Often times, I want to send an MQTT message to a device so that it can automatically do something on a timed basis. Example, say I want to turn on my greenhouse lights for my seedlings in the morning, at a certain time, and then turn them off in the evening at a certain time. If you are using Adafruit, it has a trigger that wakes up every so many minutes, hours, days, weeks. But, I want to have things to trigger at the same time every day.
I could use cron on one of my linux boxes. But, in my case, I wanted to use a windows box to do the time triggering. An easy way to do this is to use Windows Task Scheduler that comes with Windows.