Development v12

Warning - Product Update

All the resources present on this section belong to Waspmote v12, Waspmote Plug & Sense! v12 and Meshlium v3.8.

If you have a Waspmote v15, Waspmote Plug & Sense! v15 or Meshlium v4.0 please go to the new Development Section.

Check what is your version and what are the differences between the old and the new one in this document.

» RTC 08: Unix/Epoch time

This example shows how to use the functions related to the management of Time and Date as Unix/Epoch time.

Required Materials

1 x Waspmote
1 x MiniUSB wire
1 x Battery

Notes

- Epoch converter: http://www.epochconverter.com/
- This example can be executed in Waspmote v12 and Waspmote v15

Code

/*  
 *  ------ [RTC_08] Unix/Epoch time example -------- 
 *  
 *  Explanation: This example shows how to use the functions related to
 *  the management of Time and Date as Unix/Epoch time.
 *  
 *  Copyright (C) 2016 Libelium Comunicaciones Distribuidas S.L. 
 *  http://www.libelium.com 
 *  
 *  This program is free software: you can redistribute it and/or modify 
 *  it under the terms of the GNU General Public License as published by 
 *  the Free Software Foundation, either version 3 of the License, or 
 *  (at your option) any later version. 
 *  
 *  This program is distributed in the hope that it will be useful, 
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of 
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
 *  GNU General Public License for more details. 
 *  
 *  You should have received a copy of the GNU General Public License 
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>. 
 *  
 *  Version:           3.0
 *  Design:            David Gascon 
 *  Implementation:    Yuri Carmona
 */

// Define variable to store Epoch time
unsigned long	epoch;

// Define variable for UTC timestamps
timestamp_t   time;


void setup()
{
  // Open the USB connection
  USB.ON();
  USB.println(F("RTC_08 example"));

  // Powers RTC up, init I2C bus and read initial values
  USB.println(F("Init RTC"));
  RTC.ON();
  
  // Setting time as Saturday, 2014-12-20 at 14:38:47
  RTC.setTime("14:12:20:07:14:38:47");
  USB.println(F("Setting time to: Saturday, 2014-12-20 at 14:38:47"));
  USB.println();
  delay(1000);
  USB.println(F("-----------------------------------"));  
  
}

void loop()
{   
  
  ///////////////////////////////////////////////////////
  //  1. Get Epoch time from input values
  ///////////////////////////////////////////////////////
  
  // Get Epoch time from input values (i.e: 2014-12-20 at 14:38:47)
  epoch = RTC.getEpochTime( 14, 12, 20, 14, 38, 47 );
                            
  USB.print(F("Epoch Time from input values (14/12/20, 14:38:47): "));
  USB.println( epoch ); 
  delay(1000); 
  
  
  ///////////////////////////////////////////////////////
  //  2. Get Epoch time from RTC value
  ///////////////////////////////////////////////////////
      
  // Get Epoch time from RTC values
  epoch = RTC.getEpochTime();  
  
  USB.print(F("Epoch Time from RTC: "));
  USB.println( epoch );
  delay(1000); 
  
  
  ///////////////////////////////////////////////////////
  //  3. Break Epoch time into UTC Time
  ///////////////////////////////////////////////////////
  
  // Break Epoch time into UTC time
  RTC.breakTimeAbsolute( epoch, &time ); 
  
  USB.print(F("Break Time from epoch time:"));
  USB.print( time.year, DEC );    USB.print(F("/"));
  USB.print( time.month, DEC );   USB.print(F("/"));
  USB.print( time.date, DEC );    USB.print(F(","));
  USB.print( time.hour, DEC );    USB.print(F(":"));
  USB.print( time.minute, DEC );  USB.print(F(":")); 
  USB.print( time.second, DEC );  
  USB.println();
  delay(1000); 
  
  
  
  ///////////////////////////////////////////////////////
  //  4. Break seconds time into days/hours/minutes/seconds
  ///////////////////////////////////////////////////////
  
  // Break Time from epoch subtraction
  RTC.breakTimeOffset( (epoch-1419086327), &time ); 
  
  USB.print(F("Break Time from epoch subtraction into: ")); 
  USB.print( time.date, DEC );   USB.print(F(" days, "));
  USB.print( time.hour, DEC );   USB.print(F(" hours, "));
  USB.print( time.minute, DEC ); USB.print(F(" minutes, ")); 
  USB.print( time.second, DEC ); USB.println(F(" seconds"));
  
  USB.println(F("-----------------------------------"));  
  delay(10000); 
  
  
  
}

Output

H#
RTC_08 example
Init RTC
Setting time to: Saturday, 2014-12-20 at 14:38:47

-----------------------------------
Epoch Time from input values (14/12/20, 14:38:47): 1419086327
Epoch Time from RTC: 1419086329
Break Time from epoch time:14/12/20,14:38:49
Break Time from epoch subtraction into: 0 days, 0 hours, 0 minutes, 2 seconds
-----------------------------------
Epoch Time from input values (14/12/20, 14:38:47): 1419086327
Epoch Time from RTC: 1419086343
Break Time from epoch time:14/12/20,14:39:3
Break Time from epoch subtraction into: 0 days, 0 hours, 0 minutes, 16 seconds
-----------------------------------
Epoch Time from input values (14/12/20, 14:38:47): 1419086327
Epoch Time from RTC: 1419086357
Break Time from epoch time:14/12/20,14:39:17
Break Time from epoch subtraction into: 0 days, 0 hours, 0 minutes, 30 seconds
-----------------------------------
Epoch Time from input values (14/12/20, 14:38:47): 1419086327
Epoch Time from RTC: 1419086371
Break Time from epoch time:14/12/20,14:39:31
Break Time from epoch subtraction into: 0 days, 0 hours, 0 minutes, 44 seconds
-----------------------------------
Epoch Time from input values (14/12/20, 14:38:47): 1419086327
Epoch Time from RTC: 1419086385
Break Time from epoch time:14/12/20,14:39:45
Break Time from epoch subtraction into: 0 days, 0 hours, 0 minutes, 58 seconds
-----------------------------------
...

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