Script created for use on MotionEyeOs, to change configurations for day and night. https://github.com/ccrisan/motioneyeos

dayornight.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

# Script created for use on MotionEyeOs, to change configurations for day and night
# https://github.com/ccrisan/motioneyeos

# Crontab execute every 5 min
# 02,07,12,17,22,27,32,37,42,47,52,57 * * * * /usr/bin/python /data/dayornight.py >> /var/log/dayornight.log

from math import floor, ceil, pi, atan, tan, sin, asin, cos, acos
from datetime import date, datetime, timedelta
from time import mktime
import sys
import time
import os
import os.path
import shutil
import subprocess

def get_sunrise(lat, lng, dt, utc_offset):
    return sun_rise_set_calc(lat, lng, dt, utc_offset, True)

def get_sunset(lat, lng, dt, utc_offset):
    return sun_rise_set_calc(lat, lng, dt, utc_offset, False)

def sun_rise_set_calc(lat, lng, dt, utc_offset, get_sunrise):
    # by Ankit Haldar
    # https://github.com/ankithaldar
    dayOfYear = (floor(275*dt.month/9) - (floor((dt.month+9)/12) * (1+floor((dt.year-4*floor(dt.year/4)+2)/3))) + dt.day - 30)
    d2r = pi/180
    #convert the longitude to hour value and calculate an approximate time
    lngH = lng/15
    t = dayOfYear + ((6 if get_sunrise else 18) - lngH)/24
    #m => Sun's mean anomaly
    m = (0.9856 * t) - 3.289
    #l => Sun's true longitude
    l = m + (1.916 * sin(m*d2r)) + (0.020 * sin(2 * m*d2r)) + 282.634
    l +=  -360 if l > 360 else 360 if l < 360 else 0
    #ra = Sun's right ascension (right ascension value needs to be in the same quadrant as L)
    ra = atan(0.91764 * tan(l*d2r))/d2r
    ra +=  -360 if ra > 360 else 360 if ra < 360 else 0
    ra += (floor(l/90) - floor(ra/90)) * 90
    ra /= 15
    #sinDec, cosDec => Sine and Cosine of Sun's declination
    sinDec = 0.39782 * sin(l*d2r)
    cosDec = cos(asin(sinDec))
    #Sun's local hour angle
    cosH = (cos(90.8333333333333*d2r) - (sinDec * sin(lat*d2r))) / (cosDec * cos(lat*d2r))
    if get_sunrise and cosH > 1: print('the sun never rises on this location (on the specified date)'); sys.exit()
    elif not get_sunrise and cosH < -1: print('the sun never sets on this location (on the specified date)'); sys.exit()
    h = ((360 - (acos(cosH)/d2r)) if get_sunrise else (acos(cosH)/d2r))/15
    #Local mean time of rising/setting
    meanT = h + ra - (0.06571 * t) - 6.622
    #adjust back to local standard time
    local = meanT - lngH + utc_offset
    local += 24 if local < 0 else -24 if local > 24 else 0
    local *= 3600
    return(local)

def restart_MotionEye():
    os.system("/etc/init.d/S84streameye restart")
    os.system("/etc/init.d/S85motioneye restart")

def file_get_contents(path):
    if not os.path.isfile(path): return ""
    f = open(path, "r")
    data = f.read()
    f.close()
    return data

def file_put_contents(path, data):
    f = open(path, "w")
    f.write(data)
    f.close()

if __name__ == '__main__':

    debug = False

    # Get yout lat/lng from http://maps.google.com
    lat = -22.6823
    lng = -59.1343

    # Fine adjust: Set the time it takes after the sunrise or sunset, for light change to occur.
    day_lightin_delay = 20 #min
    day_lightout_delay = 20 #min

    # For Telegram config change notifications
    telegram_bot_api_token = ''
    telegram_chat_id = ''

    logStr = ''
    ts_now = time.time()
    utc_offset = ((datetime.fromtimestamp(ts_now) - datetime.utcfromtimestamp(ts_now)).total_seconds())/60/60 # includes daylight saving time
    #utc_offset = (-time.timezone)/60/60 # does not include daylight saving time
    dt_now = datetime.now()

    day_sunrise_secs = get_sunrise(lat, lng, dt_now, utc_offset)
    day_sunset_secs = get_sunset(lat, lng, dt_now, utc_offset)

    ts_day_start = mktime(datetime.strptime(datetime.fromtimestamp(ts_now).strftime("%Y-%m-%d 00:00"),"%Y-%m-%d %H:%M").timetuple())
    ts_day_sunrise = ts_day_start + day_sunrise_secs
    ts_day_sunset = ts_day_start + day_sunset_secs
    td_day_hours = timedelta(seconds = (ts_day_sunset - ts_day_sunrise))

    ts_day_lightin = ts_day_sunrise + (day_lightin_delay * 60)
    ts_day_lightout = ts_day_sunset + (day_lightout_delay * 60)

    lastStateFile = '/var/spool/dayornightState'
    lastState = file_get_contents(lastStateFile)
    currentState = ''
    if (ts_now >= ts_day_lightin and ts_now <= ts_day_lightout):
        currentState = 'day'
    else:
        currentState = 'night'

    logStr = datetime.fromtimestamp(ts_now).strftime("%Y-%m-%d %H:%M")
    logStr += ' (daylight from '+datetime.fromtimestamp(ts_day_lightin).strftime("%H:%M")+' to '+datetime.fromtimestamp(ts_day_lightout).strftime("%H:%M")+') = '
    if lastState != currentState:
       logStr += lastState+' > '+currentState
    else:
       logStr += currentState

    if (debug):
        print('-------------------------------\n{}\n-------------------------------'.format(datetime.fromtimestamp(ts_now).strftime("%Y-%m-%d %H:%M")))
        print('lat: {} lng: {}'.format(lat,lng))
        print('utc_offset with daylight saving time: {}'.format(utc_offset))
        print('day_sunrise: {}'.format(datetime.fromtimestamp(ts_day_sunrise).strftime("%H:%M")))
        print('day_sunset: {}'.format(datetime.fromtimestamp(ts_day_sunset).strftime("%H:%M")))
        print('hours of day: {:02d}:{:02d}'.format(td_day_hours.seconds/3600,td_day_hours.seconds%3600/60))
        print('day_lightin: {}'.format(datetime.fromtimestamp(ts_day_lightin).strftime("%H:%M")))
        print('day_lightout: {}'.format(datetime.fromtimestamp(ts_day_lightout).strftime("%H:%M")))
    else:
        print(logStr)

    if lastState != currentState:
        if (telegram_bot_api_token != '' and telegram_chat_id != ''):
            telegram_cmd = 'curl -s -X POST "https://api.telegram.org/bot'+telegram_bot_api_token+'/sendMessage" -F chat_id='+telegram_chat_id+' -F text="'+logStr+'"'
            telegram_cmd_subprocess = subprocess.Popen(telegram_cmd, shell=True, stdout=subprocess.PIPE)
            (stdoutdata, stderrdata) = telegram_cmd_subprocess.communicate()
            if (debug):
                print(stdoutdata)
        if os.path.isfile("/data/etc/thread-1.conf"):
            if (lastState != ''):
                shutil.copyfile("/data/etc/thread-1.conf", "/data/etc-"+lastState+"/thread-1.conf")
            shutil.copyfile("/data/etc-"+currentState+"/thread-1.conf", "/data/etc/thread-1.conf")
        print('updated config files, restarting motioneye...')
        restart_MotionEye()
        file_put_contents(lastStateFile, currentState)