Pi Pico W Soil Moisture Irrigation Bot
Pi Pico W Smart Irrigation Bot Kit: Automate Plant Watering with MQTT Event Logging
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Create an autonomous irrigation system that never forgets to water your plants. Using two soil moisture sensors, this kit triggers a miniature pump when the earth turns dry—then logs every event over Wi-Fi via MQTT. You’ll have a complete, timestamped watering record accessible from any device on your network, perfect for balcony gardens, school science fairs, or prototyping a Smart India Hackathon solution.
What You'll Build
You’ll wire up a self-contained breadboard circuit with an OLED dashboard that shows real-time moisture percentages and pump status. The Raspberry Pi Pico W connects to your Wi-Fi and publishes structured MQTT messages each time irrigation runs. By the end, you’ll have a fully automated watering station that keeps plants healthy without manual checking.
What You'll Learn
- Calibrating soil moisture sensors and setting precise threshold values for different plant needs
- Controlling a relay and submersible pump with flyback protection using 1N4007 diodes
- Programming the Pico W in MicroPython to connect to Wi-Fi and publish MQTT telemetry
- Integrating an OLED display to show live sensor readings and system status
Kit Contents
| Component | Quantity |
|---|---|
| Raspberry Pi Pico W | 1 |
| Soil Moisture Sensor | 2 |
| 5V Relay Module | 1 |
| Mini Submersible Pump | 1 |
| 0.96in OLED | 1 |
| 1N4007 Diode | 3 |
| 10kΩ Resistors | 5 |
| Silicone Tube 30cm | 1 |
| 400-pt Breadboard | 1 |
| M-M Wires | 25 |
| Micro USB Cable | 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
Designed for CBSE Class 11–12 students building IoT-based science projects, B.Tech ECE/EEE undergraduates exploring embedded automation, and Smart India Hackathon participants needing a rapid sensor-actuator demo. ATL Tinkering Lab facilitators will also find it an effective, hands-on way to teach MQTT protocols and sensor integration with immediate, visible results.
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 on the box to access the AI companion, which understands this specific circuit and code. You can also message us on WhatsApp for human guidance if you hit a snag.
Can I view the MQTT log on my phone?
Yes, install any MQTT client app like MQTT Dash on Android or use a web-based MQTT viewer. The Pico W publishes messages that any device on the same network can subscribe to.
Do I need to write all the code myself?
No—a pre-written MicroPython script with comments is included. The AI companion can help you modify thresholds or add features without starting from scratch.
Can this system water multiple pots?
With two sensors and one pump already in the box, you can monitor two separate plants. The AI companion can guide you on expanding to more sensors and relay channels using the same breadboard layout.
Soil moisture below threshold triggers relay pump. Pico W posts irrigation events to MQTT log.
What's in this kit
Other projects you can build
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