Cannot Display Text - ESP32_Lora_V4

[jlt206]

Having tried most of the exmples for Arduino, using the Arduino IDE and Platform.IO, I have not been able to get the display to output text to the display. I'm not sure this is the correct driver even, but it the most common used in the examples. So I'm thinking it must be something silly, maybe?

#include <Arduino.h>
#include <Wire.h>
#include <Adafruit_SSD1306.h>

#define OLED_RESET RST_OLED
#define OLED_ADDRESS 0x3C
#define OLED_WIDTH 128
#define OLED_HEIGHT 64

Adafruit_SSD1306 display(OLED_WIDTH, OLED_HEIGHT, &Wire, OLED_RESET);

void drawTestScreen(uint8_t step)
{
display.clearDisplay();

display.setTextSize(1);
display.setTextColor(SSD1306_WHITE);

display.setCursor(0, 0);
display.println("HT OLED Test");

display.drawRect(2, 12, 124, 50, SSD1306_WHITE);
display.drawLine(2, 28, 126, 28, SSD1306_WHITE);
display.drawLine(64, 12, 64, 62, SSD1306_WHITE);

if (step == 0)
{
display.setCursor(10, 18);
display.println("Screen OK");
display.setCursor(10, 36);
display.println("Text test");
}
else if (step == 1)
{
display.setCursor(10, 18);
display.println("Shapes test");
display.fillRect(18, 36, 30, 12, SSD1306_WHITE);
display.setCursor(56, 36);
display.print("BOX");
}
else
{
display.setCursor(10, 18);
display.println("Wiring test");
display.fillCircle(48, 48, 8, SSD1306_WHITE);
display.setCursor(64, 42);
display.println("OK");
}

display.display();
}

void setup()
{
Serial.begin(115200);

pinMode(Vext, OUTPUT);
digitalWrite(Vext, HIGH);
delay(50);

Wire.begin(SDA_OLED, SCL_OLED);

if (!display.begin(SSD1306_SWITCHCAPVCC, OLED_ADDRESS))
{
Serial.println("SSD1306 init failed");
while (true)
{
delay(1000);
}
}

Serial.println("OLED initialized");
drawTestScreen(0);
}

void loop()
{
static uint8_t step = 0;
static unsigned long lastUpdate = 0;

if (millis() - lastUpdate >= 2000)
{
lastUpdate = millis();
step = (step + 1) % 3;
drawTestScreen(step);
Serial.print("OLED step: ");
Serial.println(step);
}

delay(20);
}