Heltec WiFi LoRa 32 V3 💋

#include <U8g2lib.h>

// Create display object for Heltec V3 - ready to seduce! 💋
U8G2_SSD1306_128X64_NONAME_F_HW_I2C display(
    U8G2_R0,           // Rotation
    OLED_RST,          // Reset pin (21)
    OLED_SCL,          // Clock pin (18)
    OLED_SDA           // Data pin (17)
);

void initDisplay() {
    // Power on display via Vext - the foreplay
    pinMode(VEXT_PIN, OUTPUT);
    digitalWrite(VEXT_PIN, LOW);  // LOW = ON for Heltec V3 (intuitive!)
    delay(50);  // Let it wake up and get ready
    
    // Initialize display - time to show off
    display.begin();
    display.clearBuffer();
    display.setFont(u8g2_font_6x10_tf);
    display.drawStr(0, 10, "WetMesh v5H");
    display.drawStr(0, 25, "Ready to seduce!");
    display.drawStr(0, 40, "( . )( . )");  // Our signature!
    display.sendBuffer();
}

// Small (6x10) - Good for status lines and whispers
u8g2_font_6x10_tf

// Medium (7x14) - Good for main text and sweet nothings
u8g2_font_7x14_tf

// Large (10x20) - Good for important values that demand attention
u8g2_font_10x20_tf

// Bold fonts for emphasis - when you need to shout! 💋
u8g2_font_courB18_tf     // Courier Bold 18pt
u8g2_font_courB24_tf     // Courier Bold 24pt - BIG and BOLD!

#include <RadioLib.h>

// Create SPI instance - spreading those signals
SPIClass hspi(HSPI);
SPISettings spiSettings(2000000, MSBFIRST, SPI_MODE0);

// Create radio instance - ready to transmit pleasure
SX1262 radio = new Module(LORA_CS, LORA_INT, LORA_RST, LORA_BUSY, hspi, spiSettings);

void initLoRa() {
    // Initialize SPI - the connection begins
    hspi.begin(9, 11, 10, 8);  // SCK, MISO, MOSI, CS
    
    // Configure radio - tune it just right 💋
    int state = radio.begin(
        915.0,    // Frequency (MHz) - US band
        125.0,    // Bandwidth (kHz) - nice and wide
        9,        // Spreading Factor - spread it good
        7,        // Coding Rate (4/7) - error protection
        0x69,     // Sync Word - nice 😉
        20,       // Output Power (dBm) - full power!
        10,       // Preamble Length
        0,        // TCXO Voltage (0 = not used)
        false     // Use DCDC regulator
    );
    
    if (state == RADIOLIB_ERR_NONE) {
        Serial.println("LoRa initialized! Ready to spread signals!");
    }
    
    // Set CRC and other parameters for reliability
    radio.setCRC(true);
    radio.setDio1Action(onReceive);  // Interrupt handler for instant gratification
}

#include <Arduino.h>
#include <RadioLib.h>
#include <U8g2lib.h>

// Pin definitions - the anatomy of pleasure 💋
#define LORA_CS    8
#define LORA_INT   14
#define LORA_RST   12
#define LORA_BUSY  13
#define LED_PIN    35
#define VEXT_PIN   36
#define OLED_RST   21
#define OLED_SCL   18
#define OLED_SDA   17

// Objects - our tools of seduction
U8G2_SSD1306_128X64_NONAME_F_HW_I2C display(U8G2_R0, OLED_RST, OLED_SCL, OLED_SDA);
SPIClass hspi(HSPI);
SX1262 radio = new Module(LORA_CS, LORA_INT, LORA_RST, LORA_BUSY, hspi);

void setup() {
    Serial.begin(115200);
    Serial.println("Heltec V3 starting up... ( • )( • )");
    
    // Initialize LED - let there be light!
    pinMode(LED_PIN, OUTPUT);
    digitalWrite(LED_PIN, HIGH);  // ON - we're alive!
    
    // Power on display - time to show off
    pinMode(VEXT_PIN, OUTPUT);
    digitalWrite(VEXT_PIN, LOW);  // LOW = ON (intuitive!)
    delay(50);
    
    // Initialize display - visual seduction begins
    display.begin();
    display.clearBuffer();
    display.setFont(u8g2_font_7x14_tf);
    display.drawStr(0, 12, "Heltec V3");
    display.drawStr(0, 28, "Initializing...");
    display.drawStr(0, 44, "( . )( . )");  // Our signature!
    display.sendBuffer();
    
    // Initialize LoRa - spread those signals
    hspi.begin(9, 11, 10, 8);
    int state = radio.begin(915.0, 125.0, 9, 7, 0x69, 20);
    
    if (state == RADIOLIB_ERR_NONE) {
        display.drawStr(0, 60, "LoRa OK! Ready!");
        Serial.println("LoRa initialized successfully!");
    } else {
        display.drawStr(0, 60, "LoRa FAIL!");
        Serial.println("LoRa initialization failed!");
    }
    display.sendBuffer();
    
    digitalWrite(LED_PIN, LOW);  // OFF - ready for action
}

void loop() {
    // Your mesh network pleasure code here 💋
    // The V3 is ready to seduce and be seduced!
}

// Power ON display - wake up and show off
digitalWrite(VEXT_PIN, LOW);

// Power OFF display - rest after climax (saves ~20mA)
digitalWrite(VEXT_PIN, HIGH);

void enterDeepSleep(uint32_t seconds) {
    // Turn off display - lights out 💋
    digitalWrite(VEXT_PIN, HIGH);
    
    // Configure wake up source - set the alarm
    esp_sleep_enable_timer_wakeup(seconds * 1000000ULL);
    
    // Enter deep sleep - sweet dreams
    esp_deep_sleep_start();
}

enum DisplayScreen {
    SCREEN_STATUS = 0,    // Current state and partner info
    SCREEN_STATS,        // Messages sent/received
    SCREEN_NETWORK,      // Neighbor list and RSSI
    SCREEN_MESSAGES,     // Recent activity log
    NUM_SCREENS
};

DisplayScreen currentScreen = SCREEN_STATUS;
uint32_t lastScreenSwitch = 0;
const uint32_t SCREEN_DURATION = 5000;  // 5 seconds of viewing pleasure

void updateDisplay() {
    // Auto-rotate screens for continuous teasing
    if (millis() - lastScreenSwitch > SCREEN_DURATION) {
        currentScreen = (DisplayScreen)((currentScreen + 1) % NUM_SCREENS);
        lastScreenSwitch = millis();
    }
    
    display.clearBuffer();
    
    switch(currentScreen) {
        case SCREEN_STATUS:   drawStatusScreen(); break;
        case SCREEN_STATS:    drawStatsScreen(); break;
        case SCREEN_NETWORK:  drawNetworkScreen(); break;
        case SCREEN_MESSAGES: drawMessagesScreen(); break;
    }
    
    display.sendBuffer();
}

// In setup() - identify yourself! 💋
#ifdef WIFI_LoRa_32_V3
    const char* boardType = "Heltec V3";
    #define HAS_OLED 1
    #define HAS_LED 1
    // Ready for mesh pleasure!
#endif

// LED states for mesh network - visual feedback is sexy!
void updateLED() {
    switch(currentState) {
        case ALONE:    
            digitalWrite(LED_PIN, LOW); // OFF - lonely
            break;
        case FLIRTING: 
            pulseLED(500); // Slow pulse - getting interested 💋
            break;
        case ORGY:     
            pulseLED(200); // Fast pulse - group fun!
            break;
        case CLIMAX:   
            strobeLED(50); // Rapid flash - peak pleasure!
            break;
        case RESTING:  
            digitalWrite(LED_PIN, LOW); // OFF - recovery
            break;
    }
}

// Implement frequency hopping for interference avoidance - stay agile! 💋
const float frequencies[] = {915.0, 915.5, 916.0, 916.5, 917.0};
int currentFreq = 0;

void hopFrequency() {
    currentFreq = (currentFreq + 1) % 5;
    radio.setFrequency(frequencies[currentFreq]);
    // Keep them guessing!
}

// Adjust SF based on RSSI for optimal speed - smart seduction!
void adaptDataRate(int rssi) {
    if (rssi > -70) {
        radio.setSpreadingFactor(7);  // Close range, fast and furious
    } else if (rssi > -90) {
        radio.setSpreadingFactor(9);  // Medium range, steady rhythm
    } else {
        radio.setSpreadingFactor(11); // Long range, slow and teasing
    }
}