Prototype of Plant Advisor Based on Soil Condition Using Internet of Things

In measuring the level of soil fertility, it can be done by measuring several parameters. The parameters used as characteristics in measuring soil fertility are pH, temperature, and moisture. Some measuring instruments to determine these parameters already have accurate values. However, these measuring instruments still do not have a data logger system to store the measurement results. So, a design of pH, temperature, and humidity parameter measurement system with data logger was made. This system is portable by using E201C sensor as a pH measurement tool and DS18B20 sensor as a temperature measurement tool. Also, capacitive soil moisture sensor is used to measure humidity. In addition, in testing each sensor component, the average error value on each sensor is no more than 5% with an accuracy of more than 95%. Then, the calculation of the static characteristic value of each sensor component also has accurate results. This test is carried out with several steps adjusted to the media used, namely soil. In the data logger test, the three sensors have taken readings well and the data can be stored on an SD card. In addition, monitoring measurements can be seen directly on the LCD screen as well as on the device with Blynk. The display that has been given shows the value of pH, temperature, and humidity measurements that have stabilized and given the results of plant recommendations for planting according to soil conditions. In testing the system in the field, the measurement values of the three parameters showed stability at any time for three days. The crop recommendations given were corn, melon, watermelon, and cantaloupe. The results of these recommendations have been confirmed by the partners that these plants have been and are currently planted on the land.