dumb question ???

[goldriver]

Let say we have an event that triggers on mouvement and turn on a light.

if mouvement detected in room
then turn on light

Does the z-wave plugin check if the light is On before sending the On command ????

Having optimisation in mind how (without a script) how can we avoid z-wave traffic and device solicitation ?

[NetworkGuy]

You could add an "And If" condition to your event for the situation where the light is on/off to keep from sending Z-Wave traffic.

E.g. And If the light is off, Then send On command

[Pete]

With my lighting here do and I don't check.

Just redid my garage lighting (all LED and very daylight like 24/7 if needed) to triggering on any door (garage doors, house entrance doors or exterior door) versus using the PIR(s). Fixes the spider issues and I do not think there are apparitions living in the garage. Using a script with flags to stop the timing or chatty kathy stuff.

[goldriver]

You could add an "And If" condition to your event for the situation where the light is on/off to keep from sending Z-Wave traffic.

E.g. And If the light is off, Then send On command

I know about the And If but should have been more specific, here is my case

IF Motion_kitchen changes and becomes Motion
AND IF The Group Conditions are all TRUE
AND IF The time is daytime (after sunrise, before sunset).
Then Set Timer Delai ON Kitchen_Light to time 0 Seconds
Then Start Timer Delai ON Kitchen_light
Then Run the script:Check_If_light_On.vb

setting the timer is NOT dependant of the light state so this is why I can't use the And If, I had to build a script that use CAPI to get the switch state and turn it on if it's off but I am wondering what is the more system efficient, running a script that check if it is on or let the z-wave send traffic and turn on the switch even if it is already On

[Uncle Michael]

setting the timer is NOT dependant of the light state so this is why I can't use the And If, I had to build a script that use CAPI to get the switch state and turn it on if it's off

If the script does what you want, that is a good option, but for completeness, you should also be aware that you could use an event to do the checking. Instead of running a script, the last action could be to trigger an event if the event conditions are true. The new event would have a manual trigger and a condition that the light is not on. It's action would be to turn the light on.

[goldriver]

If the script does what you want, that is a good option, but for completeness, you should also be aware that you could use an event to do the checking. Instead of running a script, the last action could be to trigger an event if the event conditions are true. The new event would have a manual trigger and a condition that the light is not on. It's action would be to turn the light on.