===== Uptime ======

==== Uptime() ====

Return number of seconds since last reset.

=== Description ===

<code>Uptime()</code>

This function returns the number of seconds since last reset.

The cause of a reset may be:
  * Power being removed/restored
  * Software reset due to firmware update
  * Software reset requested by the user
  * Software or hardware error (Watchdog reset)
  * Waking up from sleep mode

=== Parameters ===

none

=== Return value ===

Returns the number of seconds since the last reset.

=== Example usage ===

<code>Uptime()</code>

Will return 86400 after 24 hours running.