Materials for the production of MLogger, an indoor thermal environment measurement device, are available.
MLogger was developed for the purpose of easily measuring the indoor thermal environment.
To evaluate the indoor thermal environment, it is necessary to measure at least dry bulb temperature, relative humidity, radiation temperature, and wind speed.
A comprehensive instrument that measures these physical quantities typically costs over $1000. They are also large in size and difficult to install many in the field because they are powered from an electrical outlet.
The MLogger costs less than $50 to produce, fits in the palm of your hand, and runs on AA batteries.
For more information about it, check the paper and website.
Here, four materials for producing MLogger are published in a directory.
This directory contains materials for making the board.
There is a project file of the board by Autodesk's Eagle, a list of components to be mounted on the board (BOM), a data sheet of the components, which could be outsourced using PCBA services.
This directory contains a program to be written to the microchip to make the board work.
Since this instrument uses Atmel's AVR128DB32, it is being developed in Atmel Studio.
The measured data is sent to a PC via Zigbee communication using XBee.
A solution file which contains a software project file for receiving this data on a PC is available.
The software is developed with Microsoft's Visual Studio, and since .NET 8 is the target, it has also been confirmed to work on Linux.
XBee can also communicate via Bluetooth from 3.0.
Therefore, data can also be received by ordinary smartphones.
The solution file also contains MAUI project file to receive measurements on iPhone and Android.
Copyright Eisuke Togashi 2023.
This source describes Open Hardware and is licensed under the CERN-OHL-P v2
You may redistribute and modify this documentation and make products using it under the terms of the CERN-OHL-P v2 (https:/cern.ch/cern-ohl).
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Please see the CERN-OHL-P v2 for applicable conditions