#include <ESP8266WiFi.h>

#define WIFI_SSID "happy_2.4G"
#define WIFI_PASS "0816599222"

// กำหนดตัวแปรสำหรับแต่ละงาน
unsigned long previousLedMillis = 0;
unsigned long previousSerialMillis = 0;

const long ledInterval = 500;       // LED กระพริบทุก 500ms
const long serialInterval = 10000;  // ส่งข้อมูลทุก 10 วินาที

bool ledState = false;

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
  Serial.begin(115200);
  delay(2000);  //  รอความพร้อมของ Serial Monitor
}

void loop() {
  unsigned long currentMillis = millis();

  // งานที่ 1: LED กระพริบ
  if (currentMillis - previousLedMillis >= ledInterval) {
    previousLedMillis = currentMillis;
    ledState = !ledState;
    digitalWrite(LED_BUILTIN, ledState);
  }

  // งานที่ 2: ส่งข้อมูลผ่าน Serial
  if (currentMillis - previousSerialMillis >= serialInterval) {
    previousSerialMillis = currentMillis;

    Serial.println("\n--- ESP8266 Device Info ---");

    // Chip ID
    Serial.print("Chip ID: ");
    Serial.println(ESP.getChipId());

    // Flash Chip ID
    Serial.print("Flash Chip ID: ");
    Serial.println(ESP.getFlashChipId());

    // Flash Chip Size
    Serial.print("Flash Chip Size: ");
    Serial.print(ESP.getFlashChipSize() / 1024);
    Serial.println(" KB");

    // Flash Chip Real Size
    Serial.print("Flash Chip Real Size: ");
    Serial.print(ESP.getFlashChipRealSize() / 1024);
    Serial.println(" KB");

    // Sketch Size
    Serial.print("Sketch Size: ");
    Serial.print(ESP.getSketchSize() / 1024);
    Serial.println(" KB");

    // Free Sketch Space
    Serial.print("Free Sketch Space: ");
    Serial.print(ESP.getFreeSketchSpace() / 1024);
    Serial.println(" KB");

    // CPU Frequency
    Serial.print("CPU Frequency: ");
    Serial.print(ESP.getCpuFreqMHz());
    Serial.println(" MHz");

    // Free Heap Memory
    Serial.print("Free Heap Memory: ");
    Serial.print(ESP.getFreeHeap() / 1024);
    Serial.println(" KB");

    // Reset Reason
    Serial.print("Reset Reason: ");
    Serial.println(ESP.getResetReason());

    // MAC Address (requires WiFi.h)
    Serial.print("MAC Address: ");
    Serial.println(WiFi.macAddress());

    // Local IP Address (if connected to Wi-Fi)
    // You would typically connect to Wi-Fi first to get a local IP
    // For demonstration, we'll just print it if available.
    if (WiFi.status() == WL_CONNECTED) {
      Serial.print("Local IP Address: ");
      Serial.println(WiFi.localIP());
    } else {
      //Serial.println("Not connected to Wi-Fi, no local IP available.");
      
      Serial.println("Connecting to WiFi...");
      WiFi.begin(WIFI_SSID, WIFI_PASS);

      // รอ WiFi ต่อจนได้ IP
      while (WiFi.status() != WL_CONNECTED) {
        delay(300);
        Serial.print(".");
      }
      Serial.println();
      Serial.print("IP address: ");
      Serial.println(WiFi.localIP());
    }
  }
}