Faking Sensor Readings

[James Feist]

On 12/11/19 1:14 AM, rgrs wrote:
> Hi James,
> 
> I don't see any results for the grep command.
> 
> Our platform was built referencing Witherspoon IIRC.
> 
> Below links were used during porting,
> 
> https://github.com/openbmc/docs/blob/master/development/add-new-system.md
> 
> https://developer.ibm.com/linuxonpower/2019/01/07/how-to-port-openbmc/
> 
> I don't see "entity manager" being used in above links. Is it something specific to Intel servers?

Entity-manager is here: https://github.com/openbmc/entity-manager, there 
is a readme checked in with some basic information.

There is also a guide here for adding your first sensors: 
https://github.com/openbmc/entity-manager/blob/master/docs/my_first_sensors.md

Configuration files are here: 
https://github.com/openbmc/entity-manager/tree/master/configurations

First step is to add dbus-sensors and entity-manager to your image like 
the earlier provided links.

Thanks,

James






> 
> If I were to port a new board today, which is the reference platform or guide to refer?
> 
> Thx,
> Raj
> 
> 
> 
> 
> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> On Monday, December 9, 2019 11:58 PM, James Feist <james.feist at linux.intel.com> wrote:
> 
>> On 12/6/19 3:32 AM, rgrs wrote:
>>
>>> Hi,
>>> I dont see any new service even after adding dbus-sensors.
>>> Please can you point to any platform in upstream that I can refer to?
>>
>> https://github.com/openbmc/meta-intel/blob/daa333d956ad9391abcbb85468d9bc9f26ee1190/meta-common/recipes-intel/packagegroups/packagegroup-intel-apps.bb#L43
>>
>> https://github.com/openbmc/meta-facebook/blob/master/meta-tiogapass/recipes-fbtp/packagegroups/packagegroup-fb-apps.bb
>>
>> If you do a ps do you see any of the sensor daemons running?
>>
>> root at intel-obmc:~# ps | grep -i sensor
>> 332 root 6008 S /usr/bin/adcsensor
>> 333 root 6356 S /usr/bin/cpusensor
>> 334 root 5784 S /usr/bin/exitairtempsensor
>> 335 root 5696 S /usr/bin/fansensor
>> 336 root 5608 S /usr/bin/hwmontempsensor
>> 337 root 5660 S intrusionsensor
>> 339 root 5716 S /usr/bin/ipmbsensor
>> 340 root 5512 S /usr/bin/mcutempsensor
>> 341 root 5868 S /usr/bin/psusensor
>> 588 root 2776 S grep -i sensor
>> root at intel-obmc:~#
>>
>> If so then you'll need to add entity-manager configurations like these:
>>
>> https://github.com/openbmc/entity-manager/blob/7d807754cc9153b04b599804464edd9654d7a81e/configurations/WFT Baseboard.json#L2023
>>
>> Thanks
>>
>> James
>>
>>> Thanks,
>>> Raj
>>> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
>>> On Wednesday, December 4, 2019 10:40 PM, James Feist james.feist at linux.intel.com wrote:
>>>
>>>> On 12/4/19 1:39 AM, rgrs wrote:
>>>>
>>>>> Hi James,
>>>>> I tried busctl set-property, but the values didn't change.
>>>>> Are the steps below correct?
>>>>> (test with both 'field mode' enabled and disabled)
>>>>> root at obmc:~# busctl introspect xyz.openbmc_project.Hwmon-2439434288.Hwmon1 /xyz/openbmc_project/sensors/temperature/INLET_TEMP xyz.openbmc_project.Sensor.Value --no-pager
>>>>> NAME TYPE SIGNATURE RESULT/VALUE FLAGS
>>>>> .MaxValue property x 0 emits-change writable
>>>>> .MinValue property x 0 emits-change writable
>>>>> .Scale property x -3 emits-change writable
>>>>> .Unit property s "xyz.openbmc_project.Sensor.Value.Unit.… emits-change writable
>>>>
>>>> This looks like phosphor-hwmon, not dbus-sensors
>>>> https://github.com/openbmc/dbus-sensors.
>>>>
>>>>> .Value property x 18500 emits-change writable
>>>>> root at obmc:~# busctl --no-pager set-property xyz.openbmc_project.Hwmon-2439434288.Hwmon1 /xyz/openbmc_project/sensors/temperature/INLET_TEMP xyz.openbmc_project.Sensor.Value Value x 50000
>>>>> root at saber:~# busctl --no-pager get-property xyz.openbmc_project.Hwmon-2439434288.Hwmon1 /xyz/openbmc_project/sensors/temperature/INLET_TEMP xyz.openbmc_project.Sensor.Value Value
>>>>> x 18500
>>>>> root at obmc:~#
>>>>> Thanks,
>>>>> Raj
>>>>> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
>>>>> On Wednesday, December 4, 2019 1:34 AM, James Feist james.feist at linux.intel.com wrote:
>>>>>
>>>>>> On 12/3/19 5:49 AM, Alexander Amelkin wrote:
>>>>>>
>>>>>>> 03.12.2019 15:06, rgrs wrote:
>>>>>>>
>>>>>>>> Hi,
>>>>>>>> How do I fake sensor readings in OpenBMC?
>>>>>>>> We're trying to fake temperature sensors and make sure fans ramp up/down
>>>>>>>> accordingly.
>>>>>>>
>>>>>>> We ended up patching the kernel driver to fake the readings by request.
>>>>>>> I'm not aware of any ready interface in OpenBMC for that.
>>>>>>
>>>>>> If you're using d-bus sensors, the sensor property is writable. It is
>>>>>> also supported by patching the sensor value in redfish.
>>>>>>
>>>>>>> With best regards,
>>>>>>> Alexander Amelkin
>>>>>>> /james.feist at linux.intel.com
> 
>