Lux Meter Integrated with Internet of Things (IoT) and Data Storage (LMX20)

摘要

This project presents a prototype of lux meter integrated with Internet of Things (IoT) and data saving. Some commercial lux meters do not have data storage and cannot connect to the internet. Therefore, this project developed a prototype of a lux meter with additional features such as data logger and IoT. The prototype is using NodeMCU as its controller because it is cheap and easy to use. Besides, the sensor used for this prototype is BH1750 light sensor. It has a wide range sensor, and it could detect up to 65535lx value. Then, the data obtained also can be stored and saved in the Secure Digital (SD) card. These features will allow the user to secure the data and use it in the future. For IoT, there is a built-in WiFI module which is ESP8266 where it connects the prototype to the application in a smartphone which is the Blynk application. In the application, it will show the reading of the lux from the prototype, and there is a graph analysis of the lux measurement. Apart from measuring the lux, this prototype is also suitable for monitoring applications as the measurement can be monitored from a smartphone. However, the experimental test is done at home obeying Movement Control Oder (MCO) due to Covid-19 in this area.