Fluid catalytic cracking (FCC) is a conversion process used in petroleum refineries to convert high-fuel hydrocarbon fractions into other low FCC hydrocarbon fractions. Our research team is researching the FCC using palm oil so that it can become fuel. Regenerators are controlled and monitored by using the Internet of Things technology. The thermocouple sensor in the regenerator and stepper motor 28BY J-48 as an actuator on the ejector valve is controlled by Arduino Mega 2560 and ESP8266 for data reading and processing. The results of this study show that the design of IoT on the FCC regenerator uses Blynk applications have been running properly. The sensor and data actuator can be read by ESP8266 which is then sent to the Blynk server via the cellular network. This shows the ability of a data logger can used in the range’s internet wifi smartphone.