e021 MegaSUM Datalogger
Key Features
- 32-bit ARM Cortex-M4 with FreeRTOS — real-time, low-power operation
- 16 Mb internal flash + optional microSD for extended data storage
- RS232, RS485, SDI-12, Ethernet, USB, Wi-Fi and Bluetooth interfaces
- Optional integrated 4G/5G modem for cellular telemetry
- Supports Modbus RTU/TCP, SDI-12, TCP/IP, FTP, SMS and UDP
- Operates from –40 to +60 °C at up to 99% RH
Every Interface You Need
The MegaSUM integrates the full range of interfaces used across meteorological, hydrological and environmental monitoring — from legacy serial sensors to modern IP networks and wireless links.
RS232 / RS485
Serial interfaces for legacy and modern meteorological sensors. RS485 supports multi-drop sensor buses for compact wiring in dense installations.
SDI-12
Industry-standard SDI-12 interface for environmental sensors — direct compatibility with the majority of meteorological, hydrological and soil sensors in the field.
Ethernet
Wired LAN connectivity for high-reliability data transfer, firmware updates and remote management in networked station deployments.
Wi-Fi
Integrated Wi-Fi for flexible wireless network connectivity — ideal for campus deployments, urban monitoring networks and sites with local wireless infrastructure.
Bluetooth
Short-range Bluetooth for local configuration, diagnostics and data download without physical access to the logger enclosure.
4G / 5G Modem (Optional)
Optional integrated cellular modem extends the MegaSUM to remote locations with no local network infrastructure — delivering data over 4G LTE or 5G networks.
Technical Specifications
Speak Any Protocol
The MegaSUM supports all major telemetry and data exchange protocols used in professional environmental monitoring networks — ensuring compatibility with SCADA systems, NMS platforms, cloud services and custom data pipelines.
Built for Reliability
FreeRTOS Real-Time Kernel
The Cortex-M4 running FreeRTOS enables deterministic, real-time task scheduling — ensuring sensor polling, data logging and telemetry transmission occur precisely on schedule regardless of system load.
Layered Data Storage
16 Mb of internal flash provides a reliable local buffer, while optional microSD expansion supports months of high-resolution data at remote sites with infrequent telemetry windows.
Industrial-Grade Ruggedness
The –40 to +60 °C operating range and 99% RH tolerance make the MegaSUM suitable for Arctic installations, tropical coastal stations and everything in between.
Networks Powered by the MegaSUM
The e021 MegaSUM is the intelligent core of a wide range of professional environmental monitoring networks — wherever multi-sensor, multi-protocol data acquisition is required.
Automatic Weather Stations
Acquire data from wind, temperature, humidity, pressure, radiation and precipitation sensors simultaneously over SDI-12, RS485 and RS232 buses — transmitting to central servers via Ethernet, Wi-Fi or cellular.
Hydrological Monitoring
Log water level, flow rate, turbidity and rainfall data across river and reservoir networks — with SMS and UDP alarm transmission for flood early warning system integration.
Energy Meteorology
Support solar irradiance monitoring networks and wind farm met masts — providing high-frequency data acquisition and reliable Modbus TCP communication with energy management systems.
Environmental Networks
Serve as the data acquisition hub for air quality, soil moisture and ecological monitoring networks — combining diverse sensor types on a single logger platform.
Urban Climate Monitoring
Deploy across urban sensor networks with Wi-Fi or cellular backhaul — logging microclimate conditions for heat island studies, smart city platforms and municipal climate services.
Aviation & RWIS
Provide the data acquisition backbone for AWOS and Road Weather Information Systems — collecting multi-sensor data and distributing it to traffic management and aviation operations platforms.
The Backbone of IES Monitoring Networks
The e021 MegaSUM's broad protocol support makes it a natural fit for IES-designed monitoring networks. Its native Modbus TCP and TCP/IP telemetry enable direct data feeds into the IES Met-WebGIS and WAFS-WebGIS platforms, while FTP and UDP transport are used for real-time sensor data pipelines in IES national network deployments.
IES integrates the MegaSUM as the field datalogger in AWS, RWIS and hydrological monitoring solutions, pairing it with partner sensors from Davis, Lufft, OSI and EKO Instruments to create complete, end-to-end monitoring stations.
- Direct Modbus TCP and TCP/IP integration with IES WebGIS platforms
- FTP push for automated data delivery to central data servers
- Paired with Lufft WS600, Davis EnviroMonitor and OSI AWOS sensors
- 4G/5G modem option enables monitoring in remote locations with no fixed network
- SMS alarm capability for early warning network integration
Part of the SIAP+MICROS Family
SIAP+MICROS provides a full range of dataloggers, data transmission units and monitoring system software. The e021 MegaSUM sits at the top of the range — offering the highest connectivity and processing capability for large-scale, complex monitoring installations.
View all SIAP+MICROS productsPairs Well With
Ready to Build Your Monitoring Network?
Contact IES to discuss the e021 MegaSUM for your AWS, RWIS, hydrology or environmental monitoring project — or to request a full technical datasheet and integration guide.