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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
12-25-2019
Administrator
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"
(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)?
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"
(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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LEARN ABOUT MOJAVE
taskgated
taskgated(8) BSD System Manager's Manual taskgated(8) NAME
taskgated -- task_for_pid access control daemon SYNOPSIS
taskgated [-s] [-t timeout] [-i pid] DESCRIPTION
taskgated is a system daemon that implements a policy for the task_for_pid system service. When the kernel is asked for the task port of a process, and preliminary access control checks pass, it invokes this daemon (via launchd) to make the decision. OPTIONS
-t timeout The daemon will quit after that many seconds of inactivity. It will be relaunched by launchd as needed. A timeout of zero can be specified to make the daemon quit after servicing each request, but a small positive timeout is better for performance. -i pid Inject the service port of taskgated into the process with the given pid, rather than relying on launchd to install it system-wide. This is for testing only, and requires the launchd configuration for taskgated to be removed. AUTHORIZATION RIGHTS
system.privilege.taskport Authorization right used to check access of allowed (but not safe) callers. INFO KEYS
SecTaskAccess A value of "allowed" is required for any program that wants access to task ports. A value of "safe" bypasses authorization checks if so configured. Code must be signed by any system-trusted signing authority. FILES
/etc/authorization to configure the authorization used. /System/Library/LaunchDaemons/com.apple.taskgated startup configuration file for taskgated SEE ALSO
security(1), launchd(8) HISTORY
taskgated was first introduced in Mac OS 10.5 (Leopard). Procmod and procview support (-p) was removed in 10.11. Certain software updates of Mac OS 10.4 (Tiger) introduced the convention requiring membership in the procmod or procview groups to control task port access. Before that, any process could obtain the task port of any other process with the same user-id. Darwin June 1, 2019 Darwin