I don’t (quite) yet have my ST hub. (It should arrive this week), but I’m already thinking of ways I can use it for something beyond an android powered light switch.
One of those areas involves my children. They have this really bad habit of taking hot steamy showers, but not turning on the bathroom exhaust fan. I know I can just wire the fan to the light with a conventional switch, but what fun is that? Anyway, it doesn’t really solve the problem, as the bathroom is still full of steam when they turn off the light.
What I’d like to do is to get some kind of z-wave humidity sensor that’s powered by A/C (not batteries), and 2 z-wave on/off switches. On on/off for the light, and the other for the exhaust fan. Then, set up some kind of ST app or rules so that:
If the bathroom light is on, and the humidity goes over a certain threshold, turn on the exhaust fan. (Don’t turn on the fan if the light is off – the assumption here is that in this case the humidity isn’t from inside the bathroom and the fan wouldn’t do any good.)
When the humidity drops below a certain threshold: if the exhaust fan is ON and bathroom light is already off, turn OFF the exhaust fan.
When the bathroom light is turned off: if the exhaust fan is ON and the humidity is already below a certain threshold, turn OFF the exhaust fan.
I’m sure I could manage the rules with a bit of dev work, but I’m not sure what kind of device to use for the humidity sensor.
Is there a z-wave sensor out there that can be powered from A/C, checks the humidity fairly frequently, and is fairy accurate for humidity readings?
It doesn’t have to be accurate in terms of human readable humidity, as long as its reliable in saying "it’s more humid now than it was before.) (for example: a humidity reading of 1 through 10 should be good enough for this.)
I’d also like to it check the humidity fairly frequently (which is one reason for it to be A/C powered instead of battery powered.) It won’t do much good if it only polls the humidity every 30 minutes! Every 2-3 minutes would probably be sufficient.
Finally, I’d like for it to be z-wave for the simple reason of compatibility. I don’t know what tomorrow brings, but it seems that z-wave (at least) is here to stay. (Perhaps zigbee will stay as well, but so far it appears that zigbee is the betamax to z-wave’s VHS.)
Thanks for any advice,