If I forcefully breathe out on my top off sensor box
I get the humidity reading goes up to 100%
and then drops back again
Just tried the breath test. I too got the humidity sensor to go up and the temperature as well. But then as the humidity hit 97% it took a nose dive to 50%. And it was showing my breath to be almost 112 Deg. F (see Capture1). I’m also attaching the graph which shows the effect of the AC on this sensor (see Capture2). If I’m not mistaken, it shows the trend to be as AC cooled air temp drops, humidity rises (which is backwards from reality, right?). Is is possible for you do duplicate my AC test?
Thanks
only a de humidifier will drop the humidity
an air conditioner, which is just dropping the temperature, will increase the relative humidity (to keep the dew point the same)
Hi Brian,
When you’re right you’re right. Last night I located the all-in-one sensor outside to record 12 hours of data (see Capture BB). The white graph line is the all-in-one sensor outside temp. The lime green graph line is the outside temp taken with an iButtonLink temp sensor. Even though the scales are different, the side by side located sensors were within 2 Deg. F of each other. The olive green graph line is the all-in-one sensor outside humidity. It appears to have recorded the humidity as expected. I have another occurrence of WD running about 50 feet away using all Hobby Board sensors (see CaptureCC) and the humidity data corresponds to the all-in-one sensor very closely. So it looks like we’re close to done. Job well done on your part as usual.
At this time Brian, I would ask one more thing based on the appearance of these graphs. Even though the spiky nature of the all-in-one sensor humidity and temp are probably a result of Embedded Data Systems circuit, is it possible to massage the data with an algorithm to smooth out the graphed data? Just asking.
Thanks again
Sorry. Should have done this on the previous post. I adjusted the scale for a better graphical image. Again this shows the all-in-one sensor’s temp and humidity along with an iButtonLink temp sensor hanging outside a window.
Update: go to next page.
Oops. Wrong capture. Here’s the right one.
I see now that I have the indoor temperature wrong
I was using the humidex value
I will get a new update out
(one problem is that my Davis console reads a bit high as I have the back light on)
Good catch. Standing by.
use vers 4.1
http://www.weather-display.com/downloadfiles/HB1wirereader.zip
David sent me a OW-server ethernet
so that I could see what the values should be
temperature and humidity match those
I now have the barometer matching that too (no need to apply such a big offset now) , and having it showing to 2 decimal places (its very sensitive sensor)
I have that corresponding well…not sure if exactly correct…for that extra decimal place.very close…maybe .03 out…lots of bit wise manipulation was needed…tracks as expected…I might be able to perfect more yet
any bitwise experts out there, in what bitwise manipulation needed on the 3 values as per the attached chart
(the data is over lapping and shifted by 4 bit to get the 2 decimal place data)
HB 1 Wire reader V 4.1 loaded. Nothing strange so far. I see you’ve introduced lux sensor data now. Might be useful somewhere down the road.
I have the barometer working correctly now…with help from David
download a new update again (same URL)
will see about getting the lux to work correctly (that data does not flow to WD at this stage)
Brian,
Prior to this last update, the all-in-one barometer was dead nuts on compared to a Hobby Boards baro I have (all day). What’s new and improved? I did install the latest HB 1 Wire Reader though.
it was not quite correct, the calculation I had, believe me
just another update, where the LUX should be working OK now
Latest update installed. All continues to look well. LUX sensor is very responsive based on the amount of light I allow it to receive. It looks like the minimum value is 0 for total darkness. What’s the theoretical max the sensor will report? Also, will you add a LUX reading on the main page? It seems to be a nice solution to a problem which hasn’t be identified yet.
putting the device in full sunlight to get sun reading would mean the indoor temperature would be useless
No argument here. I intend to mount the all-in-one sensor in a centrally located hallway next to the house thermostat. No chance of sunlight hitting it. Just ambient light levels rising and falling over the course of a day. It would be a “fun” item to monitor (as us geeks like to do) but absolutely not a necessity. So is this sensor 100% good to go now for mass consumption or should we run it for a week just to be sure?
I could make a custom tag for that lux reading
yes its ready for someone else to use
Brian,
You’re a hoot. I’m sure someONE else will find this to be a nifty sensor. Thanks so much for your indulgence on this project. Greatly appreciated. When you’re done adding the custom tag, please let me know where it can be found.
I have added %OW-ENV-THPLlux% custom tag to the latest .zip update (which includes the latest HB1wirereader program to get that tag data to WD)
I now need to spend my efforts on the wdxmlwarning program and also adding remote control to the 1wreader program