Arduino UNIX Time - Syncing Computer UNIX Time to Arduino Time with Python Post: 303042410

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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

12-24-2019

Administrator

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()

Neo

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ldns-read-zone

ldns-read-zone(1)					      General Commands Manual						 ldns-read-zone(1)

NAME

       ldns-read-zone - read a zonefile and print it

SYNOPSIS

       ldns-read-zone ZONEFILE

DESCRIPTION

       ldns-read-zone reads a DNS zone file and prints it. The output has 1 resource record per line, and no pretty-printing makeup.

OPTIONS

       -c     Canonicalize all resource records in the zone before printing

       -d     Only  print  DNSSEC  data from the zone. This option skips every record that is not of type NSEC, NSEC3, RRSIG or DNSKEY. DS records
	      are not printed.

       -b     Include Bubble Babble encoding of DS's.

       -0     Print a (null) for the RRSIG inception, expiry and key data. This option can be used when comparing different signing  systems  that
	      use the same DNSKEYs for signing but would have a slightly different timings/jitter.

       -h     Show usage and exit

       -n     Do not print the SOA record

       -p     Pad  the	SOA serial number with spaces so the number and the spaces together take ten characters. This is useful for in file serial
	      number increments.

       -s     Strip DNSSEC data from the zone. This option skips every record that is of type NSEC, NSEC3, RRSIG or DNSKEY. DS records	are  still
	      printed.

       -S [[+|0]number | YYYYMMDDxx | unixtime ]
	      Set  serial  number  to  the  given number, or when preceded by a sign, offset the exisiting number with it. When giving the literal
	      strings YYYYMMDDxx or unixtime, the serial number is tried to be reset in datecounter or in unixtime format respectively. Though	is
	      the updated serial number is smaller than the original one, the original one is simply increased by one.

	      When updating a serial number, records of type NSEC, NSEC3, RRSIG and DNSKEY will be skipped when printing the zone.

       -v     Show the version and exit

       -z     Sort the zone before printing (this implies -c)

AUTHOR

       Written by the ldns team as an example for ldns usage.

REPORTING BUGS

       Report bugs to <ldns-team@nlnetlabs.nl>.

COPYRIGHT

       Copyright  (C)  2005 NLnet Labs. This is free software. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PUR-
       POSE.

								    30 May 2005 						 ldns-read-zone(1)