NAME

        UpTime.h - Arduino uptime and events in seconds

SYNOPSIS

        #include <Arduino.h>
        #include <UpTime.h>     // https://github.com/jozef/Arduino-UpTime
    
        uptime_interval fire2(2);
        uptime_interval fire5(5,UPTIME_RIGHT_AWAY);
    
        void setup () {
            Serial.begin(9600);
        }
    
        void loop () {
            Serial.println("uptime: "+uptime_as_string()+" or "+uptime()+"s");
            if (fire2.check()) Serial.println("2s elapsed");
            if (fire5.check()) Serial.println("5s elapsed");
            delay(1400);
        }

    will output:

        uptime: 00:00:00 or 0s
        5s elapsed
        uptime: 00:00:01 or 1s
        uptime: 00:00:02 or 2s
        2s elapsed
        uptime: 00:00:04 or 4s
        2s elapsed
        uptime: 00:00:05 or 5s
        5s elapsed
        uptime: 00:00:07 or 7s
        2s elapsed
        uptime: 00:00:08 or 8s
        2s elapsed
        uptime: 00:00:09 or 9s
        uptime: 00:00:11 or 11s
        2s elapsed
        5s elapsed
        …
        uptime: 04:41:23 or 16883s
        uptime: 04:41:25 or 16885s
        2s elapsed
        5s elapsed
        uptime: 04:41:26 or 16886s
        2s elapsed
        uptime: 04:41:28 or 16888s
        2s elapsed
        uptime: 04:41:29 or 16889s
        uptime: 04:41:30 or 16890s
        2s elapsed
        5s elapsed

DESCRIPTION

    Uptime class is made to to track uptime of Arduino in seconds. The
    uptime() or check() functions has to be called at least once for 0xFFFF
    seconds (once in 18h) to work. Seconds will be counted even after
    Arduinos millis() overrun and the seconds of unsigned long are enough
    to not overrun sooner then in 136+ years. Once 0xFFFF0000 seconds is
    elapsed, will trigger reset so that Arduino program clearly starts all
    over again.

METHODS

 bool check()

    Returns true/false if the interval elapset.

 void reset(bool postpone = true)

    Will reset the time to count from current moment in until interval. If
    postpone is set to false, check() will return true with next call.

INSTALL

        git clone https://github.com/jozef/Arduino-UpTime sketchbook/libraries/UpTime

EXAMPLES

 examples/UpTime_tick/UpTime_synopsis.ino

    synopsis section example

 examples/UpTime_tick/UpTime_tick.ino

    print formatted and raw uptime in seconds und 4x interval

LICENSE

    This is free software, licensed under the MIT License.

AUTHOR

        Jozef Kutej