As I pointed out in my previous post on the AS3935 lightning detector, the AS3935MI library available through the Arduino IDE works quite alright. However, every time I boot the Wemos D1 Mini with it, I get a warning that the calibration of the resonance frequency failed. As per the datasheet, the frequency needs to […]
AS3935 lightning detector with Wemos D1 Mini
Lightning detection has been on my wish list for my weather station for some time. Detectors often come as stand alone units with a display or indicator LEDs. This makes sense when the use case involves taking it along as a hand held device or installing it on your boat. However, in order to process […]
April 2021 was zeer koud
Deze conclusie was halverwege april al in de maak. Overal in Nederland viel de temperatuur ver onder het langjarig gemiddelde uit. Dat is ook terug te zien in de statistieken van meteodrenthe.nl voor deze maand. Op weerstation Lieving bleef de gemiddelde temperatuur uiteindelijk net onder de 6 graden steken met 5,99°C. Dat is bijna 4 […]
Weather patterns: April 5th 2021
Early morning on Monday April 5th 2021 saw an interesting weather pattern shift that was very noticeable in almost all reading types; temperature, pressure, wind direction and air quality. Weather reports had already predicted that in the night towards Monday, polar air would enter the Netherlands, temperatures at altitude would drop to -40 and we’d […]
Monitoring radiation shield performance
Spring is here. Today was the first ‘warm’ day (> 20°C) of the year. Conditions where solar radiation errors will start cropping up in the temperature data. Accuracy of temperature readings is a surprisingly complex subject. But any attempt to get accurate readings starts with shielding the sensor from direct or indirect sunlight and ensuring […]
WeatherLink Live, local API and barometer
A few weeks ago, I made the switch from reading my Davis sensors with the Meteostick to the Davis made WeatherLink Live. Though I still like the concept of the Meteostick, the reception is fairly poor and sometimes it would stop receiving data and require a reboot. One thing you don’t have with the WeatherLink, […]
Upgrade to the SHT35
Around New Year’s I took the time to finally bring a new Sensirion SHT35 temp/hygro sensor online. It’s an upgrade compared to the SHT31 sensor chip Davis uses for their Vantage Pro 2. On top of it being more precise (+/- 0,1 C in stead of 0,3 for the SHT31) it also registers an extra […]
Proof of concept custom console display
The Davis Vantage Pro 2 display is quite a bulky thing. I’ve added non-Davis sensors to my setup, and included a Davis AirLink in October too, which is WiFi based and not visible on the console. Plus, my console has been partially broken for a while. 🙂 Reason enough to look at an interesting alternative: […]
Switch to the BMP280 pressure sensor
In a previous post I wrote about tests of the BMP180 pressure sensor. These were not all I hoped for, so I ordered a BMP280 sensor, which is supposedly an upgrade of the BMP180. Perhaps it would give me better results. As it turns out, it appears it does! I only ordered one sensor at […]
The BMP180 barometer
I have long been unhappy with the performance of the Meteostick internal barometer. Although the values it emits are usually totally acceptable, it tends to spike inexplicably multiple times a day. So, this week I finally came around to installing a new sensor, the Bosch BMP180. Its performance compared to the Meteostick can already be […]