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First PCB Prototype

We’ve been testing several wireless prototypes of building sensor nodes and will keep this blog updated on the progress as we go along. In the meantime, we thought it would be cool to make a PCB version of our T/RH data logger. The board was designed in CadSoft Eagle and sent over to OSH Park for fabrication. Here’s is one of the OSBSS data logger prototypes that we soldered (using a hacked $12 toaster oven from Target, obviously):


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Configure DS3234 RTC in OSBSS dataloggers

The DS3234 RTC breakout from SparkFun does not include a backup battery (CR1225). After inserting the battery, the RTC’s oscillator initializes and starts keeping time from 1/1/2000 00:00:00. The RTC’s time needs to be manually setup once. If you’ve already assembled an OSBSS datalogger, upload the following code to configure the current time in the RTC:

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Temperature & Relative Humidity Datalogger using DHT22 and Arduino Uno


The following tutorial will guide you through the process of building your own data logger for reading temperature and humidity and storing it to the SD card at any given interval. We will use one of the most common Arduino boards for this project: the Arduino Uno. This tutorial is aimed for beginners who are new to the Arduino platform.

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Motivation for OSBSS


Recent advances in culture-independent molecular techniques and metagenomic computational tools for analyzing microbial diversity, coupled with the recognition that the majority of people in the developed world spend most of their lives indoors, has led to a rapid increase in the number of studies exploring microbial diversity within the built environment. Recent studies have characterized microbial diversity in offices and other commercial buildings, classrooms, healthcare facilities, homes, and transportation environments, which all represent indoor environments where people spend much of their time. In general, these studies have shown that many bacterial communities in occupied environments appear primarily dominated by human skin, gut, nasal, and/or oral source, with some variability attributed to building ventilation strategies and occupancy characteristics. Conversely, fungal communities appear primarily dominated by local outdoor environments.

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OSBSS is born!


We are very excited to officially launch of the Open Source Building Science Sensors (OSBSS) project! The goal of OSBSS is to develop and document the design and fabrication of a network of inexpensive, standardized, and synchronized measurement devices for recording long-term indoor environmental and building operational parameters that are likely to influence microbial diversity and abundance in indoor environments. Documentation of the development, calibration, and performance of the sensor network will utilize open source hardware so anyone in the world can build their own sensors and sensor networks.