Remote monitoring system for hydroponic planting media

Hydroponics is a method of planting or cultivating plants without using soil but uses water, nutrients, and oxygen. It has advantages such as higher quantity and quality of production, cleaner, more efficient use of fertilizers and water, and also easier in pest and disease control. Hydroponics system requires precision, patience, and regular monitoring which is quite a challenge to conduct. Here we propose a monitoring system designed with PH sensor, Electro Conductivity Sensor, water temperature sensor, air temperature, Light Sensor, GSM / GPRS, Open Garden Shield, Open Garden Hydroponic, and Arduino Uno as main board or microcontroller. We found the results of number of leaves and plant height during the test for each plant as follows: on the lettuce it has 6 leaves and 3.6 cm tall, for red spinach plants it has 6 leaves and 3.8 cm high, while in mustard plant pak choy, the number of leaves obtained is about 6 strands with height 4.2 cm. Two weeks of testing on lettuce, red spinach, and mustard pak choy indicated that the sensor and the system were operating well.