Analytics Builder: send email when heartbeat missing

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Hi,

I’ve set up a device to send periodic heartbeat events to Cumulocity. Using Analytics Builder (image attached), I created a model to send an email if no heartbeat is received for 1 minute. The email sends correctly when the heartbeat is missing, but it also sends when the heartbeat resumes.

Issue:

  • Email is sent correctly when heartbeat is missing for 1 minute.
  • Unwanted email is sent when heartbeat resumes.

How can I modify my Analytics Builder model to only send emails when the heartbeat is missing, not when it resumes?

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Can you please check if the existing sample On missing measurements create alarm satisfies your use case?