"Is there a way to edit the frequency at which alarm emails are sent?"
The short answer is "yes".
By default alarm emails are sent once when the alarm goes "on" and once when the alarm goes "off". Users can select to mark an alarm rule as "critical" on the "threshold details" page in which case you will receive an alarm email for each sensor reading that would trigger that alarm rule to "on". If you configure an "alarm delay" for that alarm rule then you would receive an alarm email every <alarm delay> minutes _assuming_ that sensor readings continue to trigger that alarm rule.
The short answer is "yes".
By default alarm emails are sent once when the alarm goes "on" and once when the alarm goes "off". Users can select to mark an alarm rule as "critical" on the "threshold details" page in which case you will receive an alarm email for each sensor reading that would trigger that alarm rule to "on". If you configure an "alarm delay" for that alarm rule then you would receive an alarm email every <alarm delay> minutes _assuming_ that sensor readings continue to trigger that alarm rule.
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