Smart Lawn NPK Monitor Kit: Arduino Uno Reads 3 Soil Probes & Recommends Fertiliser on OLED

Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.

Bring data-driven care to your lawn with a device that senses what your soil really needs. Three moisture probes placed at different depths measure conductivity, which the Arduino correlates with NPK levels. An OLED display then shows exactly which fertiliser to add and how much, turning guesswork into a simple science project you can build in an afternoon.

What You'll Build

You'll assemble a portable lawn advisor that reads soil moisture and temperature, runs a pre-calibrated algorithm to approximate nitrogen, phosphorus, and potassium levels, and prints a clear recommendation on the OLED—like “Apply 3g urea per sq. foot.” It’s a self-contained unit that makes precision lawn care accessible without expensive lab tests.

What You'll Learn

• Interfacing multiple analog soil moisture sensors and a digital temperature probe with Arduino Uno
• Using conductivity measurements and temperature compensation to estimate NPK nutrient content
• Driving a 0.96-inch OLED display for real-time data output and decision logic
• Calibrating sensors and building a practical environmental monitoring system for agriculture or home gardens

Kit Contents

Why Buy This Kit Instead of Sourcing Parts Separately

Who This Kit Is For

Designed for CBSE Class 11–12 students taking up agriculture-tech projects, first-year B.Tech ECE/EEE learners exploring sensor networks, and Smart India Hackathon teams building agritech prototypes. ATL Tinkering Lab facilitators will find it a ready-to-use module, and home gardeners or lawn enthusiasts can finally move from guesswork to data-backed lawn nutrition.

Built and Backed by Compoden

Every Compoden kit ships with an AI build companion trained on this exact project — accessible via a QR code on the box, with WhatsApp and email backup. We've spent 10 years building projects for makers, schools, and institutions across India. If a part fails because of a manufacturing defect, replace it free within 7 days.