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The goal of this research is to design a hydroponic automation system for germination until generative growth based on ESP32 microcontroller, and BLYNK called LOTUS. ESP32 acts as main controller for all sensors and actuators. LOTUS able to control temperature, humidity, irrigation, and automatic lighting. LOTUS uses automatic irrigation with ebb-and-flow method. LOTUS included with LED Drivers that able to regulate the amount of light intensity on LED and provide more power efficient usage level. System successfully manages to reduce temperature, humidity, automatic lighting, and irrigation on time. Results from this research show that reading accuracy of the sensors temperature and humidity are, 99,11% for temperature, 97,275% for humidity, power usage for whole system is 49,6 watt, and adjustable irrigation system.

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this research goal is to analyze Real Time Operating System (RTOS) performance on Single Board Computer for wheeled mobile robot. RTOS have better system response than General Purpose Operating System (GPOS), this system response is important for mobile robot, for example mobile robot should stop as soon as possible when the sensor detect the wall. RTOS system analysis on SBC covers several points such as, distance measurement precision resulted by the sensor, the value of latency resulted, and data renewal process due to system interaction on the environment surrounding by ultrasonic sensor. Achieved results show RTOS with Qt-based program and using multithread is well implemented on the SBC, proven by the robot's ability to respond less than 1 second. This result can be accounted as soft real time system. Cyclictest results for proving RTOS and GPOS (General Purpose Operating System) performance shows average latency difference between both systems are up to 300us where RTOS are only 9 us.