Design and Build a Soil Nutrient Measurement Tool for Citrus Plants Using NPK Soil Sensors Based on the Internet of Things

A suitable planting medium is a of good quality soil that can support plant growth quickly. Fertile the primary need for plants. The dramatically affects growth. types needed vary, namely sandy soil, red alluvial and humus soil. Using an NPK sensor functions to detect nutrients in work if tip plugged into they want detect, results detected by will be sent form analog signal data nodemcu, which processed displayed on screen. Thingspeak. This tool controlled nodemcu with output thingspeak. function measure citrus seedlings, read Npk Thingspeak web, making it easier farmers seed seeds. thingspeak, monitor From tests carried out, found nutrient content wet higher than dry soil; from accuracy rate 90%.