Development Monitoring and PID Control of an Environmental Testing Chamber Using Node Red

The market potential for testing machines for environmental conditions in Indonesia is very large, from the food industry, the cosmetic industry, the pharmaceutical industry, etc. These industries in their product development often experience problems in testing environmental condition test machines, because almost 100% are imported products and there are no locally made environmental conditions testing machines. This condition resulted in the author and the team taking the initiative to try to develop a test machine control system for environmental conditions that controls temperature and monitoring humidity, air pressure and CO gas in an environment as the main parameters in food testing. The test machine is designed using Raspberry pi zero w as a control device, and Node Red as an application for display control and monitoring that can be accessed remotely. The research conducted resulted in an environmental test machine that controls temperature using the PID method with an error rate of 0.375% with a value of Kp = 2.73, Ki = 0.1 and Kd = 1. with the concept of IoT control and monitoring chamber can be done remotely using the Node Red Software.