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windowsbatch-fileperiodperiodicity

How to fire a command at HH:29:55 and HH:59:55 in a windows batch file

In a windows batch file (x.bat), how can I fire a command once every 30 minutes, when the second component of the time is greater than 55?

What I have now is:

:loop
    program.exe
    PING localhost -n 1800 >NUL
goto loop

The problem is that the timing is not precise enough, ie. sec>55 at min%30==29.

Solution

  • As mentioned, Task Scheduler is more than capable for this task. It can be run daily, every 30 minutes starting at next hour:59:55

    That said, there are ways to script these things. This is not the most robust solution, but it works.

    @echo off
:start
for /f %%i in ('powershell Get-Date -Format mm:ss') do (
    if "%%i"=="29:55" program.exe
    if "%%i"=="59:55" program.exe
timeout 1 /nobreak>nul
)
goto start