Тема: Интернет часы ESP8266 + TFT 3'2 SPI
Основная статья - http://rcl-radio.ru/?p=67569
#include <NTPClient.h>
#include <ESP8266WiFi.h> 
#include <WiFiUdp.h>
#include <UTFT.h>
#include <SPI.h>
 WiFiUDP ntpUDP;
 NTPClient timeClient(ntpUDP, "pool.ntp.org", 21600);
 extern uint8_t BigFont[],SmallFont[];
 UTFT myGLCD ( ILI9341_S5P, 13, 14, 15, 0, 12 );//SDI (MOSI), SCK, CS, RESET, DC == D7 D5 D8 D3 D6
 const char *ssid     = "Keenetic-9009";
 const char *password = "32481975";
 String date_time;
 float sx,sy,osx,osy,mx,my,omx,omy,hx,hy,ohx,ohy;
 unsigned long times;
void setup(){
  Serial.begin(9600);
  WiFi.mode(WIFI_STA);WiFi.begin(ssid, password);
  while ( WiFi.status() != WL_CONNECTED ) {
    delay(500);Serial.print(".");
    timeClient.begin();}  
  myGLCD.InitLCD(0);myGLCD.fillRect(0,0,320,240);myGLCD.setFont(BigFont);myGLCD.clrScr(); // первоначальные настройки экрана
  myGLCD.fillScr(0x0000);myGLCD.setColor(0xffff);myGLCD.setBackColor(0x0000); 
   for(int i=0;i<360;i+=30){
    sx=cos((i-90)*0.0174532925);
    sy=sin((i-90)*0.0174532925);
    myGLCD.drawLine(sx*120+120,sy*120+120,sx*110+120,sy*110+120);}
   for(int i=0;i<360;i+=6){
    sx=cos((i-90)*0.0174532925);
    sy=sin((i-90)*0.0174532925);
    myGLCD.drawPixel(sx*115+120,sy*115+120);}
}
void loop(){
  if(millis()-times>=1000){times=millis();
   while(!timeClient.update()){timeClient.forceUpdate();}
 int hh = timeClient.getHours();
 int mm = timeClient.getMinutes();
 int ss = timeClient.getSeconds();
  date_time = timeClient.getFormattedDate();
 int index_date = date_time.indexOf("T");
 String date = date_time.substring(0, index_date);
  hx=cos(((hh*30+mm*6*0.08333333)-90)*0.0174532925);
  hy=sin(((hh*30+mm*6*0.08333333)-90)*0.0174532925);
  mx=cos(((mm*6+ss*6*0.01666667)-90)*0.0174532925);
  my=sin(((mm*6+ss*6*0.01666667)-90)*0.0174532925);
  sx=cos((ss*6-90)*0.0174532925);
  sy=sin((ss*6-90)*0.0174532925);
 myGLCD.setColor(0x0000);// clear
 myGLCD.drawLine(osx,osy,120,120);
 myGLCD.drawLine(omx,omy,120,120);
 myGLCD.drawLine(ohx,ohy,120,120); 
 myGLCD.setColor(0xffff);
 myGLCD.print("12",104,0);
 myGLCD.print("6",112,225);
 myGLCD.print("9",0,112);
 myGLCD.print("3",224,112);
  ohx = hx*70+120;
  ohy = hy*70+120;
  omx = mx*100+120;
  omy = my*100+120;  
  osx = sx*110+120;
  osy = sy*110+120;
 myGLCD.setColor(0xf000);
 myGLCD.drawLine(osx,osy,120,120);
 myGLCD.setColor(0xffff);
 myGLCD.drawLine(omx,omy,120,120);
 myGLCD.setColor(0xfff5);
 myGLCD.drawLine(ohx,ohy,120,120);
 myGLCD.setColor(0xf000);
 myGLCD.fillCircle(120,120,4);
 myGLCD.setColor(0xffff);
///////////////////////////////////////////////////////
 myGLCD.print(timeClient.getFormattedTime(),60,275);
 myGLCD.print(date,45,295);
  }
 }//loop