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Basic Test run on  Waveshare ESP32-S3-Touch-LCD-4B , with built-in 4inch 480 × 480 resolution ST7701 RGB interface LCD. S3_ST7701_basictest.ino /* Basic test run on Waveshare ESP32-S3-Touch-LCD-4B https://coxxect.blogspot.com/2026/06/waveshare-esp32-s3-touch-lcd-4b-hello.html Remark about "USB CDC On Boot" option for Serial.print() If host PC connect to USB TO UART port (lower one), select USB CDC On Boot: "Disabled". If connect to ESP32-S3 USB Interface port (middle one), select USB CDC On Boot: "Enabled" Otherwise, you cannot see the output by Serial.print(). */ #include <Arduino.h> #include "Arduino_GFX_Library.h" #define BL 4 Arduino_XCA9554SWSPI *expander = new Arduino_XCA9554SWSPI( 7, 0, 2, 1, &Wire, 0x20); Arduino_ESP32RGBPanel *rgbpanel = new Arduino_ESP32RGBPanel( 17 /* DE */, 3 /* VSYNC */, 46 /* HSYNC */, 9 /* PCLK */, 10 /* B0 */, 11 /* B1 */, 12 /* B2 */, 13 /* B3 */, 14 /* B4 */, 21 ...

Prepare libraries to run HelloWorld on Waveshare ESP32-S3-Touch-AMOLED-2.16 , in Arduino framework. Following the steps in Waveshare docs, ESP32-S3-Touch-AMOLED-2.16 > Working with Arduino Notice: About display resolution: currently, both LCD_WIDTH and LCD_HEIGHT in libraries//Mylibrary/pin_config.h are set 466, have to set it 480 to match the actual resolution. The following exercise define LCD connection in code, so no need to #include "pin_config.h". S3_CO5300_basictest.ino /* Exercise run on ESP32-S3-Touch-AMOLED-2.16 https://coxxect.blogspot.com/2026/05/prepare-helloworld-for-waveshare-esp32.html Remark about "USB CDC On Boot" option for Serial.print() For Waveshare ESP32-S3-Touch-AMOLED-2.16 with a single USB port only, select USB CDC On Boot: "Enabled". Otherwise, you cannot see the output by Serial.print(). */ #include <Arduino.h> #include "Arduino_GFX_Library.h" // === #define LCD_SDIO0 4...

To install the Arduino IDE 2.3.8 on Linux Mint using the AppImage format, tested on Linux Mint 22.3 Xfce over VirtualBox on Windows 11. Step 1: Download the AppImage - Go to the official Arduino Software page . - Look for Arduino IDE 2.3.8 (or the latest version). - Click on the "Linux AppImage 64 bits" link to download the file. - You can move the downloaded file to other folder you want. Step 2: Grant Execution Permission By default, Linux treats downloaded AppImages as non-executable files for security. You must enable execution rights. Option A: Using the Terminal (Recommended) Open your terminal and navigate to the folder contain the downloaded file: chmod +x arduino-ide_2.3.8_Linux_64bit.AppImage Option B: Using the GUI - Right-click the downloaded .AppImage file. - Select Properties. - Go to the Permissions tab. - Check the box that says "Allow executing file as program". Step 3: Configure Serial Port Permissions (dialout) In Linux, your user accou...

Exercise run on Waveshare ESP32-C5-WIFI6-KIT-N16R8 to control onboard RGB LED using Adafruit_NeoPixel library. ESP32C5_RGB.ino /* Exercise run on Waveshare ESP32-C5-WIFI6-KIT-N16R8 to control onboard RGB LED using Adafruit_NeoPixel library. The onboard RGB on Waveshare ESP32-C5-WIFI6-KIT-N16R8 is connected to GPIO27. https://coxxect.blogspot.com/2026/02/waveshare-esp32-c5-wifi6-kit-n16r8-to.html */ #include <Adafruit_NeoPixel.h> // Pin where the onboard RGB is connected #define LED_PIN 27 // Number of LEDs (number of onboard RGB is 1) #define LED_COUNT 1 // Create NeoPixel object Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_RGB + NEO_KHZ800); void setup() { strip.begin(); // Initialize NeoPixel library strip.show(); // Turn OFF all pixels ASAP strip.setBrightness(50); // Adjust brightness (0–255) } void loop() { // Cycle through Red, Green, Blue strip.setPixelColor(0, strip.Color(255, 0, 0)); // Red strip.show(); delay(100...

Raspberry Pi Pico 2 W display on two 1.9" 170*320 ST7789 SPI LCD, using Arduino_GFX_Library, using separated SPI. In previous exercise, I used a Raspberry Pi Pico 2 W to drive two LCDs: a 2.4-inch and a 2.0-inch 240×320 ST7789 SPI IPS . Both displays shared a common SPI bus without any problems. However, when I replaced them with two 1.9-inch 170×320 ST7789 SPI LCDs , the setup did not work. Using the same code and connections, only the second LCD would turn on. To solve this, I separated the SPI connections for the two displays: the first one (on the left) is connected via Arduino_RPiPicoSPI, and the second one (on the right) is connected via Arduino_SWSPI. Updated connection: Raspberry Pi Pico 2 W      GP28| LCD2_RST -----------------+      GND | |      GP27| LCD2_DC ----------------+ |      GP26| LCD2_CS --------------+ | |      Run | ...

Raspberry Pi Pico 2 W display on dual LCD using Arduino_GFX_Library.  - 2.4 inch 240×320 ST7789 SPI IPS - 2.0 inch 240x320 ST7789 SPI IPS Connection: Connection ==========      Raspberry Pi Pico 2 W | GP28| ------- LCD2_RST -----------------+      GND | |      GP27| ------- LCD2_DC ----------------+ |      GP26| ------- LCD2_CS --------------+ | |      Run | | | |      GP22| ------- LCD_RST ------+ | | |      GND | | | | |      GP21| ------- LCD_DC -------|-+ | | |      GP20| ------- LCD_BL -------|-|---+ | | |      GP19| MOSI - SPI_SDA ----+ | | | | | |      GP18| SCK - SPI_SCL --+ | | | | | | |      GND |      | | | | | | | |      GP17| SS - LCD_CS ---|-|-|-|-+ | | | ...

This video show steps how Xiao ESP32S3 display on 1.54" 240*240 ST7789 SPI LCD using TFT_eSPI in Arduino Framework. Connection: ST7789V2 Xiao ESP32S3 ---------------------------- GND GND VCC 3V3 SCL GPIO7 SDA GPIO9 RES GPIO1 DC GPIO2 CS GPIO3 BLK GPIO4 FT6236 ---------------------------- SCL GPIO6 SDA GPIO5 INT GPIO43 (Not used) RST GPIO44 Library used: TFT_eSPI  https://github.com/Bodmer/TFT_eSPI To setup, scroll down to "Tips" section: Create a new folder in your Arduino library folder called "TFT_eSPI_Setups". You then place your custom setup.h files in there. Edit the User_Setup_Select.h file to point to your custom setup file. Create my custom setup file, Setup_ST7789_XIAOESP32S3.h , under TFT_eSPI_Setups folder. // Setup_ST7789_XIAOESP32S3.h in // ..\Arduino\libraries\TFT_eSPI_Setups\ // // Modify // ..\Arduino\libraries\TFT_eSPI\User_Setup_Select.h to load it. // #include <../TFT_eSPI_Setups/Setup_ST7789_XIAOESP32S3.h> #de...

Exercise run on  Xiao ESP32S3 Sense in Arduino framework, read SD Card. Base on the exercise " 240x240 ST7789V2 SPI IPS with FT6236 cap touch on XIAO ESP32S3 using GFX Library for Arduino ", display ST7789 LCD. XiaoS3_ST7789_SD.ino , read and display SD info and hello.txt content. /******************************************************************************* Xiao ESP32S3 Sense exercise ******************************************************************************/ /******************************************************************************* * Start of Arduino_GFX setting ******************************************************************************/ #include <Arduino_GFX_Library.h> //=== Custom to match my connection =========================================== #define PIN_BLK 4 #define PIN_CS 3 #define PIN_DC 2 #define PIN_RES 1 #define PIN_SDA 9 #define PIN_SCL 7 #define GFX_BL PIN_BLK #define CTP_INT 43 #define CTP_RST 44 #define FT6236_AD...