my air conditioning system do not have comunication with wall thermostats… but I would like to use a thermostat in my living room wall to set the temperature without I use remote control or even vera to send a IR code…
thus:
I set the temperature in thermostat and vera receives this temperature…and send a IR command to my air to put that in the desired temperature…
my thermostat will not linked to the air conditioning to set the temperature, but will send to vera new set and vera send the command to air conditioning.
is it possible ? or thermostat only works if that one are linked to the air conditioning system ?
I think in use Nest…or the best for integration with vera.
Sure; you could trigger when the COOL setpoint is changed, and run a small Luup script that issues a command to your IR device. Depending on your thermostat, it may wait until the next polling cycle to notice the change in the cool setpoint, and some thermostats may not have a trigger built in for setpoint changes (the Nest does, however). Or, in the alternative, the PLEG plugin is useful for doing more forms of automation than what is provided by Vera out of the box. So yes; it’s possible, but it depends a bit on which thermostat you’re using for the best approach.
…but now that I think of it, if the Nest does not think there is an AC system attached, it may disable the ability to switch the system to cooling mode. You may still change the cooling setpoint slider, so this may not be a problem. I’m pretty sure there is a way to do what you’re after, but it may take some exploration.
The Nest plugin can take up to the polling time (default two minutes) to learn of changes. Other thermostat integrations can be much faster.
Correction: if you change the setpoint from Vera, it will usually take about five seconds for Vera to see the change. If you instead change it from your thermostat directly or one of the native web/mobile interfaces, it can take up to two minutes.
But regardless of thermostat, can you send the cooling setpoint value over infrared to your AC unit? If so, you can use the setpoint value from your real thermostat by querying the thermostat’s Luup device for it.
I understand that you can send IR codes, but my thought was, does your AC unit have an IR code for setting the target temperature, and not only ON and OFF codes? If the answer is yes, then your existing thermostat that’s integrated to Vera could be asked for its current cooling setpoint, which your Luup code could then send along to your AC unit via IR. If your AC unit does not have an IR code to set the target cooling temperature, then my idea won’t work.