In IoT data acquisition projects, a DTU is a key device for connecting serial devices to cellular networks. Selection typically requires evaluating several core dimensions: serial interface type, network standard, data transmission protocol, hardware reliability, and remote management capabilities.
Key Specifications of Tespro DTU
· Serial Ports & Interfaces
· Supports RS232 and RS485 serial ports (optional dual or single interface versions)
· Serial baud rate: 1200bps to 115200bps, software configurable
· Adjustable data bits, stop bits, and parity to adapt to various serial devices
· Provides 3.3V/5V power output for external sensors
Network Standard
· Supports 4G LTE Cat 1 / Cat 4, with optional 5G version
· Compatible with global mainstream carrier frequency bands
· Backward compatible with 3G / 2G networks (varies by model)
· Supports Ethernet communication for backup with cellular networks
Data Transmission Protocols
· Supports TCP/UDP transparent transmission for direct connection to various cloud platforms
· Supports MQTT protocol for mainstream IoT platforms
· Supports HTTP/HTTPS POST/GET requests
· Supports registration and heartbeat packets for server identification and status monitoring
· Supports Modbus RTU to Modbus TCP gateway functionality
Hardware Reliability
· Operating Temperature: -40℃ to 75℃
· Protection Rating: IP30 metal housing
· Power Input: Wide-range DC 5-36V, with reverse polarity and surge protection
· Hardware Watchdog: Automatic restart on failure, ensuring long-term operation without freezing
· SIM Slot: Push-push or self-pop type, supports 1.8V/3V SIM cards
Remote Management
· Supports remote parameter configuration and query
· Supports remote firmware upgrade (OTA)
· Supports SMS AT command configuration
· Supports local serial port AT command configuration
Application Scenarios for Tespro DTU
Environmental Monitoring: Data backhaul from water quality stations, air quality monitoring stations, weather stations
Industrial Automation: PLC remote programming, equipment status monitoring
Smart Metering: Remote meter reading for water, electricity, and gas meters
Smart Agriculture: Soil temperature/humidity sensors, greenhouse environment monitoring data transmission
Security Monitoring: Network access for access controllers, alarm panels
Self-Service Equipment: Data transmission for parcel lockers, vending machines, charging stations
Summary
Tespro DTU is an industrial-grade product focused on long-distance data transmission from serial devices, achieving transparent data transmission via 4G/5G cellular networks. Its wide-temperature design, multi-protocol support, and remote management capabilities make it a reliable choice for various remote data acquisition scenarios.
