SISTEM KONTROL NUTRISI FLOATING HYDROPONIC SYSTEM KANGKUNG (Ipomea reptans) MENGGUNAKAN INTERNET OF THINGS BERBASIS TELEGRAM
2020
Anri Kurniawan | Hanis Adila Lestari
Nutrient water in the reservoir of floating hydroponic system serves to meet the nutritional needs of hydroponic plants. Continuous circulation for 24 hours causes the water level to decrease due to the evaporation process in plants, resulting in reduced reservoir water every day. The research was conducted by designing a monitoring tool for water level and nutrient of water spinach (Ipomea reptans) on floating hydroponics through the telegram application. Ultrasonic Sensor HC-SR04 as water level reader and sensor TDS DFrobot as a nutrient reader and 2 channel relay as an automatic on-off pump for water and nutrients. The telegram API bot through the botfather is synchronized with nodeMCU-ESP32 so that it can be controlled via the internet of things (IoT) system. Telegram can receive and request information on water levels, TDS, pump status, start and stop water pumps, and nutrients. The water pump is "on" at a height of less than 15 cm and the pump is "off" at a height of above 20 cm, while for the nutrient pump it is "on" at a TDS value of less than 500ppm and "off" at a TDS value above 1000ppm. In ultrasonic sensor testing, an error of 0% was obtained, while in TDS sensor testing, an error of 0-04% and 0-05% was obtained. The hydroponic raft of floating water spinach at the age of 30 HST reached an average plant height of 52.63 cm and a total weight of 31.25 grams.
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