IoT Based Soil Moisture Monitoring Device

![Custom PCB - 3D Render]

A compact, custom-designed PCB for real-time wireless soil moisture monitoring with IoT connectivity.

✨ Overview

This project is a IoT-based Soil Moisture Monitoring System built around a fully custom PCB that I designed. It continuously measures soil moisture levels, displays the data locally, and transmits it wirelessly to the cloud for remote monitoring via any device (phone, computer, or dashboard).

Perfect for:

• Smart gardening & indoor plants
• Precision agriculture
• Greenhouse automation
• Educational projects / DIY IoT

🚀 Key Features

• Real-time soil moisture sensing (analog or capacitive sensor)
• Built-in WiFi for cloud connectivity (ESP8266/ESP32 module)
• Local OLED display for instant readings without internet
• USB-C / Micro-USB programming & power
• Expandable GPIO – easy to add temperature/humidity sensors, relays for auto-watering, etc.
• Low-power design – suitable for battery or solar operation
• Professional custom PCB – clean layout, all components integrated on one board
• Open-source – full schematics, Gerber files, BOM, and firmware included

📸 Hardware

Custom PCB (Designed by me)

![Custom PCB - Top View]

Main components visible on the board:

• ESP WiFi module (ESP8266 / ESP32 compatible)
• OLED display module (SSD1306 0.96" or similar)
• USB interface (programming + 5V power)
• Main microcontroller + supporting circuitry
• Voltage regulator & power management
• Multiple header pins for soil moisture sensor, additional sensors, and peripherals
• Status LEDs and reset/program buttons

Bill of Materials (BOM)

• 1× Custom PCB (order from JLCPCB / PCBWay using the included Gerber files)
• 1× ESP8266 / ESP32 WiFi module (soldered or pre-mounted)
• 1× 0.96" OLED Display (I²C)
• Soil moisture sensor (capacitive recommended to prevent corrosion)
• Optional: LiPo battery + charger circuit, DHT22, relay module, etc.

💻 Software

• Firmware: Written in Arduino IDE (ESP8266 / ESP32 core)
• IoT Platforms supported:
  • Blynk
  • ThingSpeak
  • MQTT (Home Assistant, Node-RED, etc.)
  • Custom web dashboard (included example)

Features of the firmware

• Automatic WiFi connection with fallback AP mode
• Real-time soil moisture percentage display on OLED
• Data logging and cloud upload
• Threshold-based alerts
• Deep sleep mode for battery saving

🛠️ Getting Started

1. Hardware Assembly

1. Order the PCB using the provided Gerber files
2. Solder the components (easy – mostly through-hole + few SMD)
3. Connect the soil moisture sensor to the designated pins (clearly labeled on the silkscreen)
4. (Optional) Add battery holder or solar panel

2. Software Setup

git clone https://github.com/cxt13/Capacitive-soil-moisture-Monitoring
.git
cd Capacitive-soil-moisture-Monitoring