Cost-effective wireless microcontroller for internet connectivity of open-source chemical devices
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Mercer, Conan, & Leech, Dónal. (2018). Cost-Effective Wireless Microcontroller for Internet Connectivity of Open-Source Chemical Devices. Journal of Chemical Education, 95(7), 1221-1225. doi: 10.1021/acs.jchemed.8b00200
This paper presents a system for remote monitoring of turbidity data that can detect light intensity and temperature using a microcontroller and the Internet of Things. The system comprises a light dependent resistor and infrared temperature sensor interfaced with an ESP-12E microcontroller, a programmable data acquisition platform; together these enable remote real-time monitoring of turbidity data applicable to chemical education. This system will allow educators and students to monitor chemical experiments in real-time through a web browser. Changes in turbidity and signal processing associated with a light dependent resistor are stored locally on the microcontroller and transmitted wirelessly via a WiFi-based connection to a cloud-based server. The light intensity signals are displayed on the system through an organic light-emitting diode and subsequently uploaded to a cloud-based server. A web-based signal processing MATLAB program plots the uploaded signals available as real-time streams to authorized subscribers over standard browsers.