IoT for Smart Farm: A Case Study of the Fertilizer Mixer Prototype

This research aims to 1) study, design and develop fertilizer mixer using Internet of Things. 2) develop application control the fertilizer mixer using mobile application. The results shown that the fertilizer mixer using IoT technology and conFig.d with application via smartphone. The research is divided into 2 parts: 1) hardware 2) software. The hardware using ESP32S platform for control devices and applications, Users can mix fertilizers according to the formula they want with the program that runs on their smartphones, calculating formula N-P-K to get the mixed fertilizer by weight of the fertilizer. The user can set schedule for the fertilizer mixer in 2 ways: 1) the fertilizer mixer immediately 2) set the schedule date, time for the fertilizer mixer. User can also choose from two forms of blending: 1) select according to the recommended formula or saved formula (by selecting from plant name and plant age) 2) by setting N-P-K values such as 16-20-0 or 15-1515, etc. The results of automatic fertilizer mixer was found that the automatic fertilizer mixer was able to perform the work according to the specified capacity efficiently and the error of the weight of the fertilizers from the automatic fertilizer mixer is 7% of the total weight of the required fertilizer.