Hi edr1924,
I don't believe that the serial data format is as well documented as can be downloaded from Peet Bros., but if you are familiar with Arduino coding then you should be able to "reverse engineer" the data.
Good quality Magnetic Reed sensors are extremely reliable, so IMHO not significantly inferior to Hall sensors, even for an anemometer. However, I was very surprised to learn that anybody uses a potentiometer for wind direction (even Fine Offset used reeds in their sub-100 Euro stations). But I guess that Davis must use a very high quality "professional quality" potentiometer, perhaps like used for mixing desks, etc.?
The Peet Bros method is much more elegant and I believe produces a simple "pulse position" output (albeit with a variable frequency). That could be converted to an analogue (0 - 5v dc) voltage using just a "flip-flop" (bistable) followed by a (very) low-pass filter (many seconds time constant). But a microcontroller method would be better, for example to bisect the angles between the rising and falling edges of the pulses, and to achieve the required very long time constant (i.e. sample and hold).
I bought my 6410 much more cheaply (on eBay), but otherwise I would be very tempted by the Peet Bros. anemometer. I note that the (only) UK distributor is selling the complete "low end" station (Ultimeter-100) at the equivalent of about 150 Euros. That includes the same "Professional" anemometer, a console (which also delivers the RS232 serial data for a computer), 12v power supply and external temperature sensor, etc. However, "complete station" is rather an over-statement because the Rain and Internal Temperature sensors are high-priced "options" and it doesn't support Humidity (Out or In) or Barometric Pressure sensors at all.
Cheers, Alan.
I don't believe that the serial data format is as well documented as can be downloaded from Peet Bros., but if you are familiar with Arduino coding then you should be able to "reverse engineer" the data.
(13-04-2019, 08:36)edr1924 Wrote: I'm undicided which wind sensor to use, the Peet Bros unit is very sensitive and only 115 euro's. (Davis 6410 is 175 euro's) But the Peet Bros unit has reed sensors (no hall) and a very clever way to read the wind dir and speed but WeatherDuino need a output of 0-5V so maybe I will make an Arduino conversion board or try the new Davis 6410.
Good quality Magnetic Reed sensors are extremely reliable, so IMHO not significantly inferior to Hall sensors, even for an anemometer. However, I was very surprised to learn that anybody uses a potentiometer for wind direction (even Fine Offset used reeds in their sub-100 Euro stations). But I guess that Davis must use a very high quality "professional quality" potentiometer, perhaps like used for mixing desks, etc.?
The Peet Bros method is much more elegant and I believe produces a simple "pulse position" output (albeit with a variable frequency). That could be converted to an analogue (0 - 5v dc) voltage using just a "flip-flop" (bistable) followed by a (very) low-pass filter (many seconds time constant). But a microcontroller method would be better, for example to bisect the angles between the rising and falling edges of the pulses, and to achieve the required very long time constant (i.e. sample and hold).
I bought my 6410 much more cheaply (on eBay), but otherwise I would be very tempted by the Peet Bros. anemometer. I note that the (only) UK distributor is selling the complete "low end" station (Ultimeter-100) at the equivalent of about 150 Euros. That includes the same "Professional" anemometer, a console (which also delivers the RS232 serial data for a computer), 12v power supply and external temperature sensor, etc. However, "complete station" is rather an over-statement because the Rain and Internal Temperature sensors are high-priced "options" and it doesn't support Humidity (Out or In) or Barometric Pressure sensors at all.
Cheers, Alan.