Warehouse Temperature & Fire Monitoring Node

Problem statement

Large warehouses and storerooms lack continuous monitoring of temperature and fire risk, leading to late detection of hazardous conditions.

Abstract

This project develops a small IoT node that combines temperature-humidity (DHT22) and smoke sensors with a microcontroller. It periodically sends readings over Wi-Fi or LoRa to a central dashboard. Local buzzer alerts are given for extreme conditions. Multiple nodes can be deployed around a warehouse.

Components required

• Microcontroller (ESP8266/ESP32 or Arduino + LoRa)
• DHT22 temperature and humidity sensor
• Smoke/gas sensor (MQ-2/MQ-135)
• Buzzer and status LED
• Enclosure and mounting hardware
• Power supply or battery pack
• Central receiver / gateway (for LoRa)

Block diagram

Working

Sensors feed environmental data to the microcontroller, which checks them against maximum allowable limits. If values exceed safe thresholds, it activates the local buzzer and sends an urgent message to the gateway or cloud. Under normal conditions, it periodically transmits readings for logging and visualization.

Applications

• Warehouse and cold storage monitoring
• Lab safety and environmental logging
• Smart building fire monitoring
• Intro to multi-sensor IoT networks