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Even if you dance around the encryption problem, data is only sent to myAcurite in 5-minute intervals, so that may not be terribly useful.

Sniffing the wunderground stream makes more sense as it is not encrypted and sent in real-time.  The disadvantage is that you'll only be able to pick up data from one sensor.

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Davis Instruments Weather Stations / Re: Repeated signal dropouts
« Last post by openvista on Today at 10:10:27 PM »
dalecoy,

So, on one hand, we have the older and slower VP2 that struggles keeping up in cold conditions, particularly making frequency corrections in real time across multiple IDs. On the other we have the Vue -- a more capable unit with, perhaps, better firmware (something I posited awhile back in the CC1021 thread).

That still doesn't explain why some VP2 consoles experience this issue and others do not in identical weather conditions. Care to speculate?
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Davis Instruments Weather Stations / Re: Repeated signal dropouts
« Last post by rdsman on Today at 10:00:35 PM »
Here is some food for thought:

According to the FCC fillings for both consoles (internal Pictures);

Both consoles use the same processor - ATMEGA128L.  The VP2 processor uses an external crystal (shown in the pictures), the Vue apparently uses the internal RC oscillator of the processor (no external crystal shown in the pictures).  Along with keeping up with transmitter frequency drift, both would have to somehow timestamp the packets in order to implement a PLL or PID algorithm to keep up with timing errors.  The VP2 would have to determine the frequency error, calculate a new receive frequency (for each transmitter) and save it into an array.  For the Vue, it can read the frequency error direct and save it into an array (for each transmitter) and simply write the accumulated value back to one register to be applied next time around.  No matter how you look at it, the Vue would be faster at doing this that the VP2 in the case of frequency error.  They would require the same amount of time for timestamping packets assuming they both run at the same processor speed.

I'll go back to sleep now........
     
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 :arrow: For Tuesday - January 23, 2018  :!:

   :grin:
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Weather Web Site Help / Re: wxtrends.php
« Last post by yamiacaveman on Today at 09:54:10 PM »
Thanks for clearing that up!!
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Davis Instruments Weather Stations / Re: Repeated signal dropouts
« Last post by dalecoy on Today at 09:52:27 PM »
Surely the console only listens to one frequency at a time (before it hops to the next one I mean)?

That's correct - but it can very rapidly change the frequency it's listening to.

Maybe the transmitters don't talk to each other, but surely they listen to each other (fsvo listen at least). Otherwise how does a new transmitter in a set-up that already has eg an ISS know how to time its packet transmissions and to sequence its frequencies?

Still wondering about "fsvo", but...

Note that the transmitter doesn't have to know anything about anything, except for the setting of the dip switches.

Also, I'm told that European systems (in the 868 MHz band) use only four frequencies.  That wouldn't require much change in the firmware, and would speed things up a bit - but be more susceptible to outside interference.   
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The Big Brown UPS truck came by yesterday bringing 2 boxes. Spent last night and today setting everything up. Due to accessibility issues and the cable being a bit too short plus the issues with the station mast itself I chose to rig it up at the other end of the apex of the roof away from the main weather station.

I tested everything using a Victor electic rat zapper and made some artificial lightning. Sure enough they registered on the detector. Made some financial adjustments and orientation using a compass. Everything works perfectly! There's a chance of storms this weekend so hopefully I'll really get to see some action.
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Weather Station Pictures / Boltek installation pictures.
« Last post by Skywatch on Today at 09:27:02 PM »
Yesterday evening the big brown UPS truck came to my door with 2 boxes from Boltek. Spent last night and today setting it up.

https://flic.kr/p/23FYxzQ
https://flic.kr/p/E5HqCK
https://flic.kr/p/FASVWQ
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I reviewed that thread but it dealt with incorrect moon phase. I couldn't locate anything regarding the "sunposa.php" graph.
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Davis Instruments Weather Stations / Re: Birds on the anemometer
« Last post by dupreezd on Today at 08:58:27 PM »
Quote
upside down birds.
:lol:  =D>
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