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Delay to trigger "offline" notification

I am looking for a way to set a delay before an “offline” notification is triggered.

My Blynk app is running on iPhone, receiving data from an ESP8266, which monitors water level on a basement sump pit. This has been in place for months and works nicely, except that it daily goes offline several times for a few seconds (wifi interference, I presume). For each event, an offline notification is issued and a few moments later it comes back online.
This results in the notifications being ignored and becoming nothing more than a nuisance.

Therefore my question: is there a way to set a delay before triggering the notification?

It’s right there in the notification widget…

You can choose to ignore offline periods of between 1 second and 24 hours before a notification is triggered…

Pete.

Fantastic !!! Thanks, Pete !