abhijeetbyte / ndvi-go

This repo contains source code and other resources for Normalized Difference Vegetation Index (NDVI) experiments

NDVI-GO

NDVI stands for "Normalized Difference Vegetation Index". It is a numerical indicator of the health of vegetation, based on the reflectance of light in the near-infrared and visible portions of the electromagnetic spectrum.

The project is designed to use an NDVI sensor module connected to an Arduino board to calculate and display NDVI values on an OLED screen. The schematic and wiring connections are provided below, along with a description of the components used. It also includes an explanation of the NDVI formula and a scale for interpreting NDVI values. The project will hopefully useful tool for those interested in measuring the health of vegetation using NDVI.

Getting Started

Upload this file to your arduino board, and open Serial monitor to see the result.

Wirring connection

NDVI sensor Module

• IR Led -> D9 (digital Pin 9)
• RED Led -> D10 (digital Pin 10)
• IR Sensor -> A1 (analog Pin A1)
• LDR Sensor -> A0 (analog pin A0)

OLED Screen

• SDA -> A4 (analog Pin A4)
• SCL -> A5 (analog Pin A5)

Make a comman GND and VCC/+5V

Note: IR & LDR module must have analog output

Schematics

Working Layout

Comparison

Expression

$$NDVI = { NIR - Red \over NIR + Red}$$

• Reflectance of near-infrared (NIR) and red (RED)
• NDVI value ranges from -1.0 to +1.0

NDVI is a mathematical function of the reflectance values of two wavelengths regions, near-infrared (NIR) and visable (commonly red).

Scale

Reporting Issues & Contributions

Feel free to report issues and contribute to this repository

ndvi-go's Issues

regarding the red led - what wave length should we be using?