How to get the correct time of my time zone

[Oscar-Chung-CKL]

i have download the library and i am using the neo-6m module on Arduino

I am able to get the time and the gps location, but the time is not the time in my timezone, may i know how can i solve the issue so that i can get the correct time of my time zone ?

[cyberman54]

This is a requirement out of scope of Tinygpsplus.

You need a separate library or OS function to handle timezones and to convert times local <-> UTC(GPS). And taking care of leap seconds.

[Jens869]

` #include <TinyGPS++.h> // TinyGPS++ V 1.0.2 or higher
#include <Time.h> // Time V1.6.1 or higher #include <Timezone.h> // Timezone V1.2.4 or higher

TimeChangeRule CEST = {"", Last, Sun, Mar, 2, 120}; // Europa timezone TimeChangeRule CET = {"", Last, Sun, Oct, 3, 60}; Timezone CE(CEST, CET); TimeChangeRule *tcr;

CODE .... CODE

//if (gps.time.isValid()) // BUG in TinyGPS++ if (gps.date.month()>0) {

    setTime(gps.time.hour() , gps.time.minute(), gps.time.second() , gps.date.day(), gps.date.month(), gps.date.year());
    time_t cet=CE.toLocal(now(),&tcr);          // Zeiger auf Zeitzone
    setTime(cet);                               // auf MEZ / MESZ umschalten   
  
   }

`

[JasonPittenger]

NMEA sentence nZDA is supposed to give you time zone information.

information: ZDA Descripiton: Time and date information. Type: Output Format: $--ZDA,UTCtime,day,month,year,ltzh,ltznCS<CR><LF> Example: $GPZDA,235316.000,02,07,2011,00,0051 Field name Format Parameter Description 1 $--ZDA String Message ID, ZDA statement header,'--' is the system identifier 2 UTCtime hhmmss.sss UTC time when positioning 3 day Numerical value Day, fixed two digits, value range 01~31 4 month Numerical value Month, fixed two digits, value range 01~12 5 year Numerical value Year, fixed four digits 6 ltzh Numerical value This time zone is hour 7 ltzn Numerical value Minutes in this time zone 8 CS Hexadecimal value Checksum, the exclusive OR of all characters between $ and * (not including $ and *) 9 <CR><LF> character Carriage return and line feed

Use the following to extract the information.

TinyGPSCustom	LocalTimeZoneHour(gps, "GPZDA", 5);
TinyGPSCustom	LocalTimeZoneMinute(gps, "GPZDA", 6);

Those will give you the offset in hours and minutes from UTC

[Jens869]

after a year, what are you talking about?

[JasonPittenger]

I know it's a year later, but the internet is forever.
Someone else is bound to have a similar question. I was unaware until today that the NMEA sentence GPZDA has the local timezone offset in it. I plan to use this myself.

[syproduction]

To make it work you need to use "whole constellation", thus use command GNZDA

TinyGPSCustom zHour(gps, "GNZDA", 5);
TinyGPSCustom zMinute(gps, "GNZDA", 6);

Anyway in my case it outputs 00:00 although I'm in GMT+1

[Jason-Pittenger]

Anyway in my case it outputs 00:00 although I'm in GMT+1

That's what I got too. I think only certain GPS devices can interpret the offset information, and the rest output 0 all the time.