New Feature: 1-Wire Humidity Sensor Unofficial Support

[autelis]

In addition to the 1-Wire Temperature Sensor support, 1-Wire Humidity Sensors are now (unofficially) supported by the Universal RS232 Serial Port Adapter. Unofficial because they have some minor additional hardware requirements (level-shifter, power supply).

 

Please see the following thread for more information on what is required to interface these sensors to our device:

 

http://www.autelis.com/forum/viewtopic.php?f=10&t=125

[arw01]

I'm interested. Currently embarking on ir integration of my standard remotes versus an universal remote, but I still have a number of 1 wire units scattered around the house. I think i took the ones out of my furnace vents, but they might be going back in since it would assist in running the fan longer as long as there was some residual heat in there.

[apostolakisl]

I'm interested. Currently embarking on ir integration of my standard remotes versus an universal remote, but I still have a number of 1 wire units scattered around the house. I think i took the ones out of my furnace vents, but they might be going back in since it would assist in running the fan longer as long as there was some residual heat in there.

 

Where is your hvac air handler and your ducts? If they are inside the insulated envelope of your house, running the fan longer doesn't do any good. It's only of value if the ducts run through an uninsulated attic, basement, etc.

[arw01]

It would help push some warmer air from the ducts out to the edges of some bedrooms, they are not well insulated in this lovely 1955 rancher. If the temp difference from the returning air starts to drop too close to the outgoing supply air after flowing over the coils etc, then I shut down the fan.

 

Found out today that I apparently have a like a 4 speed fan according the HVAC fellow I had out. Have to figure that out with a thermostat someday!

 

Alan

[apostolakisl]

Having the fan run does help with keeping temp balanced in a home with areas that loose heat way faster than other rooms. In the event that your ducts and hvac are inside the insulated envelope, you should run the fan all the time to keep things balanced during the times when things get unbalanced (when it is cold out). If the ducts are outside the insulation (like in the attic) it tends to be counterproductive since the ducts aren't all that well insulated, so they kind of act like radiators in the attic (or whatever uninsulated space) radiating your heat out of the house and cooling the air inside the duct which then gets blown into the house.

 

Since the goal of any hvac system is to keep the people inside the house comfortable, it would be more productive to monitor the temps in all the different areas and use the fan and furnace based on those temps, not the temps inside the ducts. Using dampers and custom algorithms to divert air to the areas that most need it is the best way to do this.

 

Strictly from a cost efficiency standpoint, btu to btu, it costs you more money to run the fan when the furnace burners are off (again with ducts inside the insulated house). Unless you are using electric resistance heat, then it is about equal.

[IndyMike]

arw01,

 

A 4-speed fan does not necessarily mean that it is high efficiency. I also have a 4 speed unit. In low speed continuous mode it pulls 600W. I'm not sure whether you are trying to achieve comfort or efficiency.

[johnnyt]

In addition to the 1-Wire Temperature Sensor support, 1-Wire Humidity Sensors are now (unofficially) supported by the Universal RS232 Serial Port Adapter. Unofficial because they have some minor additional hardware requirements (level-shifter, power supply).

 

Please see the following thread for more information on what is required to interface these sensors to our device:

 

http://www.autelis.com/forum/viewtopic.php?f=10&t=125

Interesting that the guy went with the Midon Design temp and humidity sensor but not the Midon Design TEMP08, which handles the polling and which the Autelis RS232-to-ISY bridge can easily capture/filter into a user configurable ISY variable. Is there a benefit to doing it using what seems like the hard way? (just because I found it quite easy myself to set up rules - after some initial guidance from Autelis - off the TEMP08)

 

 

Sent from my iPod touch using Tapatalk

[autelis]

We think this method would be considered the easier/preferred way for the following reasons:

 

• The TEMP08 is an additional expense vs the very cheap level-shifter & power supply.
   
  While setting up the rules should be easy as you noted, via this method no setup is required.
   
  The serial port and rules function is still free to be used for another application/device.

 

Thanks.

[johnnyt]

Thanks. Will look into it more. Would also be one less complicated device to break (even though my temp08 has been rock solid for close to 10 yrs now)

 

 

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