RS485 to LoRa Converter | USR-DR206/DR216-H DIN Rail Mounting | Long Coverage | Diverse Working Modes | Modbus RTU to LoRa USR-DR206-H and USR-DR216-H are LoRa modems that converts RS485 into LoRa. The DR206-H is DC-powered, while the DR216-H supports AC power input. Both models support point-to-point, point-to-multipoint, and point-to-USR-LG210 gateway connections. And also support relay networking and signal detection visualization. When used with the LG210 gateway, it supports custom Modbus and edge collection functions. It enables data transmission between 485 serial ports and the LoRa network. It has the advantages of long wireless transmission distance, high sensitivity in reception, strong anti-interference ability.
Key Features
  • Long Coverage: Wireless transmission up to 6KM
  • Relay Networking: Wireless distance extension
  • Modbus to LoRa: point-to-point, point-to-multipoint, point-to-gateway
  • Industrial Design: Wide temp -40 ℃~ +85°C
  • Point-to-Point/multi-Point: Transparent transmission, fixed-point transmission, master-slave transmission, signal detection, LBT & data re-transmission
  • Point-to-Gateway: Transparent transmission, fixed-point transmission, edge computing, Json reporting， Modbus TCP/RTU conversion
Point to LoRa Gateway Application After user terminal devices form a network via LoRa nodes and the LG210 gateway, the system enables localized zonal management of devices centered around the gateway. This ensures orderly data transmission from multiple nodes without mutual interference, while guaranteeing encrypted data transfer to rapidly achieve end-to-cloud connectivity.
Point to Point/multiple Points Transmission The USR-DR206-H and USR-DR216-H support both point-to-point and point-to-multipoint communication. This device supports various working modes such as data transmission, master-slave mode, fixed-point transmission, and data broadcasting. Users can choose the appropriate mode according to their own needs for use.
Long Transmission Distance Point-to-point communication can achieve a maximum measured transmission distance of 6 KM. Point-to-gateway communication can achieve a maximum transmission distance of up to 4.5 KM as measured in practice.
LoRa Network Repeater The USR-DR206-H and USR-DR216-H support customizable relay transmission paths and multi-level relaying. The module automatically forwards data, extending the wireless transmission distance, making it suitable for communication in ultra-long-distance or obstacle-rich environments.
Signal Diagnosis, Accelerated Network Deployment With the diagnosis Solves the most painful signal challenges in wireless deployment (interference, distance judgment, quality assessment), saving significant debugging time and ensuring stable operation.
LBT Anti-Interference Function Before transmitting data, the module detects the current channel environment. If the threshold is exceeded, it delays and re-detects before sending. This avoids packet loss due to interference and improves communication success rates.
Data Security Data is encrypted during LoRa transmission to ensure enhanced security. Encryption keys are user-configurable; communication is only possible between devices with matching keys.
Other Important Functions The USR-DR206-H and USR-DR216-H also support other functions such as FEC (Forward Error Correction) and data re-transmission, helping users to transmit data more stably.
DIN Rail Mounting Compact Size The product uses a rail mount and features a compact design, taking up little space and making wiring easy, perfect for tight installation spaces.
High-Reliability Design
  • Wide Power Input: DC 8–24V (DR206-H) / AC 110–240V (DR216-H)
  • Wide Operation Temperature: -40℃~ +85℃
  • Hardware Watchdog: ensuring reliable unattended operation without manual intervention
  • Fire-retardant Casing: Fire-retardant PC/ABS material, rated V-0
Product Details
  • Dimension: 28.0*110.0*64.7 mm
  • Serial Port: 1 * RS485
  • Installation: DIN-Rail mounting
  • Reload button: In the case of forgetting the parameters, long press to restore the factory settings
  • LoRa Antenna Connector: SMA female
Packing List
  • USR-DR206-H：
  • USR-DR206-H * 1
  • LoRa Sucker Antenna * 1
  • Power Cable * 1
  • USR-DR216-H:
  • USR-DR216-H * 1
  • LoRa Sucker Antenna * 1
Smart Factory Energy Monitoring The USR-DR216-H connect to sensors inside distribution boxes via RS485 to acquire critical electrical parameters such as voltage, current, and power factor. The collected data is wirelessly transmitted to the USR-LG210-H gateway, which then forwards it to either the PUSR Cloud or a private server for centralized remote management. Leveraging long-range, high-sensitivity LoRa radio technology and robust immunity to interference, the system delivers reliable and stable performance even in harsh industrial environments.
Intelligent Agricultural Applications Farmland sensors are connected to the USR-DR206-H. By setting up wireless data transmission with the LoRa gateway, long-distance sending/receiving and control are quickly achieved. Online monitoring and control of irrigation, pests and diseases, and fertilization are realized, thereby reducing the number of on-site personnel, comprehensively improving farm production management, increasing economic benefits, and lowering operating costs.