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IoT Commercial CleanTech Appliance Client: CleanTech Systems Ltd.

Smart Water Dispenser

An automated contact-free smart water purification and dispensing kiosk. Features noise-immune capacitive proximity sensing, precise flow-meter calibration, UV-C sterilizer monitoring, and real-time filter degradation telemetry to AWS IoT via MQTT over Wi-Fi.

ESP32-S3 Dual-Core AWS IoT Core MQTT Noise-Immune Capacitive Touch FreeRTOS
Touch Latency < 15ms
Flow Accuracy ±2% Calibrated
Cloud Uptime 99.95%
Active Kiosks 500+ Nodes

The Challenge: Contact-Free Hygiene & Predictive Filter Telemetry

In high-traffic commercial offices and public transport hubs, touchscreens and physical push-buttons present hygiene concerns and suffer mechanical wear. Moreover, water filtration consumables are frequently changed either too early (wasting filter life) or too late (degrading water purity).

Embedded India developed an intelligent contact-free dispensing controller with cloud telemetry.

Hardware Innovation

  • Sub-Surface Capacitive Sensing: Custom copper sensor geometry routes through 4mm tempered glass without false triggers from moisture or condensation.
  • UV-C LED Lifetime Monitoring: Real-time photodiode feedback ensures bacterial inactivation threshold (254nm emission) is consistently maintained.
  • AWS IoT Cloud Telemetry: Pushes volumetric consumption, TDS water purity indices, and pump duty cycles every 60 seconds over TLS-secured MQTT.

Results

  • 0 physical buttons: 100% contactless gesture activation.
  • 35% reduction in consumable maintenance costs through predictive filter replacement alerts.
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