Industrial Edge Computing LoRaWAN Gateway - LG3120e
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Industrial Edge Computing LoRaWAN Gateway – LG3120e

Industrial Edge Computing LoRaWAN Gateway with 4G, eSIM, Wi-Fi, Serial and I/O

The Robustel LG3120e is a high-performance industrial LoRaWAN gateway built for sites where connectivity and local intelligence need to arrive together. Running on RobustOS Pro (Debian 11 Bullseye) on a Quad-core ARM Cortex-A53 at 2.0 GHz with 2 GB DDR4 RAM and 6 GB of SDK-available flash, it processes, filters, and acts on field data locally — reducing cloud dependency and the latency that comes with it.

A native LoRaWAN Network Server handles LoRaWAN V1.0.4 Class A and Class C device management on-device across EU868, AU915, US915, and AS923 frequency plans. Pre-installed device profiles and codecs for major LoRa sensor families enable zero-configuration onboarding — attach a supported sensor and it begins reporting without manual decoder setup.

MFF2 eSIM alongside a physical Mini SIM (2FF) slot, dual cellular antennas, and dual-band Wi-Fi 6 (802.11 a/b/g/n/ac/ax, 2.4 GHz and 5 GHz) provide flexible backhaul. TPM 2.0 provides hardware-level key storage and attestation. An onboard RTC retains timekeeping for up to five days after power loss — relevant for remote sites where power interruptions are a known operational condition.

Fleet operations are managed through RCMS: real-time device status, geospatial dashboard, OTA firmware and configuration delivery, and RobustVPN for secure remote access without a site visit.

LG3120e Datasheet

Categories: ,

Description

System Architecture

Operating System

RobustOS Pro

CPU

Quad-core ARM Cortex-A53@2.0 GHz

RAM

2 GB LPDDR4

Flash

8 GB eMMC

Cellular

Supported Technologies

4G/LTE, 3G, 2G

Antennas

2 (MAIN + DIV)

Connector

SMA-K

SIM

1 x Mini SIM (2FF)

eSIM

1 x eSIM (MFF2); GSMA SGP.22 compliant; supports profile download/removal and typically up to 8 eSIM profiles

Ethernet

Ethernet Ports

2 x 10/100 Mbps, LAN or WAN

Magnet Isolation Protection

1.5 kV

LoRa

Antennas

1

Connector

SMA-K

Frequencies

US915
EU868
AU915
AS923

Channel capacity

Supports up to 8 channels receiving data simultaneously

Serial Port

Serial Ports

2 x RS-232/485 (software configurable)

Connector

6-pin 3.5 mm terminal block with lock

Baud Rate

300–115200 bps

Signal Definition

RS-232: TXD, RXD, GND
RS-485: Data+ (A), Data- (B), GND

Digital Input/Output

DI/DO Ports

2 x DI + 2 x DO, wet contact

Connector

8-pin 3.5 mm terminal block with lock (DI/DO)

Absolute Maximum Voltage

+30 VDC

Absolute Maximum Current

100 mA

Signal Definition

DI1+, DI1-, DI2+, DI2-, DO1+, DO1-, DO2+, DO2-

Wi-Fi Interface

Number of antennas

1, supporting only 1T1R

Connector

RP-SMA-K

Standards

802.11 a/b/g/n/ac/ax; supports AP and client modes

Frequency bands

2.412–2.472 GHz (2.4 GHz ISM band)
5.15–5.825 GHz (5 GHz ISM band)

Other Interfaces

TPM

TPM 2.0

Reset Button

1 x RST

LED Indicators

1 x RUN, 1 x RSSI, 1 x MDM, and 1 x USR

microSD

1 x microSD, supporting up to 2 TB

Watchdog

External

USB

1 x USB 2.0 (host), Type A, 5 V, 500 mA
1 x USB 2.0, Type C, console port

RTC

Remains functional up to 5 days after power loss

Power Supply & Consumption

PSU Connector

2-pin 3.5 mm terminal block with lock

Input Voltage

12/24 VDC, 9–36 VDC
Reverse polarity protection, surge protection

Power Consumption

Idle: 1.5 W@12 V
Max: 15 W@12 V

Recommended Power Supply

12 V DC/1.5 A power adapter

Physical Characteristics

Ingress Protection

IP30

Housing & Weight

Metal, 587 g

Dimensions

49 x 105 x 128 mm

Installation Options

Desktop, Wall Mount and 35mm DIN Rail

Operating Temperature

-25 – +70°C

Storage Temperature

-40 – +85°C

Relative Humidity

5 – 95% RH (non-condensing)

Software Features

LoRaWAN Protocols

V1.0.4 Class A/Class C

Network Protocols

PPP, PPPoE, ARP, VLAN, ICMP, NAT, TCP, UDP, DHCP, DNS, DDNS, NTP, HTTP, HTTPS, Telnet, SSH2, SMTP, Static Routing, etc.

VPN Tunnels

IPsec, OpenVPN, GRE, L2TP, PPTP, DMVPN, WireGuard

Firewalls

DMZ, anti-DDoS, Filtering (IP/Domain name/MAC address), Port Mapping, Access Control

Remote Management

RCMS, Web, CLI, SMS

Serial Port Protocols

Transparent, TCP Client/Server, UDP, Modbus RTU Gateway

SIM Management

Smart Roaming V3, Language, eSIM Management, E2C Field Suite

Optional Apps

Request on demand

Software Development Kit (SDK)

Supported Programming Languages

C, C++, Python, Java, Node.js, etc. (for users to develop own applications)

Flash available for SDK

6 GB

RAM available for SDK

1.5 GB

Regulatory and Type Approvals

Environmental

RoHS 2.0

EMI

EN 55032 Conducted Emission Class B
EN 55032 Radiated Emission Class B

EMS

EN 61000-4-2 (ESD) Level 3
EN 61000-4-3 (RS) Level 3
EN 61000-4-4 (EFT) Level 3
EN 61000-4-5 (Surge) Level 3, AC Mains Power Port; Level 3, Signal Ports
EN 61000-4-6 (CS) Level 3

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