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Top Forums Programming Arduino UNIX Time - Syncing Computer UNIX Time to Arduino Time with Python Post 303042446 by Neo on Wednesday 25th of December 2019 04:22:25 AM
Old 12-25-2019
As a side note:

I notice that when I use launchd and cron on my mac to keep an Arduino UNO in sync, that I cannot update the Arduino code though the IDE unless I unload the launchd file, stop the cron entry (actually, if fast do not need to modify cron) and power cycle the Arduino.

This takes more time than I like (unloading and loading launchd, editing and restarting cron twice, hard resetting the Arduino), so as a work around, I can update the Arduino on a different mac and then connect the updated Arduino back to the mac running launchd and cron on the required serial port. Note: If I'm fast, can get by not editing and restarting the crontab.

Today, I am experimenting with a 650nm (red) laser and was going to use this little laser to transmit and sync unix time to a remote receiver; but I don't have an optical receiver in my parts box yet.

I do have a long range RF transmitter and receiver in the mail from China, as well as a 3G module, so I maybe I'll transmit and sync unix time to my Ninja, for fun.

Actually, I need to think of some very cool, "science-project-like" Arduino project which is not already on YT or in the Arduino forums. I am thinking to do something with my motorcycle, time, position, and speed via 3G back to my home and store the results (tracking) in a database; but that sounds "too easy" Smilie (waiting on parts). Then I thought, I would create a RF network and transmit unix time as a beacon, but we have GPS for that. Haha....

Any crazy ideas (not already on YT)?
 

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Time::Piece::MySQL(3pm) 				User Contributed Perl Documentation				   Time::Piece::MySQL(3pm)

NAME
Time::Piece::MySQL - Adds MySQL-specific methods to Time::Piece SYNOPSIS
use Time::Piece::MySQL; my $time = localtime; print $time->mysql_datetime; print $time->mysql_date; print $time->mysql_time; my $time = Time::Piece->from_mysql_datetime( $mysql_datetime ); my $time = Time::Piece->from_mysql_date( $mysql_date ); my $time = Time::Piece->from_mysql_timestamp( $mysql_timestamp ); DESCRIPTION
Using this module instead of, or in addition to, "Time::Piece" adds a few MySQL-specific date-time methods to "Time::Piece" objects. OBJECT METHODS
mysql_date / mysql_time / mysql_datetime / mysql_timestamp Returns the date and/or time in a format suitable for use by MySQL. CONSTRUCTORS
from_mysql_date / from_mysql_datetime / from_mysql_timestamp Given a date, datetime, or timestamp value as returned from MySQL, these constructors return a new Time::Piece object. If the value is NULL, they will retrun undef. CAVEAT "Time::Piece" itself only works with times in the Unix epoch, this module has the same limitation. However, MySQL itself handles date and datetime columns from '1000-01-01' to '9999-12-31'. Feeding in times outside of the Unix epoch to any of the constructors has unpredictable results. Also, MySQL doesn't validate dates (because your application should); it only checks that dates are in the right format. So, your database might include dates like 2004-00-00 or 2001-02-31. Passing invalid dates to any of the constructors is a bad idea: on my system the former type (with zeros) returns undef (previous version used to die) while the latter returns a date in the following month. AUTHOR
Original author: Dave Rolsky <autarch@urth.org> Current maintainer: Marty Pauley <marty+perl@kasei.com> COPYRIGHT
(c) 2002 Dave Rolsky (c) 2004 Marty Pauley This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
Time::Piece perl v5.12.4 2008-06-07 Time::Piece::MySQL(3pm)
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