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By uosvald
Hey there!

I am currently working on a small project with the SparkFun ESP8266 ( I have connected the shield to the Arduino Uno and subsequently also connected a few sensors (soil moisture, temperature and a photo resistor). Since I want to use this data and store it in an sqlite database, it would be really handy if I could comply it with a date/timestamp. In order to do that I tried the Time library ( and It already comes with a TimeNTP_ESP8266WiFi example, but unfortunately it does not work. It seems that it is meant for the older version of the ESP8266 (#include <ESP8266WiFi.h> and not #include <SoftwareSerial.h> #include <SparkFunESP8266WiFi.h> like it is meant for the new shield).

I tried to modify the to example code so that it would work with the #include <SoftwareSerial.h> #include <SparkFunESP8266WiFi.h>. I managed to debug it, so that there are no errors, connect it to the network (blue light on), but it just does not print anything to the Serial monitor (except "Ti").

I am attaching the code below. Any help or ideas would be greatly appreciated. Is there maybe an easier way of getting a timestamp?

Code: Select all

#include <TimeLib.h>
#include <SoftwareSerial.h> 
#include <SparkFunESP8266WiFi.h>
#include <WiFiUdp.h>
#include <SPI.h>

const char ssid[] = "FRITZ!Box 6360 Cable";  //  your network SSID (name)
const char pass[] = "0611514476039497";       // your network password

// NTP Servers:
static const char ntpServerName[] = "";
//static const char ntpServerName[] = "";
//static const char ntpServerName[] = "";
//static const char ntpServerName[] = "";
//static const char ntpServerName[] = "";

const int timeZone = 1;     // Central European Time
//const int timeZone = -5;  // Eastern Standard Time (USA)
//const int timeZone = -4;  // Eastern Daylight Time (USA)
//const int timeZone = -8;  // Pacific Standard Time (USA)
//const int timeZone = -7;  // Pacific Daylight Time (USA)

WiFiUDP Udp;
unsigned int localPort = 8888;  // local port to listen for UDP packets

time_t getNtpTime();
void digitalClockDisplay();
void printDigits(int digits);
void sendNTPpacket(IPAddress &address);

void setup()
  //while (!Serial) ; // Needed for Leonardo only
  Serial.println("TimeNTP Example");
  Serial.print("Connecting to ");
  esp8266.connect(ssid, pass);

  int test = esp8266.begin();
  if (test != true)
    Serial.println(F("Error talking to ESP8266."));

  Serial.print("IP number assigned by DHCP is ");
  Serial.println("Starting UDP");
  Serial.print("Local port: ");
  Serial.println("waiting for sync");

time_t prevDisplay = 0; // when the digital clock was displayed

void loop()
  if (timeStatus() != timeNotSet) {
    if (now() != prevDisplay) { //update the display only if time has changed
      prevDisplay = now();

void digitalClockDisplay()
  // digital clock display of the time
  Serial.print(" ");

void printDigits(int digits)
  // utility for digital clock display: prints preceding colon and leading 0
  if (digits < 10)

/*-------- NTP code ----------*/

const int NTP_PACKET_SIZE = 48; // NTP time is in the first 48 bytes of message
byte packetBuffer[NTP_PACKET_SIZE]; //buffer to hold incoming & outgoing packets

time_t getNtpTime()
  IPAddress ntpServerIP; // NTP server's ip address

  while (Udp.parsePacket() > 0) ; // discard any previously received packets
  Serial.println("Transmit NTP Request");
  // get a random server from the pool
  Serial.print(": ");
  uint32_t beginWait = millis();
  while (millis() - beginWait < 1500) {
    int size = Udp.parsePacket();
    if (size >= NTP_PACKET_SIZE) {
      Serial.println("Receive NTP Response");, NTP_PACKET_SIZE);  // read packet into the buffer
      unsigned long secsSince1900;
      // convert four bytes starting at location 40 to a long integer
      secsSince1900 =  (unsigned long)packetBuffer[40] << 24;
      secsSince1900 |= (unsigned long)packetBuffer[41] << 16;
      secsSince1900 |= (unsigned long)packetBuffer[42] << 8;
      secsSince1900 |= (unsigned long)packetBuffer[43];
      return secsSince1900 - 2208988800UL + timeZone * SECS_PER_HOUR;
  Serial.println("No NTP Response :-(");
  return 0; // return 0 if unable to get the time

// send an NTP request to the time server at the given address
void sendNTPpacket(IPAddress &address)
  // set all bytes in the buffer to 0
  memset(packetBuffer, 0, NTP_PACKET_SIZE);
  // Initialize values needed to form NTP request
  // (see URL above for details on the packets)
  packetBuffer[0] = 0b11100011;   // LI, Version, Mode
  packetBuffer[1] = 0;     // Stratum, or type of clock
  packetBuffer[2] = 6;     // Polling Interval
  packetBuffer[3] = 0xEC;  // Peer Clock Precision
  // 8 bytes of zero for Root Delay & Root Dispersion
  packetBuffer[12] = 49;
  packetBuffer[13] = 0x4E;
  packetBuffer[14] = 49;
  packetBuffer[15] = 52;
  // all NTP fields have been given values, now
  // you can send a packet requesting a timestamp:
  Udp.beginPacket(address, 123); //NTP requests are to port 123
  Udp.write(packetBuffer, NTP_PACKET_SIZE);

void errorLoop(int error)
  Serial.print(F("Error: ")); Serial.println(error);
  Serial.println(F("Looping forever."));
  for (;;)