IoT Cold Storage Temperature Alert System: Complete FYP Build Guide
Build an IoT cold storage monitoring prototype with ESP32, temperature sensor, alerts and dashboard logging.
Rectronx
2026-07-11
Cold storage monitoring is a practical IoT FYP because temperature changes can affect food, medicine and laboratory samples. A student prototype can demonstrate live temperature monitoring, threshold alerts and history logging.
This project should be presented as an educational prototype, not an industrial certified monitoring system.
Quick Summary
The ESP32 reads cold storage temperature, compares it with a safe threshold, shows status locally, sends alerts when temperature is out of range and logs data to a dashboard.
Recommended Components
- ESP32 DevKit
- DS18B20 waterproof temperature sensor or DHT22 for room demo
- OLED or LCD display
- Buzzer and warning LED
- Firebase, Blynk or MQTT dashboard
- Optional door magnetic switch
- Optional RTC or SD card backup logging
System Workflow
- Sensor reads temperature.
- ESP32 filters repeated readings.
- System compares value with threshold.
- If temperature is unsafe, buzzer and alert activate.
- Data is uploaded to dashboard.
- Report uses history graph and test scenarios as evidence.
Build Scope
Basic version: temperature display and buzzer.
Intermediate version: WiFi dashboard and mobile alert.
Advanced version: door-open detection, offline logging and trend graph.
Testing Plan
Test normal temperature, threshold crossing, sensor disconnection, WiFi failure and repeated readings. Use controlled temperature changes such as ice pack tests instead of claiming industrial calibration.
Common Mistakes
- No sensor calibration note
- Threshold chosen without explanation
- No offline behaviour
- Weak WiFi testing
- Dashboard only shows current value, not history
Report Sections
Include cold-chain problem background, sensor selection, threshold logic, dashboard screenshots, test table and limitations.