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Author: meteodrenthe

Project Apogee part 3: controlling the TS-100

Posted on August 11, 2021September 21, 2023 by meteodrenthe

In my previous post I addressed the power supply needed to run the Apogee Instruments TS-100 fan aspirated shield in my setup. The next step is building a controller for the fan that allows me to vary the fan speed and read the actual rpm being achieved. The idea is that the controller can query…

Project Apogee part 2: power supply

Posted on August 8, 2021August 26, 2021 by meteodrenthe

Project Apogee requires me to rethink the power supply of my weather station. When I start writing this, the Meteodrenthe weather station runs on solar power only. The Davis components have their own panel inside the transmitters. Other custom elements use 2 watt 6 volt panels by Voltaic Systems. This has been an ideal solution…

Project Apogee part 1: fan aspiration

Posted on July 20, 2021December 27, 2021 by meteodrenthe

My big project for the summer of 2021 is adding a fan aspirated radiation shield to my setup. My primary shield – the Barani MeteoShield Pro – is a superb product, but a passive shield it remains. It suffers from overheating in windless conditions. Those conditions do not occur too often at my location, but…

Mei 2021 was koud en nat

Posted on June 1, 2021June 1, 2021 by meteodrenthe

De vijfde maand van 2021 is ook de vijfde koudere maand op rij. Na een zeer koude april is ook mei met een gemiddelde van 10,62 graden bijna 3 graden kouder dan gemiddeld (normaal ~13,4). Het referentiepunt voor weerstation Lieving, het KNMI in Hoogeveen, eindigt met een gemiddelde temperatuur van 10,76. Mei was bovendien erg…

Tuning the AS3935 lightning detector

Posted on May 19, 2021August 13, 2021 by meteodrenthe

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

Posted on May 14, 2021May 19, 2021 by meteodrenthe

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

Posted on May 3, 2021May 3, 2021 by meteodrenthe

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

Posted on April 13, 2021April 13, 2021 by meteodrenthe

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

Posted on March 30, 2021April 6, 2021 by meteodrenthe

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

Posted on February 17, 2021September 7, 2022 by meteodrenthe

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,…

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My personal weather station is located in a small township in the North of the Netherlands.

This blog records updates to my setup, development of components, weather reports and anything related.

Real time data generated by the weather station can be found on meteodrenthe.nl.

Some products and technologies in use:

Davis Vantage Pro 2

Davis AirLink

Davis WeatherLink Live

Barani MeteoShield Pro

Apogee Instruments TS-100

Davis 7714 radiation shield

MetSpec RAD14 radiation shield

Vaisala DRT504

Siap+Micros SMarT CELLino

Wemos D1 Mini microcontrollers

Bosch BMP280/BMP3xx pressure sensors

Sensirion SHT35 temp/hygro sensor

PT100 temperature sensor

10K NTC thermistors

Adafruit breakout boards

ADS1115 analog-to-digital converter

Light intensity sensors

Voltaic Systems solar panels

Foscam FI9900P weather cam

Raspberry Pi Zero W

Custom printed circuit boards

C++ (Arduino code)

Java (server backend)

Angular Framework

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