Smart Pantry Inventory Tracker Kit with ESP32 + LED
Smart Pantry Inventory Tracker Kit — ESP32 Weight Sensor System with OLED Reorder Alerts
Every part needed, pre-tested for compatibility, with an AI build companion trained on this exact project. Shipped from Bengaluru in 3-5 days.
Imagine your pantry jars automatically tracking flour, rice, and dal levels — then alerting you before a container runs empty. This kit uses four 1 kg load cells placed under your kitchen containers to continuously measure weight. The ESP32 reads the HX711 amplifiers, converts the data into remaining quantity in grams, and sends a reorder prompt to the bright OLED screen when stocks dip below your thresholds. No more mid-cooking surprises or overstocking. Built for Indian kitchens where staple inventory management often relies on memory alone, this project brings precision to your weekly grocery planning.
What You'll Build
You will assemble a complete 4‑channel weight‑monitoring station that fits neatly on a standard Indian slab or shelf. Each container sits on its own load cell and HX711 module, wired to a central ESP32 board. The 0.96‑inch OLED display cycles through the live weight and calculated days‑remaining per item. An on‑screen battery‑style bar fills up or empties to show usage trends at a glance. An on‑board SD card logs every measurement with a timestamp from the DS3231 real‑time clock, letting you later analyze consumption patterns on your computer. The build includes soldering the PCB prototype boards to create a stable, permanent sensor hub that slides into the included enclosure box.
What You'll Learn
- Calibrating and interfacing load cells with HX711 analog‑to‑digital converters for precise weight readings under 0.1 g resolution
- Programming the ESP32 to read four sensor channels simultaneously and compute net weight by tare subtraction
- Designing a real‑time clock (DS3231) backup system so timestamps remain accurate even after power loss
- Storing structured weight data on a microSD card using SPI communication for long‑term consumption analytics
- Laying out a compact multi‑module circuit on a prototyping board and housing it in a safe, ventilated enclosure
Kit Contents
| Component | Quantity |
|---|---|
| ESP32 Dev Board | 1 |
| HX711 | 4 |
| 1kg Load Cell | 4 |
| DS3231 RTC | 1 |
| MicroSD Module | 1 |
| 0.96in OLED | 1 |
| LM2596 Buck Converter | 1 |
| 100nF Caps | 10 |
| 4.7kΩ Resistors | 5 |
| PCB Prototype Board | 2 |
| Enclosure Box | 1 |
| 5V 2A PSU | 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
Compoden’s Smart Pantry Kit is designed for experienced makers and engineering graduates — B.Tech (ECE, EEE), M.Tech students, and professional IoT developers working on home automation. If you have already built basic ESP32 projects and are comfortable with soldering and sensor calibration, this advanced system will push your skills in multi‑channel data acquisition and embedded logging. It is also ideal for Smart India Hackathon participants and ATL innovation lab mentors looking for a high‑utility demonstrator that solves a genuine Indian household problem.
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.
How do I calibrate the load cells for accurate weight measurement?
The AI companion guides you through the two‑point calibration routine using known weights (like a 100 g standard mass). You’ll adjust the calibration factor in the ESP32 code until the readings match. If you face drift, WhatsApp support helps you fine‑tune the filter capacitor placement.
Can I send reorder alerts to my phone instead of just the OLED screen?
By default, the kit displays alerts on the OLED. Once you have the base system running, the AI companion shows you how to add Wi‑Fi code to push notifications via Telegram or a simple web dashboard. All hardware is ready for that upgrade.
Which containers work best with this load cell setup in an Indian kitchen?
The kit works best with flat‑bottomed plastic or steel jars weighing less than 800 g when full. We provide a custom 3D‑printable base file (optional) that evenly distributes the jar’s weight onto the load cell, preventing tilting on typical marble or granite shelves.
Does the kit include a soldering iron – do I need to solder all connections?
Yes, a soldering iron and solder wire are included because permanent, reliable connections are essential for long‑term pantry use. The AI companion offers clear soldering video references for the PCB layout, and WhatsApp chat helps if any joint looks suspect.
HX711 load cells under containers track weight. ESP32 estimates quantity remaining and triggers reorder alert.
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.
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