Hi,
(28-08-2017, 23:28)Werk_AG Wrote: ... the Zdeneck assembling can be one of the best possible solutions. Everything installed inside a structure similar to a radiation shield. This approach also have the advantage of providing good conditions for the Temperature / Humidity sensor.
- ... the readings from the sensor are also transmitted to the RX unit, acting like a Davis extra sensor. By default its mapped to extra sensor 6...
You didn't mention the height above ground to mount the assembly, but (for obvious reasons) I believe it normally would be at about "head height" (~1.5 metres), similar to the primary weather T/H sensors. Of course sometimes a different height may be needed to keep away from "human influences", or perhaps that's what some might
want to measure (vehicle exhaust, etc.).
Going a little Off Topic: For my (urban) location, one of the advantages of the Weatherduino concept is that the Solar sensors can be mounted "up with the wind sensors" on a mast and / or "on the roof", sharing a Transmitter board. So the only "missing" low-level meteorological measurement from the AQM is Rainfall (if there are no no leaf / soil wetness requirements). Therefore,
in the longer term, might it be possible to add a "Rain" input capability to the AQM, so that the present (low level) "Transmitter" board could be omitted (or moved up to "Wind/Solar" duties)?
Of course there are complications, for example in defining which are the "primary" and "extra" sensors. Also, the Nano might be "sleeping" to save power, but the Rain signal is only a simple and infrequent pulse and there do appear to be spare Nano interrupt inputs. The AQM sensor(s) might add some local heating to the enclosure, but then there is a "free" fan to give some Aspiration.
Personally, I would like to support an "extra" Rain sensor, although I don't know how (or if) this might be "managed" with the Davis protocols. A few years ago I purchased a Hydreon RG11 rain sensor, when it was being discussed on the Sandaysoft forum
here and
here. Generally, its optical method is not as accurate as a tipping bucket in good conditions, but it is more sensitive, particularly faster in detecting the onset of rain. It's also ideal for "difficult" and remote sites, being immune to falling leaves (blocking the funnel) and the notorious spiders of tipping bucket sensors. Unlike most tipping buckets, it does need a small power supply (preferably 9 volts, but 5 volts can be used) which fits well with a the Weatherduino concept.
Thanks, Alan.