tree 6ad02a707f607e63cf5c58e4f9eb70451da0c339
parent c95a59e8849832344790c3cc0c62f931d6874077
author Rashmica Gupta <rashmica.g@gmail.com> 1627379011 +1000
committer Rashmica Gupta <rashmica.g@gmail.com> 1628758980 +1000

Support threshold hysteresis

Add support for a hysteresis value on the warning high/low and critical
high/low sensor thresholds.  On the high thresholds, this requires the
sensor value to dip below the (threshold - hysteresis) value before the
alarm clears, and on the low thresholds it has to go above (threshold +
hysteresis).

These are optional fields in the configuration JSON and will default to
zero if not present, which results in the previous behavior of not
having a hysteresis at all.

Tested: with IBM's Ambient_Virtual_Temp sensor. When changing the value
above a high threshold and then back below the threshold, we only see
the alarm deasserted when the temp is below (threshold - hysteresis).

Change-Id: Ied1d40def94e1b66cf4ec8826799bada4e6236ab
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Signed-off-by: Rashmica Gupta <rashmica.g@gmail.com>