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Davis Instruments Weather Stations / Re: Anemometer & Vane Tester
« Last post by wxtech on Today at 03:06:01 PM »
I need some help beta testing part 3 of this project.
Part 1 is called simple because you can purchase your own parts and use the instructions: http://www.lexingtonwx.com/anemometer/simple.pdf

Part 2 is a method to test your anemometer using a multimeter and these instructions: 
http://www.lexingtonwx.com/anemometer/resistance.pdf

Part 3 is a construction using my circuit board.  I have built and test previous versions which work.  I wish that someone will build and evaluate the instructions and the circuit operation before many people try it. 
The part 3 instructions:  http://www.lexingtonwx.com/anemometer/tester.pdf  for beta testing only.  Wait for an evaluation before you invest money and time.  If the design is approved, all design information will be turned over to the forum. 

Will this forum group select one to beta test this project?  I will mail (free to a US address) the circuit board to the one that this forum selects.  IC, LEDS, resistors, connectors, battery, cable probably cost $20.

Happy experimenting,
Al
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So if this only works with Cumulus or weatherlink one at a time just like the Davis logger and I'm using Cumulus already and not changing, I'm trying to see advantage of this over WL data logger which BTW is less money.
 
I'm not turning computer off because Cumulus and website uploads its needed, while wifi is nice it isn't something I really need so what advantage would I have using this product?

This product is just not for you in that case. You like to have computer always on and Cumulus software to upload data.
WiFilogger needs only router. When it has WiFi connection to the internet it can upload data to WL,WU, PWS .... by itself.
It's like original IP logger, but it's WiFi and you can setup what it will do for you.
Original one can work with WeatherLink/Cumulus and upload to WeatherLink.com
WiFiLogger has some more options to export data, you can view data on its web interface also.
If somebody has original IP logger I don't think he will be interested in my product.
If somebody use set computer + weatherlink/cumulus in that case WiFi is useless.
But if somebody has VP2/Vue without any data logger, that can be quit good option for him. WiFi + no computer

Please take it into consideration that WiFiLogger will have more functions in the future.
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Curiosity question: What's the RF output power and thus 'nominal' operating range?

Tx Power
802.11 b: +20 dBm
802.11 g: +17 dBm
802.11 n: +14 dBm
Rx Sensitivity
802.11 b: -91 dbm (11 Mbps)
802.11 g: -75 dbm (54 Mbps)
802.11 n: -72 dbm (MCS7)

Using Mode N, operation range is not much. If you have router on second floor, maybe you will need to switch to Mode G or even B.
B & G has more power and better sensitivity.
This WiFi chip is popular now. People test it very well. It has very good operating range, but using external antena.
WiFiLogger has builtin antena and it's under cover.
Distance is a problem only with special use. At normal house, that should not be a problem.

For distance I have idea to add GSM module as an external module in a future.
Question was asked to establish some idea of "operating range"...10' or 100', etc. Combination of FCC limitations and battery power lean toward "short" range only.
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So if this only works with Cumulus or weatherlink one at a time just like the Davis logger and I'm using Cumulus already and not changing, I'm trying to see advantage of this over WL data logger which BTW is less money.
 
I'm not turning computer off because Cumulus and website uploads its needed, while wifi is nice it isn't something I really need so what advantage would I have using this product?
5
RE: ET from a solar sensor and irrigation. There are 2 ways to use it.

The ET output from a Davis console is summed over 24 hours from midnight.



Sum the 7 day daily max ETs and get a good estimate of the amount of water you should irrigate next week in inches.

I developed that and called it the Irrigation Index.

Then I found that the California DWR had developed the Watering Index. To use it you need the above summed daily ETs, as well as the highest average weekly ET for your location, and an irrigation timer with a Percent adjustment.

Set your controller to water the amount of the highest average weekly ET.

Then, the current controller percentage setting = (Last 7 Days ET/highest average weekly ET) x 100. Note that for a hot, dry, windy week, the setting can be > 100%.

Also, I modified that DWR index to include last 7 days rain for SLOweather.com.  ((Last 7 Days ET-Last 7 days rain)/highest average weekly ET) x 100

Note that this modification can go negative. I wrote a PHP script to do those calcs for display on SLOweather.com. I think my Irrigation Index also includes the last 7 days rain as well.

Here's a grab of today's Indexes:



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no,problem best to do,what suits your liking and meteobridge and weatherflow perfect combination as the meteobridge will power the weatherflow hub and delivers data as it arrives .

anyway easy to use shown below

That will probably create a slight issue for me, since I have the Meteostick plugged into the meteobridge usb port. Perhaps a USB hub would work. I guess the Weather Flow data is broadcast via UDP.
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no,problem best to do,what suits your liking and meteobridge and weatherflow perfect combination as the meteobridge will power the weatherflow hub and delivers data as it arrives .

anyway easy to use shown below

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Curiosity question: What's the RF output power and thus 'nominal' operating range?

Tx Power
802.11 b: +20 dBm
802.11 g: +17 dBm
802.11 n: +14 dBm
Rx Sensitivity
802.11 b: -91 dbm (11 Mbps)
802.11 g: -75 dbm (54 Mbps)
802.11 n: -72 dbm (MCS7)

Using Mode N, operation range is not much. If you have router on second floor, maybe you will need to switch to Mode G or even B.
B & G has more power and better sensitivity.
This WiFi chip is popular now. People test it very well. It has very good operating range, but using external antena.
WiFiLogger has builtin antena and it's under cover.
Distance is a problem only with special use. At normal house, that should not be a problem.

For distance I have idea to add GSM module as an external module in a future.
9
no problem most changes are reference to air quality.

side note some really usefull control features were released today for the weatherflow hardware control app by weatherflow hopefully the test period for the app will over by the time you get yours they are really working hard and some of the newer features added today is all based on ideas forwarded by field testers over the last few months . all i can say the third unit ive installed is working flawlessly .



have a nice upcoming weekend...brian



I have been using AQI data from a Purple air unit that is a good distance from me, so its not that accurate. Given the choice I would show the Moonphase instead.

I am looking forward to receiving the Weather Flow units. I hope to run them side by side with my Davis - posting the data via the upper panels of your template.

Have a great weekend!

Chuck
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Curiosity question: What's the RF output power and thus 'nominal' operating range?
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