![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2018\/07\/NTPClient-ESP32-featured.jpg?resize=1200%2C675&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nNote: <\/strong> there’s an easier and updated guide to get date and time with the ESP32 with the pre-installed time.h library: ESP32 NTP Client-Server: Get Date and Time (Arduino IDE)<\/a>.<\/p>\n\n\n\n Before proceeding with this tutorial you should have the ESP32 add-on installed in your Arduino IDE. Follow one of the following tutorials to install the ESP32 on the Arduino IDE, if you haven\u2019t already.<\/p>\n\n\n\n IMPORTANT<\/strong>: we’re not using the default NTPClient library. To follow this tutorial you need to install the library we recommend using the following steps.<\/p>\n\n\n\n The easiest way to get date and time from an NTP server is using an NTP Client library. For that we\u2019ll be using the NTP Client library forked by Taranais<\/a>. Follow the next steps to install this library in your Arduino IDE:<\/p>\n\n\n\n Here we provide a sample code to get date and time from the NTP Server. This example was modified from one of the library examples.<\/p>\n\n\n View raw code<\/a><\/p>\n\n\n\n To get more NTP examples, in the Arduino IDE, go to File <\/strong>> Examples <\/strong>> NTPClient<\/strong>.<\/p>\n\n\n\n Let\u2019s take a quick look at the code to see how it works. First, you include the libraries to connect to Wi-Fi and get time and create an NTP client.<\/p>\n\n\n\n Type your network credentials in the following variables, so that the ESP32 is able to establish an Internet connection and get date and time from the NTP server.<\/p>\n\n\n\n The following two lines define an NTP Client to request date and time from an NTP server.<\/p>\n\n\n\n Then, initialize String<\/em> variables to save the date and time.<\/p>\n\n\n\n In the setup()<\/span> you initialize the Serial communication at baud rate 115200 to print the results:<\/p>\n\n\n\n These next lines connect the ESP32 to your router.<\/p>\n\n\n\n Next, initialize the NTP client to get date and time from an NTP server.<\/p>\n\n\n\n You can use the setTimeOffset()<\/span> method to adjust the time for your timezone in seconds.<\/p>\n\n\n\n Here are some examples for different timezones:<\/p>\n\n\n\n These next lines ensure that we get a valid date and time:<\/p>\n\n\n\n Note:<\/strong> sometimes the NTP Client retrieves 1970. To ensure that doesn\u2019t happen we need to force the update.<\/p>\n\n\n\n Then, convert the date and time to a readable format with the getFormattedDate()<\/span> method:<\/p>\n\n\n\n The date and time are returned in the following format:<\/p>\n\n\n\n If you want to get date and time separately, you need to split that string. The “T” letter separates the date from the time, so we can easily split that String. That\u2019s what we do in these next lines.<\/p>\n\n\n\n The date is saved on the dayStamp<\/span> variable, and the time on the timeStamp<\/span> variable.The time is requested and printed in every second.<\/p>\n\n\n\n Upload the code to the ESP32. Make sure you have the right board and COM port selected. After uploading the code, press the ESP32 “Enable” button, and you should get the date and time every second as shown in the following figure.<\/p>\n\n\n In this tutorial we\u2019ve shown you how to easily get date and time with the ESP32 on the Arduino IDE using an NTP server. The code provided is not useful by itself. The idea is to use the example provided in this guide in your own projects to timestamp your sensor readings.<\/p>\n\n\n\n This method only works if the ESP32 is connected to the Internet. If your project doesn\u2019t have access to the internet, you need to use other method. You can use an RTC module like the DS1307<\/a>.<\/p>\n\n\n\n We have other tutorials related with ESP32 that you may also like:<\/p>\n\n\n\n Thanks for reading.<\/p>\n","protected":false},"excerpt":{"rendered":" In this tutorial we\u2019ll show you how to get date and time using the ESP32 and Arduino IDE. Getting date and time is especially useful in data logging to timestamp … <\/p>\n\n
NTP Client Library<\/h2>\n\n\n\n
\n
Getting Date and Time from NTP Server<\/h2>\n\n\n\n
\/*********\n Rui Santos\n Complete project details at https:\/\/randomnerdtutorials.com\n Based on the NTP Client library example\n*********\/\n\n#include <WiFi.h>\n#include <NTPClient.h>\n#include <WiFiUdp.h>\n\n\/\/ Replace with your network credentials\nconst char* ssid = "REPLACE_WITH_YOUR_SSID";\nconst char* password = "REPLACE_WITH_YOUR_PASSWORD";\n\n\/\/ Define NTP Client to get time\nWiFiUDP ntpUDP;\nNTPClient timeClient(ntpUDP);\n\n\/\/ Variables to save date and time\nString formattedDate;\nString dayStamp;\nString timeStamp;\n\nvoid setup() {\n \/\/ Initialize Serial Monitor\n Serial.begin(115200);\n Serial.print("Connecting to ");\n Serial.println(ssid);\n WiFi.begin(ssid, password);\n while (WiFi.status() != WL_CONNECTED) {\n delay(500);\n Serial.print(".");\n }\n \/\/ Print local IP address and start web server\n Serial.println("");\n Serial.println("WiFi connected.");\n Serial.println("IP address: ");\n Serial.println(WiFi.localIP());\n\n\/\/ Initialize a NTPClient to get time\n timeClient.begin();\n \/\/ Set offset time in seconds to adjust for your timezone, for example:\n \/\/ GMT +1 = 3600\n \/\/ GMT +8 = 28800\n \/\/ GMT -1 = -3600\n \/\/ GMT 0 = 0\n timeClient.setTimeOffset(3600);\n}\nvoid loop() {\n while(!timeClient.update()) {\n timeClient.forceUpdate();\n }\n \/\/ The formattedDate comes with the following format:\n \/\/ 2018-05-28T16:00:13Z\n \/\/ We need to extract date and time\n formattedDate = timeClient.getFormattedDate();\n Serial.println(formattedDate);\n\n \/\/ Extract date\n int splitT = formattedDate.indexOf("T");\n dayStamp = formattedDate.substring(0, splitT);\n Serial.print("DATE: ");\n Serial.println(dayStamp);\n \/\/ Extract time\n timeStamp = formattedDate.substring(splitT+1, formattedDate.length()-1);\n Serial.print("HOUR: ");\n Serial.println(timeStamp);\n delay(1000);\n}\n<\/code><\/pre>\n\tHow the Code Works<\/h2>\n\n\n\n
#include <WiFi.h>\n#include <NTPClient.h>\n#include <WiFiUdp.h><\/code><\/pre>\n\n\n\nSetting SSID and password<\/h3>\n\n\n\n
\/\/ Replace with your network credentials\nconst char* ssid = \"REPLACE_WITH_YOUR_SSID\";\nconst char* password = \"REPLACE_WITH_YOUR_PASSWORD\";<\/code><\/pre>\n\n\n\nPreparing NTP Client<\/h3>\n\n\n\n
WiFiUDP ntpUDP;\nNTPClient timeClient(ntpUDP);<\/code><\/pre>\n\n\n\nString formattedDate;\nString dayStamp;\nString timeStamp;<\/code><\/pre>\n\n\n\nSerial.begin(115200);<\/code><\/pre>\n\n\n\n\/\/ Initialize Serial Monitor\nSerial.begin(115200);\nSerial.print(\"Connecting to \");\nSerial.println(ssid);\nWiFi.begin(ssid, password);\nwhile (WiFi.status() != WL_CONNECTED) {\n delay(500);\n Serial.print(\".\");\n}\n\/\/ Print local IP address and start web server\nSerial.println(\"\");\nSerial.println(\"WiFi connected.\");\nSerial.println(\"IP address: \");\nSerial.println(WiFi.localIP());<\/code><\/pre>\n\n\n\ntimeClient.begin();<\/code><\/pre>\n\n\n\ntimeClient.setTimeOffset(3600);<\/code><\/pre>\n\n\n\n\n
while(!timeClient.update()) {\n timeClient.forceUpdate();\n}<\/code><\/pre>\n\n\n\nGetting date and time<\/h3>\n\n\n\n
formattedDate = timeClient.getFormattedDate();<\/code><\/pre>\n\n\n\n2018-04-30T<\/strong>16:00:13Z<\/strong><\/pre>\n\n\n\n
\/\/ Extract date\nint splitT = formattedDate.indexOf(\"T\");\ndayStamp = formattedDate.substring(0, splitT);\nSerial.println(dayStamp);\n\/\/ Extract time\ntimeStamp = formattedDate.substring(splitT+1, formattedDate.length()-1);\nSerial.println(timeStamp);<\/code><\/pre>\n\n\n\nTesting the Code<\/h2>\n\n\n\n
![\"\"](\"https:\/\/i0.wp.com\/randomnerdtutorials.com\/wp-content\/uploads\/2018\/06\/date_and_time_ESP32.png?resize=753%2C443&quality=100&strip=all&ssl=1\")
<\/figure><\/div>\n\n\nWrapping Up<\/h2>\n\n\n\n
\n