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RS485 / UART to LoRaWAN Converter – RS485-LB

The Dragino RS485-LB is a RS485 / UART to LoRaWAN Converter for Internet of Things solutions. User can connect RS485 or UART sensor to RS485-LB converter, and configure RS485-LB to periodically read sensor data and upload via LoRaWAN network to IoT server. RS485-LB can interface to RS485 sensor, 3.3v/5v UART sensor or interrupt sensor. RS485-LB provides a 3.3v output and a 5v output to power external sensors. Both output voltages are controllable to minimize the total system power consumption. RS485-LB is IP67 waterproof and powered by 8500mAh Li-SOCI2 battery, it is designed for long term use for several years. RS485-LB runs standard LoRaWAN 1.0.3 in Class A. It can reach long transfer range and easy to integrate with LoRaWAN compatible gateway and IoT server. For data uplink, RS485-LB sends user-defined commands to RS485 devices and gets the return from the RS485 devices. RS485-LB will process these returns data according to user-define rules to get the final payload and upload to LoRaWAN server. For data downlink, RS485-LB runs in LoRaWAN Class A. When there is a downlink commands from LoRaWAN server, RS485-LB will forward the commands from LoRaWAN server to RS485 devices.

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Features

  • LoRaWAN v1.0.3 Class A
  • Ultra-low power consumption
  • Support multiply RS485 devices by flexible rules
  • Support Interrupt uplink
  • Support Modbus protocol
  • Supports connecting a UART sensors with 3.3V or 5V
  • Support Bluetooth v5.1 and LoRaWAN remote con­figure
  • Support wireless OTA update fi­rmware
  • Uplink on periodically
  • Downlink to change confi­gure
  • 8500mAh Battery for long term use
  • AT Commands to change parameters

Application

  • Smart Buildings & Home Automation
  • Logistics and Supply Chain Management
  • Smart Metering
  • Smart Agriculture

Specifications

I/O Interface:

  • +5v controllable output
  • Battery controllable output (2.6v ~ 3.6v depends on battery)
  • RS485/UART to LoRaWAN Converter
  • RS485-LB
  • 1 x UART Interface, 3.3v or 5v
  • 1 x RS485 Interface
  • 1 x I2C Interface
  • 1 x Interrupt or Digital IN/OUT pins
  • 1 x one wire interface

Common DC Characteristics:

  • Operating Temperature: -40 ~ 85°C
  • Supply Voltage: 2.5v ~ 3.6v

LoRa Spec:

  • RX sensitivity: down to -139 dBm.
  • Max +22 dBm constant RF output vs.
  • Frequency Range, Band 1 (HF): 862 ~ 1020Mhz, Band 2 (LF): 410 ~ 528Mhz
  • Excellent blocking immunity.

Battery:

  • Self-Discharge: <1% / Year @ 25°C
  • Capacity: 8500mAh
  • Li/SOCI2 un-chargeable battery
  • Max boost current: 2A, 1 second
  • Max continuously current: 130mA

Power Consumption:

  • LoRa Transmit Mode: 125mA @ 20dBm, 82mA @ 14dBm
  • Sleep Mode: 5uA @ 3.3v

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Frequently Asked Questions

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