RS232/485 to LoRa Converter Long Coverage | Relay Networking | Point to Gateway USR-LG206-H is a LoRa modem that converts RS232/485 into LoRa. It supports point-to-point, point-to-multipoint, and point-to-USR-LG210 gateway connections. It also supports 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, and high hardware protection.
Key Features
  • High-Power Transmission: Wireless transmission up to 8KM
  • Relay Networking: Wireless distance extension
  • Modbus to LoRa: point-to-point, point-to-multipoint, point-to-gateway
  • Industrial Design: EMC Level 3 | 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-LG206 supports 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-LG206 supports 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-LG206-H also supports other functions such as FEC (Forward Error Correction) and data re-transmission, helping users to transmit data more stably.
Industrial-Grade Design, High Reliability
  • EFT Protection: Level 3. Protect device against damage caused by instantaneous current interference in circuit, such as lightning stroke, power switch, etc.
  • ESD Protection: Level 4. Prevent electrostatic damage equipment, such as dust electrostatic, electric arc environment etc.
  • Surge Protection: Level 3. Protect devices from voltage spikes such as lightning stroke, power switch, etc.
  • Watchdog: Hardware & software dual watchdog to ensure stable operation without downtime.
  • Wide Operation Temperature: -40℃~ +85℃.
  • Wide Power Input: 9~36V, reverse polarity protection.
Product Details
  • Dimension: 102.2 * 86 * 25 mm
  • Serial Port: 1 * RS232/RS485
  • IO Interface : 1 * DI, 1 * DO
  • Power Input: DC 9-36V
  • LoRa Antenna Connector: SMA female
Packing List
  • USR-LG206-H * 1
  • LoRa Sucker Antenna * 1
  • Female-to-Female Cable * 1
Smart Factory Energy Monitoring The USR-LG206-H connects via serial port to water/electricity meters and detection sensors in the factory. It forms a self-organizing network with the LG210 gateway for long-distance LoRa wireless data transmission. The gateway then connects to the management platform via Ethernet. The platform or gateway periodically polls the sensors and meters to obtain their status information, thereby enabling energy monitoring functionality.
Smart Livestock Application Wireless feeding, smart environmental control, and biosecurity scenarios utilize LoRa for communication, replacing traditional RS485. Adopting a master-slave polling mode to collect data from and control terminal devices, thereby achieving precision management, improving production efficiency, and reducing operating costs.
Intelligent Agricultural Applications Farmland sensors are connected to the USR-LG206-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.