R1520LG Universal LoRaWAN Gateway

R1520LG, Robustel’s next-generation LoRaWAN gateway, excels in dense indoor environments with robust 4G/3G/2G and WiFi support. Integrated with Chirpstack LoRa network server, it efficiently manages traffic. Featuring 2 x Ethernet, 1 x RS232, and 1 x RS485, along with POE-PD, it’s ideal for smart buildings and industrial IoT, ensuring reliable connectivity.

  • Key Features
  • Specification
  • Downloads
  • Model

R1520LG is Robustel’s new and unique LoRaWAN gateway, optimized for high volume in-building applications.The product has been designed to be very cost-effective and extremely versatile – providing a solution for all deployment scenarios including:

  1. External LNS with a choice of packet forwarders – UDP / Basic Station / Loriot
  2. Internal LNS (Chirpstack) with full customer control
  3. Internal LNS (Chirpstack) + “E2C Chirpstack” – NEW & UNIQUE!
  4. Robustel’s “E2C Chirpstack” software connector allows LoRa sensors to be connected directly into AWS & Azure cloud environments.
  5. E2C Chirpstack can be used alongside E2C Modbus in the R1520LG to get data from wired and wireless sensors easily into the cloud.

RCMS is Robustel’s free router monitoring service that is fully compatible with the R1520LG. It allows customer to see a location overview of their routers quickly and simply on a map. Features such as data usage, signal strength, current network and much more can then be viewed on a per router basis. Over-the-air updates are supported for Firmware, router configuration and Apps serving as essential “insurance” if anything was not quite right during deployment. You can try Robustel’s free router management platform by signing up here: https://rcms-cloud.robustel.net


Key Features

  • Supports POE for optimal location of Gateways
  • WiFi Client and AP Supported
  • Wide 9 to 60V DC power input
  • Dual Ethernet ports providing WAN & LAN connections
  • Dual SIM slots for resilient cellular communications
  • RS232 & RS485 for peripheral connection
  • Supported by “Operations Console” – Robustel’s unique Gateway management environment
  • RobustVPN provides easy remote access to all Gateways no matter what SIM/internet connection type is used
  • “E2C Chirpstack” provides a simple connector for  LoRa data – directly into AWS/Azure or other cloud platforms
  • “E2C Chirpstack” provides data buffering of LoRa data – not usually available in standard LoRa gateways
Hardware System
CPU i.MX 6ULL, 792Mz
Flash 8 GB eMMC


Celluar Interface
Number of antennas 2
Connector SMA-K
SIM 2 Mini SIM (2FF)


Ethernet Interface
Ports 2 x 10/100 Mbps, LAN or WAN
WAN port Support 802.3 at PD feature on ETH0
Magnet isolation protection 1 KV


LoRa Interface
Number of antennas 1
Connector SMA-K
Frequency *(In progress) US915, CN470, EU868, AU915
Max transmitted power +25 dBm
Max sensitivity -140 dBm
Channel Capacity Supports up to 8 channels receive data simultaneously


Serial Interface
Type 1 x RS232 + 1 x RS485
Connector 2 x 3-pin 3.5 mm female socket
ESD protection 8 KV air, 4 KV contact
Baud rate 300 bps to 115200 bps
Signal RS232: TXD, RXD, GND; RS485: Data+ (A), Data- (B), GND


WIFI Interface
Number of antennas 1
Connector RP-SMA-K
Standards 802.11 b/g/n, supports AP and Clients modes
Frequency bands 2.4 GHz
Security WEP, WPA, WPA2
Encryption 64/128 AES, TKIP


Reset button 1 x RST
USB 1x USB 2.0 (host), Type A, 500 mA
LED indicators 1 x RUN, 1 x MDM, 1 x USR, 1 x RSSI, 1 x WLAN, 1 x LoRa
Watchdog External


Software (Basic features of RobustOS Pro)
LoRaWAN protocols V1.0.4 Class A/Class B/Class C
Network protocols PPP, PPPoE, TCP, UDP, DHCP, ICMP, NAT, HTTP, HTTPs, DNS, ARP, NTP, SMTP, Telnet, VLAN, SSH2, DDNS, etc.
VPN tunnel IPsec, OpenVPN, GRE
Firewall DMZ, anti-DoS, Filtering (IP/Domain name/MAC address), Port Mapping, Access Control
Management Web, CLI, SMS
Serial port Transparent, TCP Client/Server, UDP, Modbus RTU Gateway
Other Smart Reboot


Operating System RobustOS Pro (Based on Debian 11 bullseye)
Supported programming language C, C++, Python, Java, Node.js, etc.
(for users to develop own applications)
Flash available for SDK 6 GB
RAM available for SDK 256 MB


App Center (Available Apps for RobustOS Pro)
Apps* L2TP, PPTP, DMVPN, VRRP, QoS, SNMP, Language, RCMS, Dynamic route, Captive Portal, Modbus Master, etc.
*Request on demand. For more Apps please visit www.robustel.com.


Power Supply and Consumption
Connector 4-pin Micro-Fit socket
Input voltage 9 to 60V DC; PoE-PD: 42.5 to 57V DC
Power consumption Idle: 1.5W
Data link: 10W (peak)


Physical Characteristics
Housing & Weight Plastic, 238.5g
Dimensions 105 x 90 x 46 mm
Installations Desktop, wall mounting and 35 mm DIN rail mounting
Operating temperature -20 to +60 °C
Storage temperature -40 to +85 °C
Relative humidity 5 to 95% RH


Regulatory and Type Approvals *(In progress)
Environmental RoHS2.0*
*See ordering information for details about other certifications



RobustOS Pro Software Manual


*All Robustel Firmware and RobustOS Apps are now available to download from the App Centre section of RCMS Cloud.

If you don’t already have access to RCMS Cloud you can Sign Up  freely.

*Please contact our Technical Support if you have any trouble finding the resources.

Model PN LoRa Frequency Cellular Frequency Bands* Country
(*In progress)
R1520LG-470M-AA-4L-A35GL B137001 470 MHz 4G: LTE FDD: B1/B2/B3/B4/B5/B7/B8/B12/B13/B18/B19/B20/B25/B26/B28/B66
LTE TDD: B34/B38/B39/B40/B41
3G: WCDMA: B1/B2/B4/B5/B6/B8/B19
2G: GSM: B2/B3/B5/B8
R1520LG-868M-AB-4L-A35GL B137002 868 MHz EU CE*
R1520LG-915M-AC-4L-A35GL B137003 915 MHz AU RCM*
R1520LG-902M-AD-4L-A35GL B137004 902 MHz US FCC*
R1520LG-470M-AA-NU B137005 470 MHz CN
R1520LG-868M-AB-NU B137006 868 MHz EU CE*
R1520LG-915M-AC-NU B137007 915 MHz AU RCM*
R1520LG-902M-AD-NU B137008 902 MHz US FCC*

*For more information about frequency bands in different countries, please contact your Robustel sales representative.

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