In a previous post I explained how I used the MAX31865 with a Wemos D1 Mini to read a PT100 sensor. This worked, but initial readings were erratic. Readings were also off by about 1 degree C. Almost two weeks later, I have tested 3 different PT100 sensors. I now have an Arduino sketch running […]
Author: meteodrenthe
Reading a PT100 sensor with a Wemos D1 Mini
In my never ending quest for better temperature readings – or other ways of doing so, at least – I’ve begun trying other sensors than the SHT35. One of them is the PT100. It’s supposed to be very accurate. It it used in many different situations, from laboratory settings to industry. It’s also used in […]
Apogee TS-100 first impressions
I was losing the last light and had to get a flash light while connecting the last wires Tuesday evening (August 17th), but I have the TS-100 up and running. Without battery backup for now. I will fix that later. Adding this new shield to my setup has triggered a whole series of new tests […]
Project Apogee part 3: controlling the TS-100
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
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
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
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
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 […]