If temperature rises above 32°F, then send IFTTTrigger-Temp-AboveFrz

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Prevent Wasting H2O Dripping Faucets, triggers Alexa Announcement when ABOVE freezing. Configure: Location. Instructions: 1) In Alexa app, enable skill-IFTTTrigger 2) Login to Amazon 3) In Alexa app, create new Routine: 3a) Name: Temp ABOVE freezing 3b) When this happens: Smart Home, IFTTTrigger-Temp-ABOVE-Frz, Save 3c) Add Action: Messaging, Send Announcement, "Temperature is above freezing. Turn off faucets.", Next, All Devices, Next, Next, Save

This Trigger monitors your local temperature and fires whenever the temperature rises above the value you provide.

This service from mkZense will send an action to run a routine on your Alexa device. Use it to add Voice to your Applet.