Hi real novice looking for help.
The tft is a cheap Chinese one with IC:ST7789V SPI on the box. Using a AZDelivery 4mb D1 Mini V3.
I have watched several videos and have been trying to get my screen to just run the graphics tests (tried the esp8266 with ST7789.h one and the ILI9341.h) both codes upload ok but I just get a white screen.
mosi 7
miso 6
clk 5
top of code ILI9341
#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"
// For the Adafruit shield, these are the default.
#define TFT_DC 1
#define TFT_CS 8
#define TFT_RST 2
// Use hardware SPI (on Uno, #13, #12, #11) and the above for CS/DC
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_RST);
// If using the breakout, change pins as desired
//Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK, TFT_RST, TFT_MISO);
void setup() {
Serial.begin(9600);
Serial.println("ILI9341 Test!");
top of code esp8266 test
#include <Adafruit_GFX.h> // Core graphics library
#include <Adafruit_ST7789.h> // Hardware-specific library for ST7789
#include <SPI.h>
#if defined(ARDUINO_FEATHER_ESP32) // Feather Huzzah32
#define TFT_CS 14
#define TFT_RST 15
#define TFT_DC 32
#elif defined(ESP8266)
#define TFT_CS 8
#define TFT_RST 2
#define TFT_DC 1
#else
// For the breakout board, you can use any 2 or 3 pins.
// These pins will also work for the 1.8" TFT shield.
#define TFT_CS 10
#define TFT_RST 9 // Or set to -1 and connect to Arduino RESET pin
#define TFT_DC 8
#endif
// OPTION 1 (recommended) is to use the HARDWARE SPI pins, which are unique
// to each board and not reassignable. For Arduino Uno: MOSI = pin 11 and
// SCLK = pin 13. This is the fastest mode of operation and is required if
// using the breakout board's microSD card.
// For 1.14", 1.3", 1.54", 1.69", and 2.0" TFT with ST7789:
Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_RST);
// OPTION 2 lets you interface the display using ANY TWO or THREE PINS,
// tradeoff being that performance is not as fast as hardware SPI above.
//#define TFT_MOSI 11 // Data out
//#define TFT_SCLK 13 // Clock out
// OR for the ST7789-based displays, we will use this call
// Adafruit_ST7789 tft = Adafruit_ST7789(TFT_CS, TFT_DC, TFT_MOSI, TFT_SCLK, TFT_RST);
float p = 3.1415926;
void setup(void) {
Serial.begin(9600);
Serial.print(F("Hello! ST77xx TFT Test"));
// OR use this initializer (uncomment) if using a 2.0" 320x240 TFT:
tft.init(240, 320); // Init ST7789 320x240
// SPI speed defaults to SPI_DEFAULT_FREQ defined in the library, you can override it here
// Note that speed allowable depends on chip and quality of wiring, if you go too fast, you
// may end up with a black screen some times, or all the time.
//tft.setSPISpeed(40000000);
Serial.println(F("Initialized"));
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Apologies in advance if I have done something stupid, I've been trying to get it to work on my own for over 10 hrs.
Thanks
