New LCD screen won't light up

Other Hardware Displays
1

I just bought one of these LCDs.
https://www.aliexpress.us/item/2255799816264653.html?spm=a2g0o.order_list.order_list_main.4.42d01802kpCams&gatewayAdapt=glo2usa&_randl_shipto=US

I got the 7-pin SPI version. I wired it up to my arduino nano, and nothing. Nothing lights up. I tried this code:

#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <SPI.h>

#define OLED_CS 10
#define OLED_DC 9
#define OLED_RESET 8

Adafruit_SSD1306 display(OLED_RESET);

void setup() {
  // initialize the SPI bus
  SPI.begin();
  SPI.setClockDivider(SPI_CLOCK_DIV4);

  // initialize the SSD1309 display
  display.begin(SSD1306_SWITCHCAPVCC, OLED_CS, OLED_DC, OLED_RESET);

  // add a delay to give the display time to initialize
  delay(1000);

  // clear the display buffer
  display.clearDisplay();

  // set text size and color
  display.setTextSize(2);
  display.setTextColor(WHITE);

  // print some text
  display.setCursor(0, 0);
  display.println("Hello, world!");
  display.display();
}

void loop() {
  // nothing to do here
}

and still nothing. The documentation is in the description on the aliexpress site. It doesn't state what drivers to use. ChatGPT suggested using these libraries:

#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <SPI.h>

What am i doing wrong here? The wiring all seems good. I've tried VDD to 3.3V and 5V. VSS to GND. But still nothing.

2

That display has a SSD1309 driver .

3

According to amazon's q&a, it can use SSD1306 drivers.

4

if you do a search , you'll find quite several similar problems and how to address the cure. :face_with_raised_eyebrow:

5

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