This is a 2.4 inch TFT shield for a Wemos, its a large shield thats more than twice the size of a D1 mini but its an excellent little TFT screen and there are a couple of example to let you get up and running quick unlike some of the Arduino TFT shields which I have had trouble with in the past
This is a picture of the shield
Features
-
2.4” diagonal LCD TFT display
-
320×240 pixels
-
TFT Driver IC: ILI9341
-
Touch Screen controller IC: XPT2046
Code
You need to install various libraries – Adafruit_GFX, Adafruit_ILI9341 and XPT2046_Touchscreen Library
Touchscreen example
#include <SPI.h>
#include <XPT2046_Touchscreen.h>
#define TS_CS D3 //for D1 mini or TFT I2C Connector Shield (V1.1.0 or later)
// #define TS_CS 12 //for D32 Pro
XPT2046_Touchscreen ts(TS_CS);
void setup()
{
Serial.begin(115200);
ts.begin();
ts.setRotation(1);
while (!Serial && (millis() <= 1000))
;
}
void loop()
{
if (ts.touched())
{
TS_Point p = ts.getPoint();
Serial.print("Pressure = ");
Serial.print(p.z);
Serial.print(", x = ");
Serial.print(p.x);
Serial.print(", y = ");
Serial.print(p.y);
delay(30);
Serial.println();
}
}
Default graphics example
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_ILI9341.h>
#define TFT_CS D0 //for D1 mini or TFT I2C Connector Shield (V1.1.0 or later)
#define TFT_DC D8 //for D1 mini or TFT I2C Connector Shield (V1.1.0 or later)
#define TFT_RST -1 //for D1 mini or TFT I2C Connector Shield (V1.1.0 or later)
#define TS_CS D3 //for D1 mini or TFT I2C Connector Shield (V1.1.0 or later)
// #define TFT_CS 14 //for D32 Pro
// #define TFT_DC 27 //for D32 Pro
// #define TFT_RST 33 //for D32 Pro
// #define TS_CS 12 //for D32 Pro
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
void setup()
{
Serial.begin(115200);
Serial.println("ILI9341 Test!");
tft.begin();
// read diagnostics (optional but can help debug problems)
uint8_t x = tft.readcommand8(ILI9341_RDMODE);
Serial.print("Display Power Mode: 0x");
Serial.println(x, HEX);
x = tft.readcommand8(ILI9341_RDMADCTL);
Serial.print("MADCTL Mode: 0x");
Serial.println(x, HEX);
x = tft.readcommand8(ILI9341_RDPIXFMT);
Serial.print("Pixel Format: 0x");
Serial.println(x, HEX);
x = tft.readcommand8(ILI9341_RDIMGFMT);
Serial.print("Image Format: 0x");
Serial.println(x, HEX);
x = tft.readcommand8(ILI9341_RDSELFDIAG);
Serial.print("Self Diagnostic: 0x");
Serial.println(x, HEX);
Serial.println(F("Benchmark Time (microseconds)"));
delay(10);
Serial.print(F("Screen fill "));
Serial.println(testFillScreen());
delay(500);
Serial.println(F("Done!"));
}
void loop(void)
{
for (uint8_t rotation = 0; rotation < 4; rotation++)
{
tft.setRotation(rotation);
testText();
delay(1000);
}
}
unsigned long testFillScreen()
{
unsigned long start = micros();
tft.fillScreen(ILI9341_BLACK);
yield();
tft.fillScreen(ILI9341_RED);
yield();
tft.fillScreen(ILI9341_GREEN);
yield();
tft.fillScreen(ILI9341_BLUE);
yield();
tft.fillScreen(ILI9341_BLACK);
yield();
return micros() - start;
}
unsigned long testText()
{
tft.fillScreen(ILI9341_BLACK);
unsigned long start = micros();
tft.setCursor(0, 0);
tft.setTextColor(ILI9341_WHITE);
tft.setTextSize(1);
tft.println("Hello World!");
tft.setTextColor(ILI9341_YELLOW);
tft.setTextSize(2);
tft.println(1234.56);
tft.setTextColor(ILI9341_RED);
tft.setTextSize(3);
tft.println(0xDEADBEEF, HEX);
tft.println();
tft.setTextColor(ILI9341_GREEN);
tft.setTextSize(5);
tft.println("Groop");
tft.setTextSize(2);
tft.println("I implore thee,");
tft.setTextSize(1);
tft.println("my foonting turlingdromes.");
tft.println("And hooptiously drangle me");
tft.println("with crinkly bindlewurdles,");
tft.println("Or I will rend thee");
tft.println("in the gobberwarts");
tft.println("with my blurglecruncheon,");
tft.println("see if I don't!");
return micros() - start;
}
unsigned long testLines(uint16_t color)
{
unsigned long start, t;
int x1, y1, x2, y2,
w = tft.width(),
h = tft.height();
tft.fillScreen(ILI9341_BLACK);
yield();
x1 = y1 = 0;
y2 = h - 1;
start = micros();
for (x2 = 0; x2 < w; x2 += 6)
tft.drawLine(x1, y1, x2, y2, color);
x2 = w - 1;
for (y2 = 0; y2 < h; y2 += 6)
tft.drawLine(x1, y1, x2, y2, color);
t = micros() - start; // fillScreen doesn't count against timing
yield();
tft.fillScreen(ILI9341_BLACK);
yield();
x1 = w - 1;
y1 = 0;
y2 = h - 1;
start = micros();
for (x2 = 0; x2 < w; x2 += 6)
tft.drawLine(x1, y1, x2, y2, color);
x2 = 0;
for (y2 = 0; y2 < h; y2 += 6)
tft.drawLine(x1, y1, x2, y2, color);
t += micros() - start;
yield();
tft.fillScreen(ILI9341_BLACK);
yield();
x1 = 0;
y1 = h - 1;
y2 = 0;
start = micros();
for (x2 = 0; x2 < w; x2 += 6)
tft.drawLine(x1, y1, x2, y2, color);
x2 = w - 1;
for (y2 = 0; y2 < h; y2 += 6)
tft.drawLine(x1, y1, x2, y2, color);
t += micros() - start;
yield();
tft.fillScreen(ILI9341_BLACK);
yield();
x1 = w - 1;
y1 = h - 1;
y2 = 0;
start = micros();
for (x2 = 0; x2 < w; x2 += 6)
tft.drawLine(x1, y1, x2, y2, color);
x2 = 0;
for (y2 = 0; y2 < h; y2 += 6)
tft.drawLine(x1, y1, x2, y2, color);
yield();
return micros() - start;
}
unsigned long testFastLines(uint16_t color1, uint16_t color2)
{
unsigned long start;
int x, y, w = tft.width(), h = tft.height();
tft.fillScreen(ILI9341_BLACK);
start = micros();
for (y = 0; y < h; y += 5)
tft.drawFastHLine(0, y, w, color1);
for (x = 0; x < w; x += 5)
tft.drawFastVLine(x, 0, h, color2);
return micros() - start;
}
unsigned long testRects(uint16_t color)
{
unsigned long start;
int n, i, i2,
cx = tft.width() / 2,
cy = tft.height() / 2;
tft.fillScreen(ILI9341_BLACK);
n = min(tft.width(), tft.height());
start = micros();
for (i = 2; i < n; i += 6)
{
i2 = i / 2;
tft.drawRect(cx - i2, cy - i2, i, i, color);
}
return micros() - start;
}
unsigned long testFilledRects(uint16_t color1, uint16_t color2)
{
unsigned long start, t = 0;
int n, i, i2,
cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;
tft.fillScreen(ILI9341_BLACK);
n = min(tft.width(), tft.height());
for (i = n; i > 0; i -= 6)
{
i2 = i / 2;
start = micros();
tft.fillRect(cx - i2, cy - i2, i, i, color1);
t += micros() - start;
// Outlines are not included in timing results
tft.drawRect(cx - i2, cy - i2, i, i, color2);
yield();
}
return t;
}
unsigned long testFilledCircles(uint8_t radius, uint16_t color)
{
unsigned long start;
int x, y, w = tft.width(), h = tft.height(), r2 = radius * 2;
tft.fillScreen(ILI9341_BLACK);
start = micros();
for (x = radius; x < w; x += r2)
{
for (y = radius; y < h; y += r2)
{
tft.fillCircle(x, y, radius, color);
}
}
return micros() - start;
}
unsigned long testCircles(uint8_t radius, uint16_t color)
{
unsigned long start;
int x, y, r2 = radius * 2,
w = tft.width() + radius,
h = tft.height() + radius;
// Screen is not cleared for this one -- this is
// intentional and does not affect the reported time.
start = micros();
for (x = 0; x < w; x += r2)
{
for (y = 0; y < h; y += r2)
{
tft.drawCircle(x, y, radius, color);
}
}
return micros() - start;
}
unsigned long testTriangles()
{
unsigned long start;
int n, i, cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;
tft.fillScreen(ILI9341_BLACK);
n = min(cx, cy);
start = micros();
for (i = 0; i < n; i += 5)
{
tft.drawTriangle(
cx, cy - i, // peak
cx - i, cy + i, // bottom left
cx + i, cy + i, // bottom right
tft.color565(i, i, i));
}
return micros() - start;
}
unsigned long testFilledTriangles()
{
unsigned long start, t = 0;
int i, cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;
tft.fillScreen(ILI9341_BLACK);
start = micros();
for (i = min(cx, cy); i > 10; i -= 5)
{
start = micros();
tft.fillTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i,
tft.color565(0, i * 10, i * 10));
t += micros() - start;
tft.drawTriangle(cx, cy - i, cx - i, cy + i, cx + i, cy + i,
tft.color565(i * 10, i * 10, 0));
yield();
}
return t;
}
unsigned long testRoundRects()
{
unsigned long start;
int w, i, i2,
cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;
tft.fillScreen(ILI9341_BLACK);
w = min(tft.width(), tft.height());
start = micros();
for (i = 0; i < w; i += 6)
{
i2 = i / 2;
tft.drawRoundRect(cx - i2, cy - i2, i, i, i / 8, tft.color565(i, 0, 0));
}
return micros() - start;
}
unsigned long testFilledRoundRects()
{
unsigned long start;
int i, i2,
cx = tft.width() / 2 - 1,
cy = tft.height() / 2 - 1;
tft.fillScreen(ILI9341_BLACK);
start = micros();
for (i = min(tft.width(), tft.height()); i > 20; i -= 6)
{
i2 = i / 2;
tft.fillRoundRect(cx - i2, cy - i2, i, i, i / 8, tft.color565(0, i, 0));
yield();
}
return micros() - start;
}