IoT Data Logger

A compact, production-ready IoT data logger designed and developed entirely by Elcoan Lanka. Built around the ESP32 microcontroller, the device is engineered for long-term unattended deployment in environments where reliable sensing and minimal power consumption are critical.

Hardware Highlights

• ESP32-Based Dual-core processor with built-in Wi-Fi and BLE for flexible connectivity
• 2× External Temperature Sensor Inputs Supports NTC probes only for monitoring two independent temperature zones
• Built-In Temperature & Humidity Sensor Onboard SHT-series sensor for ambient environmental readings
• E-Paper Display Low-power e-ink screen that retains readings even when the device is in deep sleep, providing always-visible status without draining the battery
• Ultra-Low-Power Design Optimised sleep/wake cycles, low-quiescent-current regulators, and efficient power path design to - maximized battery life over months of operation

Firmware & Software

• Written in C++
• Configurable logging intervals and sensor thresholds
• Over-the-Air (OTA) firmware updates via Wi-Fi
• Local data buffering with flash storage for offline operation
• Seamless integration with the Elcoan IoT Platform for real-time dashboards, alerts, and reporting

Use Cases

• Cold-chain & pharmaceutical storage monitoring
• Warehouse and server room environment tracking
• Agricultural greenhouse climate logging
• Industrial process temperature supervision

The device is fully designed, assembled, and tested in-house from PCB layout and enclosure design through to firmware development and production testing.