Werk #19717: Fetch correct OID for AKCP Sensor

Component	Checks & agents
Title	Fetch correct OID for AKCP Sensor
Date	Jul 30, 2026
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	3.0.0b1 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.5.0p11 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT 2.4.0p36 Not yet released Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

Previously, the service AKCP: Drycontact Sensor could report the wrong online state on sensorProbe and older HHMS devices.

To tell whether a sensor is online, the check read hhmsSensorArraySwitchGoOnline. That field is not a reading at all, it is a read-write control register. The check now reads hhmsSensorArraySwitchOnline instead, documented as "If this Sensor is currently online".

The control register usually mirrors the actual state, so most devices are unaffected.

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