* Default to null for group yaml discovery.
* Update test data for a154bda yaml group null fix.
* Changes to guessed limit functions for sensors.
Original behaviour
===================
The file `includes/discovery/functions.inc.php` contains
`sensor_limit_low()` and `sensor_limit()` which both attempt to
guess a sane value for sensors when no explicitly defined
low_limit or high_limit can be found during discovery.
Both switch control structures used in those two functions
have empty case statements which means that if one of those matches,
it's going to fall through and run the code for each subsequent
case until a `break` is reached.
For example, when we call `function sensor_low_limit(dbm, -13.036)`
it will return the value `-12.3842` instead of `null`. That is
because there will be a match at `case 'dbm':` which falls through
all the way to `case 'cooling':`, where it performs
`$limit = -13.036 * 0.95` before hitting a `break`.
Changed behaviour
===================
Removed `power_consumed` and `count` guessed low_limit and
high_limit, I personally added those sensor classes in PR #9471
when I didn't understand that a switch control structure has
fall-through behaviour so I can guarantee that guessing limits for
those is a mistake on my behalf. It should not be there, only
power_factor can have guessed limits. Apologies for the issue,
I'm still a beginning programmer!
Furthermore, I removed guessed high_limit values for `current`
and `power` because these are supposed to draw higher values as
more devices or components are installed on for example a PDU or
a chassis.
Finally, I removed guessed low_limit and high_limit for `dbm`
sensors, there is a much too large variance in power budget on
commercially available optical transceivers for there to be a
sensible window where you can guess these values.
* Documentation on adding sensor classes.
* Update test data - sensor limit changes @ 30212d2
Improves visual identification for sensors
- [x] Docs
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* target db_schema
* Database schema cleanup
Remove several inconsistencies (mostly with data types and lengths)
Make things a bit nicer to implement with Laravel database migrations.
poller* tables had f'd up indexes
* Update tests, extra noise because db returns numeric types now.
* Update test data again.
* fix 253 migration for mysql 5.3
* fix like and is null operators
* Add between operator support
* Can't have one if ($expand) clause
* fix up empty, add tests
* Use single quotes for strings
* Fix moxa sensors order
* Fixed travis
* newdevice: add support for Moxa EDS-P510A-8PoE
Support PoE port consumption, SFP module monitoring and power input statuses for Moxa EDS-P510A-8PoE industrial switch.
* Add Moxa EDS-P510A-8PoE MIB
* Rename MOXA-EDSP510A_8POE-V3.7-MIB.my to MOXA-EDSP510A_8POE-V3.7-MIB
* Update moxa-etherdevice.yaml
Moved MIB definitions to the top as proposed by @laf
* Create moxa-etherdevice_edsp510a8poe.snmprec
* Create moxa-etherdevice_edsp510a8poe.json
* Rename MOXA-EDSP510A_8POE-V3.7-MIB to MOXA-EDSP510A8POE-MIB
