How to read sensor data at 0, 5, 10, 15... of every hour?

[mtt]

Hi would like read sensor data (pulse) not every 5 minute but at 0,5,10,15,... minute of every hour. In other words I am looking syncronitation between NTP time and delay of sensor.
Thanks

[Yves911]

Maybe you can use a Timer (300 s) for that http://www.esp8266.nu/index.php/Tutorial_Rules#Timer and start counting at 00

[mtt]

This is not the solution. How can start read sensor data at midnight? And what happen when esp8266 restart?

[tozett]

that raises the problem, how the esp knows when its midnight.
you must have working ntp-time. i guess. or working manual time.
than you could use rules with the time. (link to the wiki was given before).

may you touch the good idea, to have something like linux-"cron" scheduler within espeasy/rules..