In industrial automation and environmental monitoring, numerous PLCs, meters, and sensors come with RS232 or RS485 serial ports. Short communication distances and high cabling costs have long been challenges for engineers. How can serial device data be transmitted over long distances to monitoring centers? How can remote, unattended sites send back data?
Tespro DTU is designed to solve exactly this problem. It transmits serial data via 4G/5G cellular networks or Ethernet to cloud servers, enabling transparent data transmission and remote monitoring.
What is a DTU? How is it different from an industrial router?
This is a common question during IoT project selection. Simply put, a DTU focuses on "data transfer." Its main function is to transmit serial device data via cellular networks to a specified server. An industrial router, on the other hand, provides complete routing functions, offering network access to multiple downstream devices. The key difference: DTUs are better suited for remote data transmission of a single serial device, offering lower cost and simpler deployment, while industrial routers are designed for multi-device networking scenarios.
Core Function of Tespro DTU: Serial to 4G/5G Transparent Transmission
Tespro DTU features an industrial-grade 4G LTE module and supports RS232 and RS485 serial ports, allowing connection to various serial devices. With simple configuration of server IP and port, the DTU automatically packages and sends serial data to the cloud, while also forwarding cloud commands back to serial devices. The process is "transparent" to the device, requiring no modification for remote communication.
In real applications, what specific problems can a DTU solve?
Many engineers face these issues when deploying remote monitoring systems: no wired network on site, high cost and long lead time for fiber installation, Wi-Fi signals unable to reach outdoor equipment, and serial communication limited to tens of meters. Tespro DTU uses 4G/5G cellular networks to achieve remote data transmission wherever there is cellular signal. Whether it's a flow meter at a wastewater treatment plant, a pressure sensor at an oilfield wellhead, or an anemometer at an outdoor weather station, Tespro DTU sends all this data back to the monitoring center in real time.
Industrial Design for Harsh Environments
Tespro DTU uses industrial-grade components, with an operating temperature range of -40℃ to 70℃, and features surge and reverse polarity protection. The metal housing effectively shields against electromagnetic interference. Whether installed in a cold outdoor cabinet in the north or a hot distribution box in the south, Tespro DTU runs stably without disconnection or packet loss.
How to select a DTU? What key factors should be considered?
When selecting a DTU, several key factors deserve attention: interface type (does it support both RS232 and RS485?), network standard (does it support 4G/5G and mainstream carrier frequency bands?), protocol support (does it support TCP/UDP transparent transmission, MQTT, etc.?), environmental adaptability (does the operating temperature range meet site conditions?), and registration/heartbeat packet functionality (for server device identification and connection maintenance). Tespro DTU is carefully designed across all five dimensions to meet the needs of most remote data acquisition scenarios.
Quick Deployment, Easy Maintenance
Tespro DTU supports remote parameter configuration and firmware upgrades, allowing engineers to maintain devices without frequent site visits. With the heartbeat packet mechanism, servers can sense DTU online status in real time and quickly locate anomalies when they occur.
If your on-site serial devices face challenges with short communication distances, difficult cabling, or unreachable networks, Tespro DTU provides a convenient channel for getting your data to the cloud.
