Embedded System for Controlling Temperature, Relative Humidity, and Lighting for a Test Chamber

Temperature and humidity chambers are often employed for stress testing materials. In the case of cultural heritage materials, it is also crucial to incorporate light condition in these evaluations. Consequently, controlling these parameters is essential to effectively simulate accelerated environmental conditions. This letter outlines the design and implementation of an embedded system that manages temperature, humidity, and light levels. Built on an ARM Cortex-M3 System on Chip, the system integrates various temperature and humidity sensors and actuators, along with a light controller. It also features an embedded user interface and facilitates communication with an external PC. The validity of our proposal is demonstrated through the implementation of a proportional-integer control mechanism for the regulation of temperature and relative humidity.