Return number of seconds since last reset.

Uptime()

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

none

Returns the number of seconds since the last reset.

Uptime()

Will return 86400 after 24 hours running.