ESP8266-12E based NTP display

main.cpp

#include <Arduino.h>
#include <stdint.h>
#include <TFTv2.h>
#include <SPI.h>
#include <NTPClient.h>
// change next line to use with another board/shield
#include <ESP8266WiFi.h>
#include <WiFiUdp.h>

const char *ssid     = "<SSID>";
const char *password = "<PASSWORD>";

WiFiUDP ntpUDP;

// You can specify the time server pool and the offset (in seconds, can be
// changed later with setTimeOffset() ). Additionaly you can specify the
// update interval (in milliseconds, can be changed using setUpdateInterval() ).
NTPClient timeClient(ntpUDP, "north-america.pool.ntp.org", 3600, 60000);

void setup() {
  Serial.begin(115200);

  WiFi.begin(ssid, password);
  while ( WiFi.status() != WL_CONNECTED ) {
    delay ( 500 );
    Serial.print ( "." );
  }
  timeClient.begin();

  TFT_BL_ON;      //turn on the background light
  Tft.TFTinit();  //init TFT library
}

char *timetext;

void loop() {
  timeClient.update();

  timetext = strdup(timeClient.getFormattedTime().c_str());
  Serial.println(timetext);
  Tft.drawString(timetext,10,10,4,CYAN);   //at:(10, 10), size:4, color:CYAN
  free(timetext);

  delay(1000);
}

platform.ini

[env:esp12e]
platform = espressif8266
board = esp12e
framework = arduino

; NTPClient @https://github.com/arduino-libraries/NTPClient
; TFT_Touch_Shield_V2 @https://github.com/Seeed-Studio/TFT_Touch_Shield_V2/
lib_deps =
  NTPClient
  ILI9341