RS485-NB - RS485/UART to NB-IoT Converter


The Dragino RS485-NB is a versatile RS485/UART to NB-IoT Converter, essential for modern IoT solutions. It allows seamless connection of RS485 or UART sensors, facilitating data upload to IoT servers via NB-IoT network. Integrated with Telemetry2U, it provides real-time dashboards, instant alerts, and historical data analysis. With customizable payload decoders and downlink commands, it interfaces with any device having a digital output. Its efficient power management and long battery life make it ideal for diverse applications.

New customers will enjoy 60-Day's FREE access on Telemetry2Us' IoT Platform. Read more here...

Live Demo

Manufacturer: Dragino
$135- +GST
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Streamlined Sensor Data Integration


The Dragino RS485-NB serves as a critical link between RS485 or UART sensors and IoT servers, enabling consistent data transmission over the NB-IoT network. It's designed to read sensor data periodically, making it a cornerstone in IoT ecosystems.

Telemetry2U Integration for Enhanced Monitoring: Through Telemetry2U, this converter offers real-time data visualisation on dashboards, instant alerts via email, SMS, and voice calls, and access to historical data. Its ability to support custom payload decoders and downlink commands allows for versatile interfacing with various digital output devices.

Optimised Power Management: The RS485-NB provides both 3.3v and 5v outputs to power external sensors. These outputs are controllable, significantly reducing the system's overall power consumption, a critical feature for energy-efficient operations.

Flexible Connectivity for Diverse Needs: Supporting a range of uplink methods, including MQTT, MQTTs, UDP, and TCP, the RS485-NB is adaptable to different IoT servers. This flexibility caters to varied application requirements, enhancing its utility.

User-Friendly Configuration: Designed with BLE configuration and OTA updates, the converter is straightforward to use, simplifying device management and ensuring users are always up-to-date with the latest software.

Long-Term Reliability: Powered by an 8500mAh Li-SOCI2 battery, the RS485-NB is built for longevity, offering several years of reliable service without frequent battery replacements.



Choose the 12-Month Subscription with Telstra SIM



When you select one of the "12-month IoT Platform Subscriptions", we'll handle all necessary configurations for seamless integration into Telemetry2U's IoT platform. If you also ordered a Telstra 500KB NB-IoT SIM card with your device, That'll also be installed and configured prior to shipment. The SIM card is locked to the device and the data capped at 500KB, so there is no chance of any suprise charges. 

IoT Platform Features

Check out a Live Demo of the Telemetry2U IoT Platform in Action

See how easy it is to add your own Dragino NB-IoT Devices to Telemetry2U

Attribute name Attribute value


  • NB-IoT Bands: B1/B2/B3/B4/B5/B8/B12/B13/B17/B18/B19/B20/B25/B28/B66/B70/B85 @H-FDD
  • Ultra-low power consumption
  • Support multiply RS485 devices by flexible rules
  • Support Modbus protocol
  • Support Interrupt uplink
  • Supports connecting a UART sensors with 3.3V or 5V
  • Multiply Sampling and one uplink
  • Support Bluetooth v5.1 remote configure and update firmware
  • Uplink via MQTT, MQTTs, TCP, or UDP
  • Uplink on periodically
  • Downlink to change configure
  • 8500mAh Battery for long term use
  • Nano SIM card slot for NB-IoT SIM 


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

Common DC Characteristics:

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


I/O Interface: 

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


NB-IoT Spec:

NB-IoT Module: BC660K-GL

Support Bands:

  • B1 @H-FDD: 2100MHz
  • B2 @H-FDD: 1900MHz
  • B3 @H-FDD: 1800MHz
  • B4 @H-FDD: 2100MHz
  • B5 @H-FDD: 860MHz
  • B8 @H-FDD: 900MHz
  • B12 @H-FDD: 720MHz
  • B13 @H-FDD: 740MHz
  • B17 @H-FDD: 730MHz
  • B18 @H-FDD: 870MHz
  • B19 @H-FDD: 870MHz
  • B20 @H-FDD: 790MHz
  • B25 @H-FDD: 1900MHz
  • B28 @H-FDD: 750MHz
  • B66 @H-FDD: 2000MHz
  • B70 @H-FDD: 2000MHz
  • B85 @H-FDD: 700MHz



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


Power Consumption:

  • STOP Mode: 10uA @ 3.3v
  • Max transmit power: 350mA@3.3v

DataSheet, Document Base

User Manual -- Online Latest

Shared Folder for all Dragino Products