LED blink clock – flash LED every second

blinkclock-init.sh

#!/bin/sh /etc/rc.common
# Copyright (C) 2016 OpenWrt.org

START=99
USE_PROCD=1

start_service()
{
        procd_open_instance
        procd_set_param command "/root/blinkclock.py"
        procd_close_instance
}

blinkclock.py

#!/usr/bin/env python2.7

import time
import os

ledpath="/sys/class/leds/omnia-led:power/"

autonomous = os.path.join(ledpath, 'autonomous')
if os.path.exists(autonomous):
    with open(autonomous, 'w') as aut:
        aut.write('0')

with open(os.path.join(ledpath, 'trigger'), "w") as trg:
    trg.write('oneshot')

while True:
    now = time.time()
    time.sleep(1 - now%1)
    with open(os.path.join(ledpath, 'shot'), "wb") as shot:
        shot.write('1')