Hewasense Product Spec

1.

Power & Battery

USB-C for power and firmware programming, 

5000mAh rechargeable Li-ion battery lasting ~2 years*.

Intelligent power management for extended battery life.

2.

Wireless Connectivity

Hybrid IoT connectivity: Wi-Fi (IEEE 802.11b/g/n, primary) + Cellular (fallback) to ThingsBoard IoT Platform.

BLE 5.0 (Bluetooth Low Energy, IEEE 802.15.1) for seamless integration with iBeacons and nRF52-based sensors.

3.

Environmental Sensors

Carbon Monoxide (CO):ES1-CO-100

 sensor to be used with LMP91000SDX analog front- end

Particulate Matter (PM2.5): Bosch particulate matter sensor BMV080 for high-precision air quality analysis,

Temperature & Humidity: SHT30 & BLE 5.0 sensors (nRF52-based) for accurate real-time climate monitoring.

4. 

Modular Design

Additional metrics for measure based off the needs of the client:

MQ-131 ozone gas sensor- measures ozone concentration (Emitted by air purifiers, germicidal lamps)

MP503 VOC Sensor - VOC Detection (found in detergents, cleaners, paints, air fresheners)

MEMS Nitrogen Dioxide NO2 Gas Detection Sensor (Breakout, 0.1-10ppm) - Gas from vehicle exhaust, power plants, and burning fossil fuels

Sulfur Dioxide sensor- Emitted by burning coal, oil, and diesel — and industrial activity

NB: EPA establishes an AQI for five major air pollutants regulated by the Clean Air Act. Each of these pollutants has a national air quality standard set by EPA to protect public health:

• ground-level ozone

• particle pollution (also known as particulate matter, including PM2.5 and PM10)

• carbon monoxide

• sulfur dioxide

• nitrogen dioxide

Reference: https://www.airnow.gov/aqi/aqi-basics/

5. 

Data Logging & Storage

2GB microSD card for massive historical data storage,

Local storage ensures uninterrupted operation even during network failures.

6.

User Interface & Controls

Multipurpose button for device control and interaction,

LED indicators: Charging, Fully Charged, Device Status,

PWM Buzzer for status alerts and notifications.

7.

Mechanical & Build & Durability

Compact and rugged industrial design, suitable for indoor deployment. Optimized for high-volume production with cost-effective and durable materials.

Can also be used outdoors for air quality data collection in large geographical regions.

8.

Security & Data Integrity

AES-256 encrypted data transmission for secure communication.

Secure OTA firmware updates to ensure long-term reliability.

9.

Deployment & Scalability

Designed for large-scale IoT deployments, supporting seamless device fleet management.

API integration for third-party platforms & cloud analytics.

10.

Edge Analytics/ AI Integration

Mobile alerts on type of pollution detected, and corresponding AQI, AI enabled alerts and metrics

11.

Visualization and Analytics

Provide interactive dashboards and data- centred analytics based on collected sensor data.

12.

Software Integration

Development of a site to enable live streaming of data, data visualization and analytics, mapviews, user alerts and AI integration.

13.

Special Interest Groups

Based on age brackets (most vulnerable age groups are children below 5 years and aged), pre- existing health conditions provide specialized alerts.

Resource: https://www.stateofglobalair.org/resources/africa#kenya

14.

GPS Tracking

Low power GNSS and AGNSS for use of streetview maps to provide insights on most affected pollution areas and type of pollution.

15. 

Inclusivity

Haptic feedback, buzzer sounds, voice feedback (in app) for the blind users.