How would I log actions that occur during an internet outage and send notifications to my mobile once internet is back up?

I use cron on my raspberry pi. I have it run every 5 minutes (*/5 * * * *). The command I use is “wget https://hc-ping.com/[check url] -o /dev/null”. Then in HealthChecks.io I have a 2 minute grace period set up as you can see in the screenshot of my original post. I’ve been using it for about a year and it has worked flawlessly. There are details for setting it up on cron on their site https://healthchecks.io/docs/#crontab.

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Can you share please your sample automation?