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Top Forums Programming Arduino UNIX Time - Syncing Computer UNIX Time to Arduino Time with Python Post 303042410 by Neo on Tuesday 24th of December 2019 12:20:18 AM
Old 12-24-2019
Here is the Python 2.7.16 code I quickly put together to send unix time to the Arduino UNO.

I assume it also works on Python3, but I have not tested it because I have not completely upgrade python on my mac pro yet, sorry about that.

Code:
# -----------------------------------------------------------
# Sync Unix Time with Arduino Initial Draft 0.1
# Written on macOS, tested with Python 2.7.16
# Neo, December 2019
# This code needs refinement to be more general
# I will improve this code later when I need to use it in an Arduino project
# For now, it works "OK" and serves it purpose
# Feel free to improve, modify as you like.
# -----------------------------------------------------------
import serial
import time

ser = serial.Serial(
    port='/dev/cu.usbserial-40',  #change this for your device
    baudrate=9600,
    parity=serial.PARITY_NONE,
    stopbits=serial.STOPBITS_ONE,
    bytesize=serial.EIGHTBITS,
    timeout=0)

print("connected to: " + ser.portstr)

# this will store the line
line = []
ux = 0
a = False
debugScript = False
offset = 2 .  #adjust this time offset (in seconds) to account for various time delays in script and transferring via the serial port, etc. to insure the Arduino is in closer sync to the computer
time_int = 1000  # this can be any number greater than zero and less than recent unix time
count = 0
while True:
    if debugScript:
        print(str(int(time.time())))
    for c in ser.read():
        if not a:
            if ux < time_int:
                ser.write("T")
                ux = int(time.time())+offset
                ser.write(str(ux))
                ser.write("\n")
                ser.flush()
                if debugScript:
                    print("unixtime: " + str(ux))
        line.append(c)
        count += 1
        if c == '\n':
            print("Line("+str(count)+"): " + ''.join(line))
            x = int(time.time())+offset
            print("time("+str(count)+"): " + str(x) + "\n")
            line = []
            a = True
            break
ser.close()

 

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ser(8)								Sip Express Router							    ser(8)

NAME
ser - very fast and configurable sip proxy SYNOPSIS
ser [ -hcrRvdDEVT ] [ -f config-file ] [ -l address [ -p port ] ]... ] [ -n processes-no ] [ -N tcp processes-no ] [ -b max_rcv_buf_size ] [ -m shared_mem_size ] [ -w working-dir ] [ -t chroot-dir ] [ -u uid ] [ -g gid ] [ -P pid-file ] [ -i fifo-path ] DESCRIPTION
ser or Sip Express Router is a very fast and configurable SIP proxy. OPTIONS
-h Displays a short usage description, including all available options. -c Checks the config file and displays the aliases and listen interface list. -r Uses dns to check if it is necessary to add a "received=" field to a via. -R Same as -r but uses reverse dns. -v Turns on via host checking when forwarding replies. -d Turns on debugging, multiple -d increase the debug level. -D Runs ser in the foreground (it doesn't fork into daemon mode). -E Sends all the log messages to stderr. -T Disables TCP support. -V Displays the version number. -f config-file Reads the configuration from config-file (default /etc/sfw/ser/ser.cfg ). -l address Listens on the specified address. Multiple -l mean listening on multiple addresses. The default behaviour is to listen on all the ipv4 interfaces. -p port Listens on the specified port (default 5060). It applies to the last address specified with -l and to all the following that do not have a corresponding -p. -n processes-no Specifies the number of children processes forked per interface (default 8). -N tcp processes-no Specifies the number of children processes forked to handle tcp incoming connections (by default is equal to -n ). -b max_rcv_buf_size Maximum receive buffer size which will not be exceeded by the auto-probing procedure even if the OS allows. -m shared_mem_size Size of the shared memory which will be allocated (in Megabytes). -w working-dir Specifies the working directory. In the very improbable event that ser will crash, the core file will be generated here. -t chroot-dir Forces ser to chroot after reading the config file. -u uid Changes the user id under which ser runs. -g gid Changes the group id under which ser runs. -P pid-file Creates a file containing the pid of the main ser process. -i fifo-path Creates a fifo, usefull for monitoring ser status. FILES
/usr/sfw/sbin/ser /etc/sfw/ser/ser.cfg /usr/sfw/lib/ser/modules/* AUTHORS
Andrei Pelinescu - Onciul, <pelinescu-onciul@fokus.gmd.de> Bogdan Andrei Iancu Daniel-Constantin Mierla Jan Janak Jiri Kuthan Juha Heinanen Maxim Sobolev Miklos Tirpak Nils Ohlmeier Ramona-Elena Modroiu Raphael Coeffic Ricardo Baratto Stelios Sidiroglou-Douskos SEE ALSO
ser.cfg(5) Full documentation on ser, including configuration guidelines, FAQs and licensing conditions, is available at http://www.iptel.org/ser/. For reporting bugs see http://www.iptel.org/ser/bugs/. Mailing lists: serusers@iptel.org - ser user community serdev@iptel.org - ser development, new features and unstable version For help/support, write an email to <serhelp@iptel.org>. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +--------------------+--------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +--------------------+--------------------+ |Availability | SUNWserr, SUNWseru | +--------------------+--------------------+ |Interface Stability | External | +--------------------+--------------------+ NOTES
Source for ser is available on http://opensolaris.org. ser 15.07.2002 ser(8)
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