From: Mike Jones <proclivis@gmail.com>
To: Ed Tanous <edtanous@google.com>
Cc: OpenBMC Maillist <openbmc@lists.ozlabs.org>
Subject: Re: Query Sensor
Date: Tue, 11 Jan 2022 10:16:58 -0700 [thread overview]
Message-ID: <9049D645-3D91-4302-881A-E5FD287FE22C@gmail.com> (raw)
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This is how to do it:
dbus-send --system --print-reply \
--dest=xyz.openbmc_project.Hwmon-5a446562b1a2e55ef11da905907088a187a66b71eb7a1f29187594c05bb8fd9a.Hwmon1 \
/xyz/openbmc_project/sensors/temperature/lm75temp \
org.freedesktop.DBus.Properties.Get string:xyz.openbmc_project.Sensor.Value string:Value \
double:
It is not clear to me why the second parameter string:Value
I guessed on that and it works. Perhaps xyz…Sensor.Value is the Property name, and properties have values, so the second parameter says get the Value of a property whose name ends in .Value.
To test that, I tried string:MaxValue, and that works.
I confirmed with this:
busctl introspect xyz.openbmc_project.Hwmon-5a446562b1a2e55ef11da905907088a187a66b71eb7a1f29187594c05bb8fd9a.Hwmon1 /xyz/openbmc_project/sensors/temperature/lm75temp
A very useful command.
Also useful:
dbus-send --system --print-reply \
--dest=xyz.openbmc_project.ObjectMapper /\
xyz/openbmc_project/object_mapper \
xyz.openbmc_project.ObjectMapper.GetSubTree \
string:"/" int32:0 array:string:"xyz.openbmc_project.Sensor.Value"
Mike
Sent from my iPad
> On Jan 10, 2022, at 4:50 PM, Ed Tanous <edtanous@google.com> wrote:
> On Mon, Jan 10, 2022 at 3:47 PM Mike Jones <proclivis@gmail.com> wrote:
>>
>> Hi,
>>
>> I could not find an example of a sensor query in the docs. I assume something like this:
>>
>> dbus-send --system --print-reply \
>>
>> --dest=xyz.openbmc_project.Hwmon-5a446562b1a2e55ef11da905907088a187a66b71eb7a1f29187594c05bb8fd9a.Hwmon1 \
>>
>> /xyz/openbmc_project/sensors/temperature/lm75temp
>>
>> xyz.openbmc_project.Sensor.Property.Get xyz.openbmc_project.Sensor.Value \
>>
>> double:
>
> I don't have an example offhand, but the interface you're looking for
> in the bolded area is
> org.freedesktop.DBus.Properties.Get
>
> Stack overflow for essentially the same question with an example:
> https://stackoverflow.com/questions/48648952/set-get-property-using-dbus-send
>
>>
>> With the bold interface replaced with something correct.
>>
>> Can some one give me an example, and a url about how to query properties?
>>
>> Mike
>>
>> Sent from my iPad
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next reply other threads:[~2022-01-11 17:17 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-11 17:16 Mike Jones [this message]
2022-01-11 17:22 ` Query Sensor Ed Tanous
2022-01-11 17:52 ` Mike Jones
2022-01-12 2:04 ` Ed Tanous
2022-01-13 21:16 ` Mike Jones
2022-01-28 18:30 ` Ed Tanous
-- strict thread matches above, loose matches on Subject: below --
2022-01-10 23:47 Mike Jones
2022-01-10 23:50 ` Ed Tanous
2022-01-11 0:07 ` Mike
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