euc-hud/test_ssd1306.cpp

#include <Arduino.h>
#include <BLEDevice.h>
#include <BLEServer.h>
#include <BLEUtils.h>
#include <BLE2902.h>
#include <Wire.h>
#include <U8g2lib.h>

// OLED Display Configuration - Alternative SSD1306 mode
#define OLED_SDA 21
#define OLED_SCL 22
#define OLED_RST 16
#define OLED_ADDR 0x3C

// BLE Configuration
#define SERVICE_UUID        "12345678-1234-1234-1234-123456789abc"
#define BATTERY_CHAR_UUID   "87654321-4321-4321-4321-cba987654321"
#define SPEED_CHAR_UUID     "11111111-2222-3333-4444-555555555555"
#define DEVICE_NAME         "mirror-hud"

// Try SSD1306 compatibility mode (comment out SSD1309 line above and use this)
U8G2_SSD1306_128X64_NONAME_F_HW_I2C u8g2(U8G2_R0, OLED_RST, OLED_SCL, OLED_SDA);

// Other variables and classes remain the same...
bool dataReceived = false;
float batteryLevel = 0.0;
float speed = 0.0;

void initDisplay() {
    Serial.println("=== TRYING SSD1306 MODE ===");
    
    Wire.begin(OLED_SDA, OLED_SCL);
    
    // Manual reset
    pinMode(OLED_RST, OUTPUT);
    digitalWrite(OLED_RST, LOW);
    delay(100);
    digitalWrite(OLED_RST, HIGH);
    delay(100);
    
    u8g2.begin();
    u8g2.clearBuffer();
    u8g2.setFont(u8g2_font_ncenB18_tr);
    u8g2.drawStr(15, 35, "tangerine");
    u8g2.sendBuffer();
    
    Serial.println("SSD1306 mode display initialized");
}

// Minimal main functions for testing
void setup() {
    Serial.begin(115200);
    delay(1000);
    Serial.println("Starting OLED test...");
    initDisplay();
}

void loop() {
    delay(1000);
}