My project for the Fall of 2025 was the MTEC-02A soil moisture sensor from Seeed Studios. The sensor is made to be inserted or buried in the soil and returns 3 metrics: temperature, volumetric water content (VWC) and electrical conductivity (EC). A great way to track periods of drought in the Summer that occur more…
Tag: wemos d1 mini
Reading RG-15 Rain Data on a Wemos D1 Mini Using SoftwareSerial
In this post I explain how I use the Hydreon RG-15 in tipping bucket mode. There I use the J1 connector and listen for virtual “tips”, analog signals that indicate a certain amount of rain has been detected. The RG-15 also has a J2 connector which allows for digital communication via a serial connection between…
Reading the Hydreon RG-15 using a Wemos D1 Mini
During previous summers I have always been busy with temperature sensors and radiation shields. This year, I have shifted my focus to precipitation. The main reason why I find this interesting is that our warm seasons have seen quite a few dry spells over the past few years. This causes all sorts of issues, but…
Reading fan speed from the Barani MeteoShield Pro fan-aspirated model (FARS)
In this post, I explained how I use a Wemos D1 Mini microcontroller and a MOSFET module to control the fan speed of a wired fan-aspirated MeteoShield Pro from Barani Design. I am also testing a model with a fan powered by solar panels. Both come with two additional wires connected to a reed switch…
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. Platinum resistance sensors are supposed to be very accurate. They are used in many different situations, from laboratory settings to industry. And…
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…