Week 5 Timestamp

[vijay13sagar]

Worked on adding timestamp to the JSON format of the data we are receiving from AWS Node.

1. Received some buffer errors but could not get the timestamp into the JSON.
2. Tried NTP to get the timestamp
3. Using the Time.h and TimeLib.h libraries

// Adding the header files

include

include

// Using the function to get time from millis() function t = millis(); t = t/1000;

// Code in the datafile writing File dataFile = SD.open("Vaisala.txt", FILE_WRITE); if (dataFile) { dataFile.print(t); Serial.print(t); }

[saikishorechalumuri]

Did A research on Time stamp of various Methods and selected a software method to access the time using NTP:

! image

The fundamental operating principle is as follows:

step 1: The client device, such as the ESP8266 (which we use for the project, connects to the NTP server via the User Datagram Protocol (UDP) on port 123. step 2: The client then sends a request packet to the NTP server.

step 3: In response to this request, the NTP server sends a time stamp packet. A time stamp packet contains a variety of data, such as a UNIX timestamp, accuracy, delay, or time zone. step 4: A client can then extract the current date and time from it.

Code to access the Time via using NTP Server

include

include

include

const char ssid = "YOUR_SSID"; const char password = "YOUR_PASS";

const long utcOffsetInSeconds = 3600;

char daysOfTheWeek[7][12] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

// Define NTP Client to get time WiFiUDP ntpUDP; NTPClient timeClient(ntpUDP, "pool.ntp.org", utcOffsetInSeconds);

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

WiFi.begin(ssid, password);

while ( WiFi.status() != WL_CONNECTED ) { delay ( 500 ); Serial.print ( "." ); }

timeClient.begin(); }

void loop() { timeClient.update();

Serial.print(daysOfTheWeek[timeClient.getDay()]); Serial.print(", "); Serial.print(timeClient.getHours()); Serial.print(":"); Serial.print(timeClient.getMinutes()); Serial.print(":"); Serial.println(timeClient.getSeconds()); //Serial.println(timeClient.getFormattedTime());

delay(1000); }