Search found 140 matches

by d_l
Fri Feb 12, 2021 11:57 pm
Forum: misc
Topic: New monitor - justified or not?
Replies: 1
Views: 1446

Re: New monitor - justified or not?

I have Meteohub results displayed on two Surface Pros: one several month old and the other six years old, but my Meteohub results - graphs - are posted to my weather website. If you had your Meteohub results posted on an external website or some sort of internal website that you set up on your compu...
by d_l
Thu Feb 04, 2021 7:41 pm
Forum: misc
Topic: Plottable cloud base heights calculated by a virtual sensor
Replies: 3
Views: 5626

Re: Plottable cloud base heights calculated by a virtual sensor

There is probably less error in the cloud's minimum base heights due to rounding than there is due to the relative humidity measurements. Note the variations/errors in relative humidity measurements may be due to the sensor's accuracy or due to air currents mixing in drier than is present locally. T...
by d_l
Fri Nov 06, 2020 7:24 pm
Forum: Graph Definitions
Topic: Collected Gnuplot commands for Meteohub
Replies: 13
Views: 18134

Re: Collected Gnuplot commands for Meteohub

" the ability to create transparent graphs does not work there " Of course transparent graphs work, have you not read my posts above this showing transparent graphs overlaid on photos? There is a listing of set commands necessary to produce the transparent GIF graphs. Sometimes I favor transparent G...
by d_l
Wed Jul 01, 2020 7:31 am
Forum: Meteohub Application
Topic: Mathematical operations
Replies: 7
Views: 1580

Re: Mathematical operations

One more try at your problem. You might take a look at this math formula on page 73 of the manual: "{math- val1 val2 ... valn}" subtracts enclosed values from position two on from number at position 1. For example, "{math- 2 5 -1}" returns "-2.00". Computation: (2 - 5) - (-1) You would have to get y...
by d_l
Tue Jun 30, 2020 5:24 pm
Forum: Meteohub Application
Topic: Mathematical operations
Replies: 7
Views: 1580

Re: Mathematical operations

If you have a website, you could output the two values as a txt file and then use a little PHP program to handle the subtraction. This would be somewhat similar to the way the Revised Chandler Burning Index: https://forum.meteohub.de/viewtopic.php?f=9&t=14614 is handled, except the calculations woul...
by d_l
Sun Jun 28, 2020 8:33 pm
Forum: Meteohub Application
Topic: Mathematical operations
Replies: 7
Views: 1580

Re: Mathematical operations

I could be wrong but I don't think there is any way to do what you want The Meteohub has only limited ability to manipulate actual square bracket weather data values. See the Meteohub manual v4.7 pages 71-73.

There may be other ways handle the calculation. What is the result to be used for?
by d_l
Fri Mar 27, 2020 12:34 am
Forum: Graph Definitions
Topic: Collected Gnuplot commands for Meteohub
Replies: 13
Views: 18134

Re: Collected Gnuplot commands for Meteohub

It is most unfortunate that the http://www.gnuplot.info website rearranged their links to make Vetinari's collected links broken. I accidentally obliterated some Meteohub graph definitions and started over trying to find a replacement for Vetinari's work. The best that I have found so far is http://...
by d_l
Thu Jan 23, 2020 10:53 pm
Forum: misc
Topic: Plottable cloud base heights calculated by a virtual sensor
Replies: 3
Views: 5626

Plottable cloud base heights calculated by a virtual sensor

While the minimum cloud base is calculated by the Meteohub and can be displayed as text by the [actual_th0_cloudheight_f] name-pair, this ouput is not readily plottable (AFAIK). If you wish to plot cloud base heights over a period of time, you will need to make a virtual sensor to produce that data ...
by d_l
Sat Jan 18, 2020 11:34 pm
Forum: misc
Topic: Revised Chandler Burning Index calculated by a virtual sensor
Replies: 0
Views: 1613

Revised Chandler Burning Index calculated by a virtual sensor

I previously had posted a way to compute the Chandler Burning Index with a virtual sensor. On another weather forum, it was suggested that the CBI should never be below 0 or above 100 even though the raw formula will calculate these extremes under certain weather conditions. Note that there is anoth...
by d_l
Thu Jul 12, 2018 9:06 pm
Forum: misc
Topic: FTP to two(2) webservers?
Replies: 1
Views: 2289

Re: FTP to two(2) webservers?

You probably won't like this suggestion, but you could probably do it with two Meteohub servers. I'm guessing that you are computing different values and inserting them into the two txt files. If you used two servers, the second would link to the first to obtain its raw weather data. I have to do so...
by d_l
Wed Jul 26, 2017 5:49 pm
Forum: misc
Topic: Chandler Burning Index computed by a virtual sensor
Replies: 0
Views: 2121

Chandler Burning Index computed by a virtual sensor

I wanted to compute the Chandler Burning Index with a virtual sensor. It took more than a few trial-and-error attempts to get it to work and I thought others might be interested in a "how-to". First of all, this computation is using Meteohub version 4.6t (I don't update often). For your virtual sens...
by d_l
Sun Mar 18, 2012 6:47 pm
Forum: Vantage
Topic: WeatherLink Mobile
Replies: 3
Views: 2992

Re: WeatherLink Mobile

I also use the Meteohub with two WLIPs connected to two Envoys. The Meteohub generally handles the WLIP well; however, there can be drop outs that the MH doesn't always correctly handle. Problems I've seen: I think the MH can cause slight delays (5-15) in the updates to wl.com at times. There can be...
by d_l
Thu Jan 19, 2012 8:53 pm
Forum: Vantage
Topic: THSW index
Replies: 18
Views: 12422

Re: THSW index

Do you think Davis would mind if I load it onto my webserver and grant access for download for people of our community? I don't know. It probably would be ok as long as you referenced the more recent AN 28.pdf and also mentioned that some of the look up tables and formulas might be revised in the l...
by d_l
Wed Jan 18, 2012 12:00 am
Forum: Vantage
Topic: THSW index
Replies: 18
Views: 12422

Re: THSW index

Hathor27 wrote: Have you got my private message?
Oops, I'd overlooked it. The whole PDF is the VP1 version of AN 28 and only in a few instances such as THSW index calculations does it differ at all from the information contained in AN 28. For some reason, it is vastly more bloated in size than the AN 28. pdf.
by d_l
Wed Jan 11, 2012 3:57 am
Forum: Meteohub Application
Topic: Bug in virtual sensors command line?
Replies: 8
Views: 4139

Re: Bug in virtual sensors command line?

I've a command line of 158 characters that I can scroll to the end. This is on 4.6t. I doubt that Boris reduced that field for newer versions. Scrolling using FF 4.0.1. I don't update that frequently unless there is a good reason.