Hydroponics Nutrient Monitor Kit with Arduino Mega + DHT22
Automated Hydroponics Nutrient Monitor Kit with Arduino Mega & DHT22 — PID Climate Control
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Transform your hydroponics grow into a self-regulating ecosystem that automatically adjusts temperature, humidity, CO₂, and light intensity. This advanced Arduino Mega kit lets you build a multi-sensor monitor that uses PID logic to control servo-driven vents, a relay‑activated fan, and a heater, with real‑time data display and logging.
What You'll Build
A complete hydroponics nutrient monitor that reads two DHT22 sensors for ambient and canopy temperature/humidity, dual soil moisture sensors, a MH‑Z19B CO₂ module, and a BH1750 lux sensor. The Arduino Mega runs a PID algorithm to open/close SG90 servo vents, switch a relay‑driven fan and heater through a 4‑channel relay board, and timestamps every reading via a DS3231 RTC. All data appears on a 0.96‑inch OLED and is saved to a microSD card for analysis.
What You'll Learn
- Calibrating and interfacing I2C (BH1750, OLED, DS3231) and UART (MH-Z19B) sensors with Arduino Mega.
- Designing and tuning a PID control loop for temperature, humidity, and CO₂ regulation.
- Wiring and coding relay logic for safe handling of a 12V fan and heater load.
- Soldering through‑hole and SOIC components on a prototype PCB, including 10kΩ resistors and 100nF capacitors for signal conditioning.
Kit Contents
| Component | Quantity |
|---|---|
| Arduino Mega 2560 | 1 |
| DHT22 | 2 |
| Soil Moisture Sensor | 2 |
| MH-Z19B CO2 | 1 |
| BH1750 | 1 |
| 4-ch Relay Module | 1 |
| SG90 Servo | 2 |
| MicroSD Module | 1 |
| DS3231 RTC | 1 |
| 0.96in OLED | 1 |
| 10kΩ Resistors | 10 |
| 100nF Caps | 15 |
| PCB Prototype Board | 2 |
| 12V Adapter | 1 |
| Soldering Iron | 1 |
| Solder Wire | 1 |
Why Buy This Kit Instead of Sourcing Parts Separately
| Factor | Sourcing Separately | Compoden Kit |
|---|---|---|
| Compatibility checks | You verify every part | Pre-tested as a system |
| Build support | Forums and scattered tutorials | AI companion trained on this exact project |
| Time to first working build | Days of debugging | Hours, with step-by-step guidance |
| Shipping coordination | Multiple sellers, multiple delays | One shipment from Bengaluru in 3-5 days |
Who This Kit Is For
Ideal for B.Tech ECE/EEE students building final‑year or Smart India Hackathon projects, hobbyists from IIT, NIT, VIT, BITS Pilani, and anyone prototyping automated hydroponics or IoT‑enabled greenhouses. If you already know Arduino basics and want a hands‑on advanced system integration challenge, this kit delivers a real‑world agricultural automation tool that you can expand further.
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.
What if I get stuck during the build?
Scan the QR code to chat with the AI companion trained on this exact kit; if you need a human touch, WhatsApp support is included.
Does the kit include everything to start monitoring a real hydroponic system?
Yes, all sensors, actuators (servos, relay module for fan/heater), and power supply are included. You only need to provide the hydroponic reservoir and the 12V fan/heater as loads.
Is the PID code pre-loaded or do I need to write it from scratch?
The AI companion provides a fully functional PID sketch tuned for this hardware. You can upload it immediately and then adjust gains to match your specific environment.
Can I add more sensors or actuators later?
Absolutely. The Arduino Mega has plentiful I2C, UART, and digital pins. The companion suggests common expansions like a pH sensor, peristaltic pumps, or a Wi‑Fi shield.
Hydroponics — DHT22 + soil + CO2 + lux control servo vents, relay fan and relay heater with PID.
What's in this kit
Choose your assembly option:
- Soldering Kit — 25W soldering iron, 60/40 solder wire, flux, and small perfboard for permanent assembly.
- Breadboard Combo — 800-point full-size breadboard with 65-piece jumper wire pack for solderless prototyping.
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Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items