Timeline for Ways to make a "How hard is it raining?" detector for personal use?
Current License: CC BY-SA 4.0
11 events
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| Jul 19, 2021 at 21:42 | comment | added | JRE | @uhoh: I've added RSSI to the data collection for the Bluetooth sensors and the control node WiFi. I'll see what kind of rain indications I can get from that - though it may take a while. We've got sunny weather predicted for the next few days. | |
| Jul 19, 2021 at 9:16 | comment | added | JRE | Could be. Maybe there's a whole new area of research here. Investigation of short range effects rain fall and relative humidity on low power microwave signals | |
| Jul 19, 2021 at 9:14 | comment | added | uhoh | Rain fade will be what a long-distance link between two directional antennas experience, I wonder if multipathtype effects are what's going on in your case; diffuse reflection from rain like weather radar sees. A quick way to look into that would be to record the WiFi signal strengths along with everything else. I think it just reports the slowly-averaged received power level in the carrier band and may not respond to multipathing much. | |
| Jul 19, 2021 at 9:08 | comment | added | JRE | 5GHz (based simply on the higher frequency) ought to be more sensitive to rain, though I can't find anything that specifically addresses it. Rain fade seems to be the proper term for it, though the Wikipedia page mostly deals with directional microwave links. | |
| Jul 19, 2021 at 9:00 | comment | added | uhoh | Bluetooth and "classic" WiFi are (usually) around 2.4 GHz, I wonder if 5 GHz WiFi is more, or less sensitive. | |
| Jul 19, 2021 at 8:51 | comment | added | JRE | I happened to have a lot of "ambient RF" going on with my little Bluetooth sensors. The Wifi thing occurred to me while describing the current set up. It reminded me that the WiFi from the control nodes occassionally doesn't connect to the base station in the house - mostly on rainy days. That reminded me of the neighbors' WiFi as seen when connecting my phone at home and... I get carried away sometimes. Anyway, if you go RF based then the WiFi system would be the cheapest - provided you've got neighbors close enough to "see" their base stations. | |
| Jul 19, 2021 at 8:47 | history | edited | JRE | CC BY-SA 4.0 |
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| Jul 19, 2021 at 8:46 | comment | added | uhoh | I'd mentioned the laser pointer in the question as a suggestion for an optical "raindrops still in the air" detection scheme, but an RF-based scheme is really interesting, and exploiting ambient RF for it is an excellent idea! | |
| Jul 19, 2021 at 8:43 | history | edited | JRE | CC BY-SA 4.0 |
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| Jul 19, 2021 at 8:41 | review | First posts | |||
| Jul 19, 2021 at 8:55 | |||||
| Jul 19, 2021 at 8:38 | history | answered | JRE | CC BY-SA 4.0 |