Re: [Openhpi-devel] How to generate an event when a sensor value exceed a warning threshold ?

[Renier M. <re...@us...>]

ope...@li... wrote on 04/13/2007 04:53:37=20
AM:

> Hi,
>=20
> For several days, i play with OpenHPI 2.8.1 to try to figure out how it
> works. Since the online documentation is not very helpful when you go to
> the details (i know that a documentation update is expected for the
> 2.9.0), i hope to get missing informations thanks to this mailing-list.
>=20
> I have slightly modified the simulator plugin to change a fan sensor
> value (which actually is hard coded) to try to force OpenHPI to generate
> an event when the sensor value exceed a warning threshold.

In reality, the hardware is what generates the event ideally and the=20
plugin catches the event an generates an HPI event in OpenHPI. So the=20
plugin needs to generate it, not the top infrastructure, whether because=20
it saw the hardware event or because it saw the right conditions to do so.

>=20
> For that, i have modified the oh=5Fget=5Fsensor=5Freading() equivalent
> function to change the value previously hard-coded (in fact, i read a
> file which contains the value i want to display). But when the sensor
> value exceed the up critical threshold, nothing happen (i modified the
> sim=5Ffan=5Fsensors structure).

You need to add code in the simulator plugin instead, to check the sensor=20
value whenever get=5Fevent is called, and generate the sensor event if it=20
detected a change.

>=20
> And whereas i expected that the reading of all sensors value was
> automatic, i needed to call a client by hand ("hpitree" for instance) to

A better one to use is hpisensor.

> force OpenHPI to reread all values. Except oh=5Fget=5Fevent() which is
> called regularly, OpenHPI don't seems to try to reread all sensor values
> in a regular manner ; so it's unclear for me how OpenHPI can generate
> alone (without the interaction of a client) an event when a sensor value
> (or what you want) exceed a threshold.

The reading of sensors is not automatic, but the events coming from the=20
plugins are automatic.

>=20
> Am i wrong ? Maybe OpenHPI consider that a client need to check values
> regularly to be able to generate events ? And why no event is generate ?
>=20
> thanks in advance,
> Lionel Tricon
>=20
>=20
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>=20
>=20