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Is it possible to trigger an alarm when there is no telemetry from the device for a specified time or for a given number of polling periods?

This trigger has the same meaning as a Dead man's switch for humans.

Or what is the best way for TB to detect a broken connection, assuming that not every IoT device can keep an open TCP/MQTT/etc session for a long time.

viktorkho
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1 Answers1

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Thingsboard's builtin rules engine may help you on this, Official Docs

BTW, there is a nice user guide to help you detect inactive/offline devices, see here

balun
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