/*
 * ============================================================
 *  Tishvi ESP32 (30-pin / 38-pin) — Getting Started Sketch
 *  guide.tishvi.com
 * ============================================================
 *  Works on both Tishvi ESP32 variants:
 *    ● 30-pin (15 pins per side)
 *    ● 38-pin (19 pins per side)
 *
 *  What this sketch does:
 *    1. Prints chip information to Serial Monitor
 *    2. Scans for nearby WiFi networks and lists them
 *    3. Blinks the built-in LED (GPIO 2) every 500 ms
 *
 *  ⚠ IMPORTANT:
 *    Open Serial Monitor at 115200 baud (NOT 9600 like Arduino UNO)
 *
 *  Board settings in Arduino IDE:
 *    Board       : ESP32 Dev Module
 *    Upload Speed: 921600
 *    Port        : Your COM port (Windows) or /dev/ttyUSBx (Linux/macOS)
 *
 *  No external libraries needed — WiFi.h is included with the
 *  ESP32 board package from Espressif.
 * ============================================================
 */

#include <WiFi.h>

// ── Pin Definitions ──────────────────────────────────────────
const int LED_PIN = 2;    // Built-in LED — GPIO 2 on most ESP32 boards
                          // If your LED does not blink, try GPIO 13

void printChipInfo() {
  Serial.println("========================================");
  Serial.println("  Tishvi ESP32 — Getting Started");
  Serial.println("========================================");
  Serial.printf("  Chip Model   : %s\n", ESP.getChipModel());
  Serial.printf("  Chip Revision: v%d.%d\n",
                ESP.getChipRevision() / 100,
                ESP.getChipRevision() % 100);
  Serial.printf("  CPU Cores    : %d\n", ESP.getChipCores());
  Serial.printf("  CPU Frequency: %d MHz\n", ESP.getCpuFreqMHz());
  Serial.printf("  Flash Size   : %d MB\n", ESP.getFlashChipSize() / (1024 * 1024));
  Serial.printf("  Free Heap    : %d bytes\n", ESP.getFreeHeap());
  Serial.printf("  MAC Address  : %s\n", WiFi.macAddress().c_str());
  Serial.println("========================================");
  Serial.println();
}

void scanWiFi() {
  Serial.println("Scanning for WiFi networks...");
  WiFi.mode(WIFI_STA);
  WiFi.disconnect();
  delay(100);

  int n = WiFi.scanNetworks();   // Blocks until scan is complete

  if (n == 0) {
    Serial.println("No networks found. Check antenna is intact.");
  } else {
    Serial.printf("%d network(s) found:\n\n", n);
    for (int i = 0; i < n; i++) {
      Serial.printf("  %2d. %-32s  Signal: %4d dBm  %s\n",
        i + 1,
        WiFi.SSID(i).c_str(),
        WiFi.RSSI(i),
        (WiFi.encryptionType(i) == WIFI_AUTH_OPEN) ? "[Open]" : "[Secured]"
      );
      delay(10);
    }
  }
  Serial.println();
  WiFi.scanDelete();   // Free scan memory
}

void setup() {
  Serial.begin(115200);    // ⚠ ESP32 uses 115200, not 9600
  delay(500);

  pinMode(LED_PIN, OUTPUT);

  // Print chip info and scan WiFi once at startup
  printChipInfo();
  scanWiFi();

  Serial.println("Built-in LED (GPIO 2) will now blink every 500 ms.");
  Serial.println("If no blink: check LED_PIN at top of sketch.");
}

void loop() {
  // ── Blink built-in LED ───────────────────────────────────
  digitalWrite(LED_PIN, HIGH);
  delay(500);
  digitalWrite(LED_PIN, LOW);
  delay(500);
}