Water Tank Level Monitor Kit v4
Water Tank Level Monitor Kit v4 — Master FreeRTOS Dual-Core Scheduling on Raspberry Pi Pico 2
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Move beyond basic Arduino projects and into real-time embedded systems. This kit challenges you to build a complete water tank monitoring station that runs five independent tasks concurrently — ultrasonic ranging, environmental sensing, audio capture, display rendering, and load profiling — all orchestrated by FreeRTOS on the Raspberry Pi Pico 2’s dual Cortex-M33 processors. The 0.96-inch OLED doesn’t just show tank level; it plots a live CPU load graph, revealing exactly how the scheduler allocates time across cores.
What You'll Build
A fully functional tank monitor that fuses sensor data and visualizes system metrics. The HC-SR04 measures water level, while the DHT22 and BMP280 capture ambient conditions. The MAX9814 mic amp samples audio to demonstrate a background data stream. All tasks report their CPU usage, and the OLED draws a scrolling load graph that updates in real time. You’ll wire the prototype on a PCB board, solder every joint, and watch your kernel-aware application come alive.
What You'll Learn
- Create and manage five concurrent FreeRTOS tasks across dual cores, using task priorities and notifying mechanisms
- Integrate I2C sensors (BMP280) and 1-Wire (DHT22) under preemptive multitasking without bus contention
- Profile task CPU time with vTaskList() and render a continuous load graph on an SSD1306 OLED
- Handle interrupt-driven ultrasonic triggers without starving display and audio capture tasks
Kit Contents
| Component | Quantity |
|---|---|
| Raspberry Pi Pico 2 | 1 |
| DHT22 | 1 |
| BMP280 | 1 |
| MAX9814 Mic Amp | 1 |
| 0.96in OLED | 1 |
| HC-SR04 | 1 |
| 4.7kΩ Resistors | 10 |
| 100nF Caps | 10 |
| PCB Prototype Board | 2 |
| Micro USB Cable | 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
Designed for B.Tech ECE and EEE students exploring RTOS concepts, Smart India Hackathon teams building IoT prototypes, and final-year embedded systems project groups at NIT, VIT, or BITS. If you have programmed a microcontroller before and want to see what a real-time kernel can do, this kit bridges the gap between theory and a working multi-task application.
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 inside your box to access the AI companion, built exclusively for this Water Tank Monitor project. You can also reach us on WhatsApp for hands-on support.
Do I need prior FreeRTOS experience?
Familiarity with C and basic microcontroller programming helps, but the AI companion explains task creation, queues, and scheduler concepts as you go. You’ll learn by doing.
Can I monitor multiple tanks with this kit?
The framework is deliberately expandable. By duplicating the ultrasonic task logic and adding more HC-SR04 sensors, you can scale to multiple tanks — the dual-core scheduler handles it cleanly.
Is soldering definitely required?
Yes, the kit includes a soldering iron and solder wire because you’ll assemble the sensors and OLED onto the prototype board. This project builds your soldering skills alongside the embedded software experience.
Tank Monitoring — FreeRTOS on Pico 2 runs five concurrent tasks on dual cores. OLED shows CPU time per task and load graph.
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.
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