This document describes the wiring for the Smart Plant Watering System using an ESP8266 NodeMCU, DHT11, Soil Moisture Sensor, Relay Module, OLED Display, and a Water Pump ...

Circuit Diagram. Circuit diagram for this IoT Smart Irrigation System is given below: Programming ESP8266 NodeMCU for Automatic Irrigation System. For programming the ESP8266 NodeMCU module, only the ...

This project uses a NodeMCU microcontroller to read the soil moisture level through an analog soil moisture sensor and display the value in percentage on the serial monitor. This is useful for ...