Topic: Thinking about a data logger...

[NK7Z]

Hi,
I am thinking of getting a datalogger for my VP2 weather station.  I understand there are at least two loggers available...  Can someone give me the URL for the non Davis logger?  Also, are there any major reasons I should stick to a Davis datalogger?

[hmderek]

I use a Meteostick combined with a Raspberry Pi to write updates to a local database. That might not be what you are thinking of, it's an interesting option. I think Smartbedded offers several solutions: https://www.smartbedded.com/wiki/index.php/Welcome

[ConligWX]

also Meteobridge Nano and Pro:  https://www.meteobridge.com/wiki/index.php/Home

[NK7Z]

Many thanks to all for the answers, now to research which I want...  Thanks again!

07/30/20:
I ordered and received a WLL.  I have it on line here:
https://www.wunderground.com/dashboard/pws/KOREUGEN288
http://www.findu.com/cgi-bin/wx.cgi?call=FW8055

I also have obtained the first JSON data via the LAN...  Getting ready to write a parser to build a web page for my web site...

Many thanks to all again!

[johnd]

There are many options for loggers. Meteobridge loggers are one good solution but one of several. More detailed discussion at:

https://www.weatherstations.co.uk/pc_linkage.htm

[ConligWX]

There are many options for loggers. Meteobridge loggers are one good solution but one of several. More detailed discussion at:

https://www.weatherstations.co.uk/pc_linkage.htm

johnd

in regards to the weatherlink Live.  Does this act like the WeatherlinkIP when software is trying to access it at the same time?  ie Only handles one process at a time. I know CumulusMX and other software have a "disconnect" timer feature so that the WLIP at least, can still talk to weatherlink.com then will talk to the software again, etc or can the WLL handle multiple requests at the same time?

[galfert]

WLL will provide data to multiple applications at the same time. It uses a new local API to do this. There is no issues with Weatherlink.com uploads. No need for timeouts. Some current applications that support this new API method are: Cumulus MX, Meteobridge, Weather-Display, and WeeWX.

[ConligWX]

Thanks for the answer.  Contemplating on purchasing one soon, just needed to find if it had the same type of issue the WLIP had.

[johnd]

As galfert says ↑↑↑ . But to amplify slightly: wind and rain data (ie the fast-changing weather parameters) are broadcast by WLL and any number of devices on the local network can hear these broadcasts.

For all other parameters (temp/hum, pressure, sun etc etc), the computing device must make a specific request to WLL. A WLL unit can handle a limited number of such requests without interfering at all with uploads to wl.com. Davis haven't specified exactly what 'a limited number' might equate to, but a couple of other devices making requests eg no more than once per minute (remember this is for the slower changing parameters) should be fine. And I think that covers most credible circumstances. But what probably isn't OK is to have say a classroom of 20-30 PCs all wanting to poll one WLL unit for data continuously.

[ConligWX]

ok thanks guys!

[ConligWX]

btw what speed is the Ethernet port on the WLL?  data sheet doesnt say. I know the WLIP was only 10T-Base/Half.

[johnd]

btw what speed is the Ethernet port on the WLL?  data sheet doesnt say. I know the WLIP was only 10T-Base/Half.

Sorry, don't know. The vast majority of users have WLL units on WiFi of course, it's rare to find someone who wants to use Ethernet. And data volumes are tiny so presumably no great pressure for a high speed implementation. At a guess it's some flavour of 100Base-T but you'd need to email Davis support for an answer if it's important (and be prepared for a wait - I doubt if front-line support know).

[ConligWX]

I'll find out soon johnd, just ordered! 

[mcrossley]

btw what speed is the Ethernet port on the WLL?  data sheet doesnt say. I know the WLIP was only 10T-Base/Half.

100Base-T (definite) Full (pretty sure)

[ConligWX]

Yep  100FDX 

[NK7Z]

OK...  I think I have a handle on this beast...  I now have it feeding Davis, WCOPS, and NOAA.  I just finished building a json parser to put the output of the WLL on my desktop.  Here is a shot of the lower left corner of my desktop:

 [ You are not allowed to view attachments ]

Many thank to all that helped!!!!

I am pretty sure the yearly rain rate is because this is a new install of the WLL...  It has not seen any rain yet!

Does anyone know how the timestamp is setup on the WLL?  I get an odd number for TS, that is not obvious to me as to how it works.

[galfert]

What does the time stamp look like? It might be Unix Time.

[NK7Z]

I'll bet you are right...  Here is a cut from the JSON data the WLL provides to me, note "ts":

{
  "data": {
    "did": "001D0A712A19",
    "ts": 1596411603,
    "conditions": [
      {
        "lsid": 333561,
        "data_structure_type": 1,
        "txid": 1,
        "temp": 84.6,
        "hum": 36.7,
        "dew_point": 55.2

I just looked it up, it is Unix time, thanks!!!  I run a linux box and did not notice it, go figure!