#include <Arduino.h>
#ifdef ESP32
  #include <WiFi.h>
#else
  #include <ESP8266WiFi.h>
#endif
#include <time.h>
#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
 
Adafruit_SSD1306 display = Adafruit_SSD1306(128, 64, &Wire, -1); 

 
int GMTOffset = 3600;  //Replace with your GMT Offset in seconds
int daylightOffset = 0;  //Replace with your daylight savings offset in seconds
 
void setup() {
Serial.begin(115200); 

if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { 
  Serial.println(F("SSD1306 allocation failed"));
  for(;;);
}
  delay(2000);
display.clearDisplay();
display.setTextSize(1); 
display.setCursor(0,0);
display.setTextColor(WHITE);

  // WiFi
  WiFi.begin("Wokwi-GUEST", "", 6);
  while (WiFi.status() != WL_CONNECTED) {
    delay(250);
  }
  Serial.println("");
  Serial.println("WiFi connected");
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
   
configTime(GMTOffset, daylightOffset, "pool.ntp.org","time.nist.gov");
}
void loop() {
  for (int a = 0 ; a < 6; a++ )
  {
time_t rawtime = time(nullptr);
struct tm* timeinfo = localtime(&rawtime);

int radius = 35;
display.drawCircle(display.width()/2, display.height()/2, 2, WHITE);
//draw clock
for( int i=0; i < 360;i= i + 30 ){
float angle = i ; 
angle=(angle/57.29577951) ; 
int x1=(64+(sin(angle)*radius));
int y1=(32-(cos(angle)*radius));
int x2=(64+(sin(angle)*(radius-5)));
int y2=(32-(cos(angle)*(radius-5)));
display.drawLine(x1,y1,x2,y2,WHITE);
}

//draw second hand
float angle = timeinfo->tm_sec*6 ;
angle=(angle/57.29577951) ; 
int x2=(64+(sin(angle)*(radius)));
int y2=(32-(cos(angle)*(radius)));
display.drawLine(64,32,x2,y2,WHITE);

// draw minute hand
angle = timeinfo->tm_min * 6 ;
angle=(angle/57.29577951) ; 
x2=(64+(sin(angle)*(radius-3)));
y2=(32-(cos(angle)*(radius-3)));
display.drawLine(64,32,x2,y2,WHITE);

// draw hour hand
angle = timeinfo->tm_hour * 30 + int((timeinfo->tm_min / 12) * 6 );
angle=(angle/57.29577951) ; 
x2=(64+(sin(angle)*(radius-11)));
y2=(32-(cos(angle)*(radius-11)));
display.drawLine(64,32,x2,y2,WHITE);
 
display.display();
delay(100);
display.clearDisplay();
}
 
}