Add a ntp server in arduino library

Thomas · January 28, 2016, 5:16pm

Hello, it would be great if the library Blynk for Arduino could provide the date and time of an NTP server, it would be possible?

cyberbum · January 28, 2016, 5:25pm

If you have an ESP8266, there’s a code library which lets you query an NTP server. You basically setup your Arduino to communicate with the ESP via serial and use some of the following code to query an NTP server.

github.com

bportaluri/WiFiEsp/blob/master/examples/UdpNTPClient/UdpNTPClient.ino

/*
 WiFiEsp example: UdpNTPClient

 Get the time from a Network Time Protocol (NTP) time server.
 Demonstrates use of UDP to send and receive data packets
 For more on NTP time servers and the messages needed to communicate with them,
 see http://en.wikipedia.org/wiki/Network_Time_Protocol

 NOTE: The serial buffer size must be larger than 36 + packet size
 In this example we use an UDP packet of 48 bytes so the buffer must be
 at least 36+48=84 bytes that exceeds the default buffer size (64).
 You must modify the serial buffer size to 128
 For HardwareSerial modify _SS_MAX_RX_BUFF in
   Arduino\hardware\arduino\avr\cores\arduino\SoftwareSerial.h
 For SoftwareSerial modify _SS_MAX_RX_BUFF in
   Arduino\hardware\arduino\avr\libraries\SoftwareSerial\SoftwareSerial.h
*/

#include "WiFiEsp.h"
#include "WiFiEspUdp.h"

This file has been truncated. show original

Thomas · January 28, 2016, 7:27pm

Good but with this I must disconnect from blynk and run this sketch, I think the hour and date already pass between server and arduino, just to reveal it and pass these values from a function

Costas · January 28, 2016, 7:58pm

@Thomas the idea would be to include the required parts of the ntp sketch in your existing sketch.

Thomas · January 28, 2016, 9:48pm

Shure but with Blink.GetTime() or similar is more easy and It uses existing data, almost certainly the messages that are exchanged with the server contains a timestamp that can be used

Costas · January 28, 2016, 9:54pm

Blynk has a RTC widget but I think at present it’s only available on local servers.

Dmitriy · January 28, 2016, 10:50pm

Hi. RTC will be soon and you’ll be able to get time and date. At the moment we preparing app for more customization options.

vshymanskyy · March 6, 2016, 9:35pm

You can now use RTC widget, in the latest library and App

Cheers!