ESP32 Hello World on LCD

Projects Programming
1

Hi

How to add the Hello World to be seen on LCD ?

#include <SPI.h>
#include "LCD_Driver.h"
////////////////////////////



#define IMAGE_BACKGROUND    WHITE
#define FONT_FOREGROUND     BLACK
#define FONT_BACKGROUND     WHITE
////////////////////////////

// Set these to your desired credentials.

int LCD;
int ledblink = 2;


void setup()
{
  pinMode(ledblink, OUTPUT);
  Config_Init();
  LCD_Init();
  Serial.begin(115200);
  // WiFi.begin(ssid,password);
  LCD_SetBacklight(180);
  //  Paint_NewImage(LCD_WIDTH, LCD_HEIGHT, 90, WHITE);
  // Paint_SetRotate(90);
  //////////////////////////////////////////////////
  // LCD_Clear(0xffff); //white
  // LCD_Clear(0xF800); // red
  LCD_Clear(MAGENTA); //  
  // LCD_Clear(0x07E0);  // green
  // LCD_Clear(0x001F ); //blue
  //////////////////////////////////////////////////////////
  
}


void loop() {
  
    //  LCD_Write("Hello World!");
  //LCD.print("hello, world!");
  
  digitalWrite(ledblink, HIGH);  // turn the LED on (HIGH is the voltage level)
  delay(1000);                      // wait for a second
  digitalWrite(ledblink, LOW);   // turn the LED off by making the voltage LOW
  delay(100);

}
2

How does the Example code for the LCD library do it?

That is where I looked first when I did it. Details? In the example!

1 Like
3

Answers to the following questions would be helpful also:

  • Where did you get your LCD driver from?
  • Which type of LCD display are you using?
  • How did you wired it?
1 Like
4

Examples (for RPi) seem to be in this zip...
https://files.waveshare.com/upload/8/8d/LCD_Module_RPI_code.zip

This seems to be the library...

The hardware seems to be the WaveShare 1.8"

5

Thank you for your advice, problem solved.

6

Excellent. What steps did you take to solve this?

7

I contacted the supplier and they sent me the code.

8

Did the supplier send a link? WaveShare link?

9

No, they send me just code

10

Is it useful to show the solution to your topic?

11 
#include <Adafruit_GFX.h>
#include <Adafruit_ST7789.h> // Or the specific library for your display
#include <SPI.h>
/*
    // Pin definitions for the display
    #define TFT_CS 10
    #define TFT_DC 7
    #define TFT_RST 8
    #define TFT_BL 9 // Backlight control
*/
//////////////
#define TFT_MOSI 23  // Data out
#define TFT_SCLK 18  // Clock out

#define TFT_CS   15// // Chip select pin
#define TFT_DC    2 // Data/Command pin
#define TFT_RST   4  // pin# 2
#define BL   32
//#define BL   -1
///////////////

// Initialize the TFT library with the correct pins and dimensions
Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RST);

void setup() {
  Serial.begin(115200); // Optional: for serial debugging
  Serial.println("Hello World!");
    pinMode(32, OUTPUT);
    digitalWrite(32, HIGH);
  // Initialize the display
  tft.init(170, 320); // Initialize with your screen dimensions
  //tft.setRotation(1); // 1 = HORIZONTAL,  Set screen rotation as needed (0, 1, 2, 3)
  tft.setRotation(3); // 3 = HORIZONTAL  upside down
  tft.fillScreen(ST77XX_BLUE);
  /*
    // Set text properties
    tft.setTextColor(ST77XX_WHITE);
    tft.setTextSize(2); // Set text size
    tft.setCursor(50, 150); // Set cursor position (x, y)

    // Print "Hello, World!"
    tft.println("Hello, World!");
  */
}

void loop() {
  // Set text properties
  tft.setTextColor(ST77XX_WHITE);
  tft.setTextSize(4); // Set text size
  tft.setCursor(0, 50); // Set cursor position (x, y)

  // Print "Hello, World!"
  tft.println("Hello, World!");
  // digitalWrite(32, HIGH);
  // delay(200);
  //digitalWrite(32, LOW);
}
1 Like
12

Aha, so the only difference from the code posted in the following thread:

is just the LCD backlight setting?

    pinMode(32, OUTPUT);
    digitalWrite(32, HIGH);

For the benefit of anyone experiencing similar issue, I recommend you clarifying the cause in the previous thread and this thread, and marking them as resolved.

13

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