First enable temperature monitoring at a tag. When tag reports too cold, wemo plug will be turned on. Please also run the applet to turn off Wemo when tag reports temperature back to normal.
If
Temperature is too low
This Trigger fires when a specified tag senses that its ambient temperature falls below an lower threshold configured at temperature options screen inside the WirelessTag app.
Then
Turn on
This Action will turn a WeMo Insight Switch on. If the WeMo Insight Switch is already on, it will remain on.
Explore more great ways to automate WeMo Insight Switch and Wireless Tag