With the help of notifications of a third app that tells the battery level, the WLAN switch is turned off. The loading level is set in the third app for automation, which can also send it via e-mail to ifttt as a trigger.
If
Notification received from a specific app
This trigger fires every time a new notification is received on your Android device from an app that you specify. NOTE: will not fire for IFTTT app notifications.
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