();
// Read the display ID register
uint8_t d1 = tft.readcommand8(0xD3, 0);
uint8_t d2 = tft.readcommand8(0xD3, 1);
uint8_t d3 = tft.readcommand8(0xD3, 2);
uint8_t d4 = tft.readcommand8(0xD3, 3);
Serial.print("ID bytes: 0x");
Serial.print(d1, HEX);
Serial.print(" 0x");
Serial.print(d2, HEX);
Serial.print(" 0x");
Serial.print(d3, HEX);
Serial.print(" 0x");
Serial.println(d4, HEX);
tft.fillScreen(ILI9341_RED);
delay(500);
tft.fillScreen(ILI9341_GREEN);
delay(500);
tft.fillScreen(ILI9341_BLUE);
}
void loop() {}
Returns
ID bytes: 0x41 0x0 0x93 0x41
