meteohub.de

I am sending data to Weather Underground and CWOP. I have a Davis vantage pro 2 with USB datalogger and using the meteobridge to upload data to the servers mentioned. I have sea level pressure displaying on my console. The values on both WU and CWOP were reflecting that. Early this morning around 0100 my pressure values on both servers jumped up to a higher number. These values don't correlate with what is displayed on my console. I am failing the QC at CWOP because of it. Until last night everything was right on the mark. I have a friend that has the vantage vue and also uses the meteobridge who is having the same problem. What do you think the problem might be? My WU ID is KTXHEREF08. My CWOP id is EW9322 or E9322 on Madis. Please let me know any ideas you might have. Thanks!

I wanted to add that I got my first rain tonight with this setup. The rain rate is off from the meteobridge to WU and CWOP. At times it was raining over 3 in/hour. The highest reported on WU was .7" per hour. The rain occurred at about 20:00 on 08-25-2016. My WU id is KTXHEREF08. So to summarize I think there is something amiss with the rain rate and possibly the barometric pressure. I'm not sure to contact about this so if this is not the place please let me know. Also a friend of mine whom has two different Davis vantage vues is having the exact same problem with the pressure and rainfall rate. All three stations are Davis hardware and meteobridge sending the data.

Did you setup station altitude correctly on station tab? What is your stations elevation?

Is timezone set correctly? Having day start defined correctly is a precondition to have daily rain accumulated as expected.

I appear to be having a similar problem while using an AcuRite Pro with the internet bridge. I'm uploading to WUnderground, WeatherForYou, and CWOP. In contrast though, my upload to WUnderground and WeatherForYou both show pressure around 30.11 inHg, which is what I'm showing in Meteobridge. The CWOP data are showing 1052 mb (31.07 inHg), which is *way* too high. My station elevation is set to 6150 ft (Denver, CO area near the mountains) with a pressure correction of 2.13 inHg. Maybe I'm just doing the correction wrong? I'm making the assumption that the correction is applying to the MSL-corrected pressure value, rather than the actual station pressure. An airport ASOS unit nearby me was showing similar pressure at 30.14 inHg when I'd originally set the correction and pressure has fallen since then. As I just setup my station with Meteobridge, I am running whatever the most current build is.

Boris, I'm having issues with my pressure too with the new AcuRite firmware too (I didn't see a problem with the new meteobridge software that supports the new AcuRite firmware, I only saw it once I upgraded my AcuRite firmware).

For years I've had my elevation set to 0 and added in an offset to get the correct pressure. With the updated AcuRite bridge firmware the pressure has changed. What I'm wondering is did something change in the meteobridge software to work with the new AcuRite firmware and is now reporting a different pressure, or did the AcuRite firmware change and it's now reporting a different pressure to the meteobridge software? Something has changed - either the new AcuRite firmware is reporting a different pressure or the new meteobridge software is taking the AcuRite pressure and reporting it differently than it use to.

Any ideas?

I'll add that after further review, it appears that all of my pressure data are out to lunch. On Acu-link.com, with just an offset, everything looks fine, but Wunderground, CWOP, and WFU while initially set correctly now drift wildly. For instance, the correct pressure should be 30.28 inHg, but is currently being reported as 30.5 to WU and WFU and 1059.4 hPa to CWOP.

It has been reported that the new AcuRite firmware actually can change the reported pressure (instead of just reporting the raw pressure). On your MyAcuRite page, if you check Adjusted Pressure the firmware will adjust the raw pressure based on your elevation. If you select Station Pressure it should just report the raw pressure.

I had Station Pressure selected and still had a WU/CWOP/etc. pressure that was far different than what it was before the firmware update. I started working with the meteobridge settings and am zeroing in on setting that will get me back to good reporting again.

I'm still on the old firmware and AcuLink platform.

Ok, so I think I figured out part of the equation. The pressure correction term actually applies to the station pressure. Using this calculator from the NWS and the station closest to my house along with my known altitude of 6150 ft, my station pressure ought to read 807.5 mb when MSLP is the standard atmosphere value of 1013.25 mb. When I use the current MSLP value < 5 miles from my house of 1029.8 mb, that makes my station pressure 820.5 mb. For whatever reason, the station pressure that my AcuRite Bridge reports to metobridge is 776.5 mb. When I apply a 44 mb correction term using 6150 ft, I am getting 1009.7 mb rather than the expected value of 1029.8 mb for an MSLP value in meteobridge. Does the formula for calculating MSLP from station pressure have an error? Station pressure to MSLP formula

Setting my station's elevation to 6735 ft gives me the correct station pressure to MSLP conversion, but that's 585 ft higher than my actual elevation. There's also definitely still a problem with upload to CWOP, as it's slightly more realistic (had been up to 1060 mb before this correction), but still being reported as 1050.5 mb vs 1029.8 mb as it should be. Interestingly, if I work the same method as above, but targeting 1050.5 mb as MSLP with the elevation at 6735 ft, I get a station pressure of around 819 mb. Makes me think that there is a different conversion happening for station pressure to MSLP for the CWOP output than there is for the other networks and local storage and the one for CWOP is actually calculating based on elevation correctly. So by artificially increasing my elevation for the other networks and local storage, it's messing up the CWOP calculation.

And to completely confuse the issue, I rebooted my meteobridge today and the local storage and WFU/WU uploads now show MSLP 10 mb or 0.2 inHg lower than before the reboot, while the CWOP upload still shows around the same value as before the reboot with the same elevation and pressure corrections. Something is definitely not right.

I just got the email inviting me to change over to the MyAcuRite platform and the SmartHub firmware for the bridge device. Should I upgrade at this point, or should I hold off until the current issue is fixed?

For me the BP changed when I went with the new SmartHUB firmware...

Updated to the SmartHub firmware, but pressure is still out to lunch.

Is there really no update on this from the developer, especially on the CWOP vs other network uploads!? I'm starting to regret paying for a license.

I have mine working.

In MyAcuRite I set the Pressure Type to Station Pressure and on the meteobridge on the Weather Station tab I set my Station Elevation and Pressure Correction to 0. I then waited a day to see the reporting from CWOP and based on their analysis (you can download their numbers into a spreadsheet) I changed my Pressure Correction (in mbar/hPa - which is what CWOP reports). I think I waited a couple more days and tweaked the Pressure Correction again.

I'll probably make another very small tweak on the Pressure Correction (I'm at Average barometer error: -0.4 milliBars , Error standard deviation: 0.5 milliBars), but I'm already back to a 100% MADIS Rating.

Fortunately we have the meteobridge which allows us to adjust the numbers that are sent to WU and CWOP and many other places. It's my understanding that the current AcuRite firmware version doesn't send their adjusted number to WU (something they'll probably fix in a future firmware update).

Just an FYI - if you have Adjusted Pressure selected in MyAcuRite then the new AcuRite firmware reports using the altitude that it thinks your station is located for reporting from the hub (in the past they made the adjustment on their web site). If you also have an altitude in meteobridge then it adjusts the pressure too which will give you a bad reading. Since the adjustments from AcuRite are limited I set it to Station Pressure to zero (so the AcuRite firmware won't adjust its numbers) and set my real altitude in meteobridge and used its fine adjustments and CWOP to zero in on my pressure reporting.