Arduino UNIX Time - Syncing Computer UNIX Time to Arduino Time with Python Post: 303042409

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Top Forums Programming Arduino UNIX Time - Syncing Computer UNIX Time to Arduino Time with Python Post 303042409 by Neo on Monday 23rd of December 2019 11:53:59 PM

12-24-2019

Administrator

Here is a quick sketch I put together for the Arduino UNO to get the unix time from the usb serial port and sync the Arduino time to the computer (in my case macos).

This sketch works but needs more refinement (trap errors, disconnects, add options, etc) but since I will not be doing much with this for the next few weeks, I post the first working draft below and will also post the python script I use on macos soon:

Code:

/*
  Sync UNIX Time with Computer and
  LCD Display with I2C on Arduino UN0
  Rough Draft 0.1  (needs improvements)
  Neo December 2019
  https://www.unix.com
*/

// Include Wire Library for I2C
#include <Wire.h>
// Include NewLiquidCrystal Library for I2C
#include <LiquidCrystal_I2C.h>
#include <Time.h>
#include <TimeLib.h>

#define TIME_MSG_LEN 11 // time sync to PC is HEADER followed by Unix time_t as ten ASCII digits
#define TIME_HEADER 'T' // Header tag for serial time sync message
#define TIME_REQUEST 7  // ASCII bell character requests a time sync message
#define DEBUG_SKETCH false
// Define LCD pinout
const int en = 2, rw = 1, rs = 0, d4 = 4, d5 = 5, d6 = 6, d7 = 7, bl = 3;
// can be any integer greater than zero and less than recent unix time
const int time_int = 1000;
// Define I2C Address - change if reqiuired
const int i2c_addr = 0x27;
String s;
bool flag = true;
time_t t = now();
LiquidCrystal_I2C lcd(i2c_addr, en, rw, rs, d4, d5, d6, d7, bl, POSITIVE);
void setup()
{
    Serial.begin(9600);
    Wire.begin();
    time_t t = now();
    lcd.begin(16, 2);
    lcd.clear();
}

void loop()
{
    lcd.clear();
    int count = 0;
    if (Serial.available() and flag)
    {
        lcd.clear();
        lcd.setCursor(0, 1);
        lcd.print("Serial OK");
        count = processSyncMessage();
        if (DEBUG_SKETCH)
        {
               Serial.println("Serial Available: " + count);
        }
        if (count > time_int)
            flag = false;
    }

    lcd.setCursor(0, 0);
    if (timeStatus() == timeNotSet)
    {
        if (flag)
        {
            Serial.println("waiting for sync message");
            lcd.print("Arduino Time:");
        }
    }
    else
    {

        lcd.print("Unix Time:");
        if (DEBUG_SKETCH)
        {
            Serial.println("Time Synced");
        }
    }
    t = now();
    s = String(t);
    if (s != '0')
    {
        lcd.setCursor(0, 1);
        lcd.print(t);
        lcd.print(" secs");
    }
    Serial.println(s);
    delay(1000);
    lcd.clear();
}

int processSyncMessage()
{
    while (Serial.available() >= TIME_MSG_LEN)
    { // time message consists of header & 10 ASCII digits
        char c = Serial.read();
        int count = 0;
        Serial.print(c);
        time_t pctime = 0;
        if (c == TIME_HEADER)
        {
            for (int i = 0; i < TIME_MSG_LEN - 1; i++)
            {
                c = Serial.read();
                if (c >= '0' && c <= '9')
                {
                    Serial.print(c);
                    count++;
                    pctime = (10 * pctime) + (c - '0'); // convert digits to a number
                }
            }
            Serial.print("\n");
            if (DEBUG_SKETCH)
            {
                Serial.write(pctime + "\n");
                Serial.println(pctime);
            }
            setTime(pctime); // Sync Arduino clock to the time received on the serial port
        }
        return count;
    }
}

Neo

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toshset

TOSHSET(1)						      User-installed Software							TOSHSET(1)

NAME

       toshset - manipulate bios and hardware settings of Toshiba laptops

SYNOPSIS

       toshset [TOGGLEOPTIONS | QUERYOPTIONS | FEATUREOPTIONS]...

DESCRIPTION

       Toshset	ia  a  command-line tool to allow access to much of the Toshiba hardware interface developed by Jonathan Buzzard. It can do things
       like set the hard drive spin-down time, turn off the display and set the fan speed.

       Credit for the difficult task of reverse-engineering the Toshiba hardware interface goes to Jonathan Buzzard.  A link for Jonathan's  tools
       is http://www.buzzard.org.uk/toshiba/

       All options are listed by running toshset with no arguments.

       If  an argument option is specified as the ``-'' character, stdin is read for that option. This is particularly convenient when setting the
       owner string.

       The method used for access to the laptop hardware is given by the the HCI/SCI access mode query field. This should be kernel or direct. The
       kernel  method  requires  kernel support and it is the only access method supported for ACPI kernels. If ACPI is not used this package does
       not require a special kernel module. Also, it is highly likely that this tool will work under different flavors of *NIX.  As  a	result	of
       this  design consideration, and because of my own desire that not every user be able to change my laptop's hardware settings, the user must
       have read/write permission to /dev/toshiba in order for this program to run properly.

   Toggle Options:
       -l     toggle long query in which the assocated command-line option is printed with each queried feature.

       -fast  run in fast mode: a startup check is skipped, and values are not queried after the are set. On machines for  which  ioctl  is  slow,
	      this can speed toshset up by up to a factor of 2/5.

       -v     toggle verbose mode in which normally silent messages are printed.

   Query Options:
       -q  [glob]
	      query  features  specified by glob (all features if glob omitted). The glob string is sandwiched between asterisks, so specifying -q
	      bat will query all features whose names contain the ``bat'' substring. If no glob is given, then all features are queried.

   Feature Options:
       Valid settings for features can be listed by omitting the argument. The current list of feature options is

       -b  <off|on>
	      enable/disable system beep

       -lcd <setting>
	      set lcd brightness.

       -inten <setting>
	      set lcd brightness. Not all models support both -lcd and -inten.

       -pow <setting>
	      set power-up mode

       -vol <0-4>
	      set beep volume. Note that this controls the modem volume for my PCMCIA modem.

       -hdd <num>
	      number of minutes until disk spindown

       -dstretch <off|on>
	      enable/disable display stretch

       -d <num>
	      number of minutes until display auto-off

       -c <method>
	      set cooling method

       -bs <setting>
	      set battery-save mode

       -bl <off|on>
	      control lcd backlight

       -bluetooth <off|on>
	      power-up + attach internal bluetooth device, or shutdown.

       -fan <setting>
	      control fan

       -video <int|ext|both|tv|mode5|mode6|mode7>
	      set display device for video: internal lcd, external monitor, or tv-out

       -cpu <slow|fast>
	      set CPU speed

       -cpucache <off|on>
	      enable/disable CPU cache

       -sleep <off|on>
	      enable/disable CPU sleep mode

       -balarm <off|on>
	      enable/disable battery alarm

       -palarm <off|on>
	      enable/disable lid-closed alarm

       -walarm <dis|HH:MM[/everyday|DD/MM[/YYYY]]>
	      set time/date to wake

       -ppower <off|on>
	      enable/disable annoying feature of powering-off computer when lid is closed.

       -parallel <mode>
	      set parallel port mode

       -autooff <num>
	      number of minutes of idle time until system auto-off

       -ostring <owner string>
	      set owner string. This string is displayed at boot or resume time, if a user or supervisor password is set.

       -upasswd
	      set or clear the user password. Toshset must be run on the console for this to work. The password should be entered when the  prompt
	      is displayed. If the password is currently set, entering it will clear the password.

       -spasswd
	      set the supervisor password. See the docs for -upasswd.

       -usblegacy
	      USB legacy mode: enable/disable using an USB mouse as it would be a PS/2 one, without the need to install a USB driver.

       -3g    power-up + attach internal 3g modem device, or shutdown.

       -usbfdd
	      USB  FDD	emulation  mode:  is  almost the same of the previous one for a floppy. It enables the use of an USB floppy as it would be
	      attached to an internal FD controller (for booting etc.)

       -lan   Enables/disables internal LAN controller.

       -soundlogo
	      enable/disable startup sound logo.

       -startlogo
	      startup logo mode (picture or animation>.

       -trmode
	      enable/disable the display's transreflective mode.

	      Features may also be set by specifying the (zero-offset) index of the option. e.g. toshset -cpu 0 sets the cpu speed to slow.

BUGS

       Many features are locked and can not be changed when the battery save mode is not ``user.'' Since I only have one laptop, I can't test this
       utility on other hardware. User feedback in this regard is helpful. Some features do not work on my laptop and they may work on your's, and
       visa-versa.

       Toshset requires an experimental version of the toshiba_acpi kernel module with an ACPI-enabled kernel.

AUTHOR

       Written by <Charles@Schwieters.org>
       News, updates and documentation: visit http://schwieters.org/toshset.html

COPYRIGHT

       Copyright (C) 2002-8 Charles D. Schwieters
       This is free software; see the source for copying conditions.  There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
       LAR PURPOSE.

toshset 2							    March 2008								TOSHSET(1)