Testing Phosphor-pid-control

[Tanous, Ed]

Assuming you’re using dbus-sensors (which I’m pretty sure you are):

Support for overriding sensor values was recently landed in this commit:
https://gerrit.openbmc-project.xyz/#/c/openbmc/dbus-sensors/+/16177/

Overriding a sensor value with a "fake" sensor reading should be as easy as simply calling SetProperty on the dbus interface.

Example as tested on my system (your path names may vary)
dbus-send --system --print-reply --dest=xyz.openbmc_project.CPUSensor /xyz/openbmc_project/sensors/temperature/Core_1_CPU0 org.freedesktop.DBus.Properties.Set string:xyz.openbmc_project.Sensor.Value string:Value variant:double:1.0

and verify by reading it back out:

dbus-send --system --print-reply --dest=xyz.openbmc_project.CPUSensor /xyz/openbmc_project/sensors/temperature/Core_1_CPU0 org.freedesktop.DBus.Properties.GetAll string:xyz.openbmc_project.Sensor.Value

method return time=1543267812.458169 sender=:1.16 -> destination=:1.153 serial=6398 reply_serial=2
   array [
      dict entry(
         string "MaxValue"
         variant             double 127
      )
      dict entry(
         string "MinValue"
         variant             double -128
      )
      dict entry(
         string "Value"
         variant             double 1
      )
   ]