IoT-Based Temperature & Humidity Monitor

1. Project Overview:
We are seeking qualified freelancers or development teams to deliver a comprehensive IoT-based remote monitoring system for temperature and relative humidity. Each Wi-Fi-enabled device should report data to a centralized web dashboard, support offline data logging, and include:
A loud audible alarm for threshold violations
A display to show live readings and custom messages
Support for unlimited device integration via dashboard
2. Scope of Work2.1 IoT Device Hardware Requirements:
Microcontroller: ESP32 or equivalent with onboard Wi-Fi
Sensors:
Temperature and Relative Humidity (SHT31, BME280, or equivalent)
Display Module:
LCD / OLED / TFT display to show:
Current Date and Time (from RTC or NTP)
Real-time Temperature and Humidity
Customizable user-defined text (e.g., Location, Site ID, message)
Local Audible Alarm:
Loud buzzer or siren (≥ 80 dB)
Triggers when temperature or humidity goes out of threshold range
Must function even if Wi-Fi/internet is lost
Offline Data Logging:
Local storage (EEPROM/SD card/Flash)
Store data during Wi-Fi outages and sync upon reconnection
Other Features:
LED status indicators for Power, Wi-Fi, Alarm
OTA firmware update support
Configurable data upload interval (default 5 mins)
2.2 Web Dashboard Requirements:
Device Management:
Add, edit, and remove devices
Assign names, location, threshold values
Live Monitoring:
Real-time display of all devices and their readings
Visual alerts for devices in alarm status
Threshold & Configuration:
Admin can set per-device min/max temperature and humidity limits
Custom text for each device (displayed on the hardware)
Data Visualization:
Time-series charts (filterable by date, device, location)
Downloadable reports (CSV, PDF)
Alarm & Notification Logs:
List of all threshold breaches with timestamps
Email notifications for threshold violations (SMS optional—quote separately)
Access Control:
Admin and Viewer role support
Responsive Design:
Compatible with mobile, tablet, and desktop
Optional: REST API/WebSocket for integration
2.3 Cloud & Hosting Setup:
Cloud-based backend deployment (AWS / Firebase / Azure preferred)
Secure database (Firebase, PostgreSQL, or MySQL)
API or MQTT broker configuration for device data ingestion
Deployment instructions with documentation
3. Deliverables:
Fully working IoT prototype device with:
Sensor, display, loud alarm, offline storage
Source code for:
Firmware (with comments and config files)
Web dashboard (frontend + backend)
Complete circuit diagram, wiring layout, and BOM
Hosting/deployment guide for backend
Admin & user manuals
One working device shipped for evaluation (optional—quote separately)
4. Key Functional Features:
FeatureIncludedWi-Fi-based Device Communication✅Loud Audible Alarm✅Offline Data Logging & Sync✅Real-time Dashboard✅Unlimited Device Support✅Customizable Display (Date/Time/Text)✅Remote Threshold Configuration✅OTA Firmware Updates✅
5. Timeline:
Total duration: 6 weeks
Proposal should include milestone breakdown:
Hardware prototype
Firmware & dashboard development
Integration & testing
Final documentation and delivery
6. Budget:
Estimated total: $2,500 – $4,500
Break down pricing into:
Hardware & firmware
Web dashboard & backend
Optional device shipping or mobile app
7. Proposal Submission Requirements:
Please submit:
Introduction and relevant experience
Technology stack and proposed hardware components
Timeline with milestone chart
Budget breakdown
Portfolio or links to past work
Any assumptions or clarifications
8. Evaluation Criteria:
Experience with full-stack IoT projects
Quality of proposed architecture and design
Ability to handle scalable deployments
UI/UX of dashboard
Delivery commitment and post-deployment support
9. Notes:
NDA may be required after initial selection
Preference for developers who can handle end-to-end delivery
This is a pilot phase for potential large-scale deployment

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