For each feed with a numeric type of data (e.g. temperature, pressure, humidity…) you can define high and low alarm thresholds. If the reading of the feed crosses the defined threshold, you will receive a message in the Messages module on the Platform. You are able to set thresholds in two different ways:
If you go to Edit data button which appears when you hover over the feed you would like to modify:
Note: You can set alarm thresholds only for numeric type of data i.e. only for feeds and not actuators.