I Moved 1,500 miles, and Smarthub is Way Off on Pressure...

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  • Updated 10 months ago
Is there a procedure I should follow for this-- do I need to reset the thing or something else??  My new location is about 500 - 600 feet higher than the old one. 
MyAcurite pressure:  30.71
WU reported pressure:  28.70
Nearby stations (on WU): 30.26 to 30.29
Nearest official NWS station with pressure: 30.28
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Keith Schumacher

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  • a little irritated...

Posted 10 months ago

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John Z

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WU will adjust pressure to better relate to nearby stations. Give it a little time.
You can enter a correction value for MyAcuRite, but that will not convey to WU. They do their own thing.
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Keith Schumacher

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LOL--  I don't think that means too much. I got the "Gold Emblem" within a few hours.  Not sure if it used my old WU station status (same equipment) and continued it with the new one.  That bad pressure reading should have negated any "accuracy" badge....

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John Z

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Yeah, the WU bot may be a little flaky. I got credited in one day and then denied /restored several times in a couple of weeks. Still, my system is serving me well, on MyAcuRite, and on WU. I don't think your move will become a fail-defining event, just be a bit patient.
(Edited)
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AcuRite Jennifer

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Hello Keith,

Right now we are seeing you are reading 28.38 on My AcuRite and 29.94 on Weather Underground. Which pressure reading is correct? We see you had station pressure selected and switched it to Adjusted. Any calibrations that are made on My AcuRite will not transfer to Weather Underground.

I removed the address information, and entered it back in to push the readings down, and you had your elevation set at 1709, and when I enter the zip code back in it says the elevation is 1705. What is the correct elevation for where you are located?
(Edited)
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Keith Schumacher

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The correct elevation is dependent on which part of the property you are on--  it is sloped and loses about 9 feet from one end to the other.  ;-)  I doubt 3 or 4 feet +/- would really make a truly significant difference in pressure readings though.  So--  should the elevation be the location of the SmartHub itself?  If so, an elevation of 1706 is probably most accurate, but it's really difficult to tell.  

Since I made that change, here are the readings:

MyAcurite: 30.21
WU:  31.75
WU Average for area stations:  29.94 to 29.96 
NWS station (KPIR): 29.94

The NWS station is about 1.5 miles away, and reports pressure for the airport and aviation purposes.  I imagine that is the most accurate reading in the area.
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AcuRite Tori

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Hello Keith,
When viewing other stations around you we do see that you are reading a similar barometric pressure. The readings on your smartHUB and display will not match. The reason for this is because the display goes through a 14-33 day learning mode which uses an algorithm to determine your altitude and calculate your pressure, and forecasting. The readings on My AcuRite come from your smartHUB, and take your geo-location that was entered and provides with your elevation, and can instantly give accurate pressure readings. The adjusted pressure is a pressure that is calculated based off your altitude. Thank you.
 
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George D. Nincehelser

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You need to change the device location (SmartHUB) in myAcurite.  Be aware that this is different than the account location.
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John Z

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Good catch, George. Hope that fixes things.
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Keith Schumacher

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Yes--  Location was set first thing.  I should have mentioned that I did do that when I plugged it all in again. 
My old 5-in-1 outdoor sensor unit was trashed in the move (long story).  It did work well for several years, so I went ahead and bought the "heavy duty" version with 2 solar panels, along with a few more temp/humidity sensors. 
I never questioned the pressure reading in California.  Here in South Dakota, it clearly is off.  I guess I will just have to wait for WU to calibrate.  If you guys have any other ideas for me to try--  let me know.
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Simon Hales

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As George said you need to set your location. Go to MyAcurite==>Settings==>Devices Select SmartHub and click the edit button. You can set your location and altitude on this screen.
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Keith Schumacher

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Simon--  my direct IP link does not look like yours at all, and does not have the same info present.  I can see the Lat/Long. info and elevation at MyAcurite though....  I can post that.




here is the relevant info from MyAcurite...
(Edited)
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John Z

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Keith,

My screen looks like yours. You and I run "bridges" that have been migrated via firmware push to become "smartHUBs". Simon runs a device that was made and sold as a "smartHUB" after the migration. We all run the same application firmware ( v. 224), and so our devices basically do the same job, but have different vintages of boot-loader firmware, where the "splash page" resides.

Do you prefer the Station Pressure choice over Adjusted Pressure? I choose Adjusted Pressure, and let MyAcuRite recalculate to sea-level elevation. That makes for a better comparison to other sources, as it is the standard way of weather reporting.

Keith and Simon,

You guys will probably have image data made obscure soon by Support, and may get a little lecture about protecting MAC addresses and PW's. Be cautious!
(Edited)
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George D. Nincehelser

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The reason wunderground has a low pressure is that you have your SmartHUB set up for "station" pressure (sometimes called "absolute").

You've got a manual adjustment set, but that only impacts myAcurite.  The manual adjustment will not be sent to wunderground.

If you change the SmartHUB setup to "adjusted" rather than "station", then it will send a pressure adjusted based on your elevation.  (Commonly called "altimeter")

I'd suggest you try removing any manual adjustment (affecting myAcurite) and then set your SmartHUB up for "adjusted" pressure.  That should get your wunderground pressure closer to what you're looking for.

The only fly in the ointment is if your particular baro sensor in the SmartHUB has a "bias" in its reading.  This seems to be more common on older bridge hardware.  It's not a huge deal, but it causes the reading to be a fixed amount too high or low.  At present the only way I know to correct it is to fiddle with your elevation setting.  (Interestingly, the old "learning method" used in the old MBW fixed any bias problem automatically through averaging, so most were blissfully unaware their hardware had a bias.)

Or you could just leave everything at "station" pressure, make a manual adjustment for myAcurite, and let wunderground eventually apply their own adjustment.
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Keith Schumacher

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Excellent suggestion George....  I will give that a go...
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AcuRite Rachell, Employee

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Hello Keith,
I also recommend changing the pressure from Station to Adjusted.  Adjusted pressure will take the address information entered into my AcuRite and the sensor inside the smartHUB and provide you with an adjusted reading. Please let the adjustment sit for at least 30 minutes.  Please let us know once the barometric pressure has had time to adjust.  Thank you.
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Keith Schumacher

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Just an update almost a week later. 

Currently on MyAcurite, the pressure reading is consistently 0.25 above the NWS official reading less than 2 miles away.  Weather Underground is WAY off-- at 1.80 above the NWS reading.

I wish there was a way to hack this thing and force my own adjustment that would be reflected in both sites.  It is still a strange thing that these values are so far off.  So--  has anyone hacked their Smart Hub?

EDIT:  I just read the thread about intercepting/modifying the data feed from a smart hub.  Interesting.
(Edited)
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AcuRite Tori

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Hello Keith,

 We would like to look further into this for you. Thank you for your patience.
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Keith Schumacher

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That would be great--  incorporating a simple adjustment at the firmware level would really be a great step.  I think most of the people using this device are tech-savvy enough to do their own calibrations.  We typically are accuracy nerds right?  :)  Perhaps in a future firmware update... 
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George D. Nincehelser

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It's only one of two settings. 

It can take as long as a month for wunderground to adjust.  It would be best if you send them email asking to be excluded from the adjustment.  

Otherwise you'll just be chasing your tail making adjustments.