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Raspberry Rpi IoT Gateway with 4G LTE, 5 x RS485, RS232 - RGX-870M

Industrial IoT Gateway - Raspberry Pi compatible
4G/LTE - GPS - CAN - RS485/232 - Sensor
NodeRed, MQTT, REST, J1939, CANopen, Codesys etc.
Power-Saving - Robust - Ultracompact
RGX840 IoT Gateway mit LTE GPS CAN RS485/232
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RGX-870M - Mobile IoT Gateway Raspberry Pi compatible

The RGX-870M LTE / 4G IoT Gateway was specially developed to implement a wide range of industrial and mobile IoT applications with the least possible time and development effort. The system is based on a freely programmable Debian Linux system with full Node-RED support. Other operating systems can also be run. The powerful and extremely energy-saving, industrial-grade RPi-compatible ARM Quadcore platform is compatible with modern software packages and ensures fast execution even with demanding applications.


Fully Raspberry Pi compatible software platform

The RGX-870M system supports the Debian 9 / Stretch based Raspbian headless operating system. The training period is very short, applications can be implemented quickly, easily and inexpensively.

Extensive range of interfaces

An extensive set of industry standard interfaces is available for coupling and collecting the data on site:

  • LAN, RS485 / RS232 ports and terminal connection
  • CAN ports
  • Digital-IO, 1-Wire, I2C, M-Bus,
    Acceleration, onboard temperature
  • HDMI display port
  • Customizations and
    Extensions are possible at any time

Modern radio technology

The integrated 4G / LTE technology of the RGX-870M ensures reliable, wireless internet access. The automatic fallback to 3G and 2G guarantees optimal internet availability. A fail-safe permanent link technology was developed for the cellular connection. The connection is established automatically and automatically restored at any time in the event of an interruption. The radio module can be fully controlled and also reset by software. The integrated WiFi module can be operated in both client and access point mode. Both at the same time are also possible. The also integrated Bluetooth interface of version V4.1. offers BLE functionality. For example battery-operated sensors according to the BLE standard can be connected. A Bluetooth interface of version 5.0 BLE long range is also optionally available.

Quick and easy implementation of the application with NodeRED

The RGX-870M system supports a ready-to-use Node-RED installation in the latest version. The version is equipped with full functionality including the compilability of nodes. Specially developed nodes are included for the operation of all hardware components. Furthermore, nodes for standard protocols such as Modbus-TCP, Modbus-RTU etc. are available. Node-RED typically reduces the development time for specific application systems considerably and can be used at any time for professional productive systems. Axotec also offers development support for new developments or modifications of nodes and applications.

Powerful and energy-saving industrial RPi computer platform

IoT applications are characterized by very different ranges of requirements. The powerful and extremely energy-saving computer architecture with simultaneous compatibility with the RPi platform, which is widely used in the industry, ideally meets the requirement:

  • 1.2 GHz QuadCore system with 1 GB RAM
  • 4GB to 128GB onboard flash memory
  • EMMC and microSD technology
  • Compatible with industry standard Raspberry Pi
  • Power consumption from 3-4 watts
  • extended temperature range
  • Power control

Free programmability

For programming the RGX-870M, all common programming languages are available in their current version through the use of the standard Debian system. Examples are C / C ++, Python Version V3.8, NodeJS V12, Java V11, PHP V7, HTML, CSS and SQL etc. Tried and tested systems such as Netbeans, Eclipse, Remote GDB etc. are available as development systems.

Open standard Debian system

RGX-870M comes with an operational Debian Linux. It is a fully featured standard Debian system. This means that practically all common software packages are available and can be installed automatically with the push of a button. Examples are Apache, LightTPD, NPM, MySQL, SQLite, PostgreSQL, Docker, Paho, Codesys etc. The standard Debian operating system is of course freely configurable. Access to the command line is already set up and accessible via the serial terminal interface and via network and ssh access. Axotec offers development support for the connection of specific hardware such as RFID readers, barcode readers, USB adapters, sensors, etc.

Cloud connection to the leading providers or to your own cloud

The connection to the common cloud providers such as Microsoft Azure / Amazon AWS / Google Cloud / Cumulocity is possible without any problems. A connection to a private cloud is also easy to implement. The common required services and protocols such as MQTT and REST are ready for operation.

Support of all common VPN technologies

VPN technology is regularly used for secure data transmission. Often the VPN technology used cannot be freely selected due to existing infrastructures or other reasons. Therefore, the RGX-870M supports the common VPN technologies OpenVPN and IPsec. OpenVPN, StrongSwan and Wireguard can be used directly as packages. Axotec can offer support with the configuration and commissioning of VPN technology.

TPM Security

An integrated TPM chip is optionally available. This has a wide range of possible uses in the area of security for IoT applications, for example for storing cryptographic keys, for generating real random numbers and for authentication. TPM2 software stack support is available as well as e.g. authentication with cloud services.

Power supply with wide range input

Power can be supplied with DC voltages between 9 and 40 volts. The supply input is reverse polarity protected and protected against overvoltages. External control of the switch-on and switch-off process is optionally available. Switching on and off is then carried out via a status input. The shutdown process is automatically controlled by software, so that a safe and controlled shutdown of the computer is guaranteed.

Highest operational safety

The RGX-870M Embedded Computer has a low power consumption and operates without a fan. The reliability of the software system is optimally supported by the integrated hardware watchdog for 24/7 operation. The 4G module as well as WiFi, Bluetooth and the USB interfaces can be reset separately via software.


A ready-to-use Codesys implementation is also available for the RGX-870M system. With this RGX-870M can e.g. operated as a soft PLC. CANopen and J1939 stacks are automatically included.

Specification RGX-870M




Linux Operating System

Debian 10 / Buster based RaspiOS system with full access to software, tools and know-how of the Raspberry Pi


1.2GHz Cortex A53 Quad core

Flash 8 GB up to 128 GB onboard Flash memory
Main Memory

1GB Low Power DDR2 memory


CAT4 150MBit/s download, 50 MBit/s upload (maximum values)
Dual-Band TDD-LTE B38/B40, Five-Band FDD-LTE B1/B3/B7/B8/B20, Dual-Band UMTS/HSDPA/HSPA+ B1/B8, Dual-Band GSM/GPRS/EDGE 900/1800 MHz
Power and Reset of the module can be controlled independently via software

4G Antenna Connector

SMA female connector, Optional: auxiliary antenna connector, optional FAKRA connector


Protocol: NMEA-0183, GPS supports MS/UE-based, MS/UE-assisted and hybrid modes with AFLT (CDMA), NMR (GSM), and MRL(UMTS, WCDMA, LTE), standalone and network-aware modes , A-GPS
Accuracy: 2.5m (CEP50) TTFF (Open Sky), Hot start <1s, Cold start 35s , GPS: Cold start sensitivity: -148dBm, Tracking sensitivity: 159 dBm, GLONASS: Tracking sens. -158 dBm

GNSS Antenna Connector

SMA female connector, integrated power supply for active antennas, optional FAKRA connector

Integrated WiFi

Optional WiFi 802b/g/n with external antenna connector (combined with external Bluetooth antenna if option is present)

Integrated Bluetooth

Optional Bluetooth V4.1, V3.0+HS, V2.1+EDR
with external antenna connector (combined with external WiFi antenna if option is present)

CAN-Bus, 2.0A/2.0B




1 x 10/100 BaseT Ethernet Port

USB Host

2 x USB host 2.0 high speed 480MBit/s, Power supply of each USB port can be controlled by software
So the USB device can be reset by software without user intervention

RS232 Console

1 x RS232 - Console interface

RS232 / RS485



(please see FLEX product version)

0/1/2 isolated/non isolated RS485 interface
or RS232 interface
RS485 12MBit/s speed available

additional 0/1 nonisolated RS485 interface
or RS232 interface (BT is disabled with this option)

Digital Inputs

8 digital, isolated inputs

0/4/8/10 digital, isolated inputs

Digitale Outputs

4 digital outputs

0/2/4/6 digital outputs


Optional: HDMI interface type A connector


Battery-buffered RTC

Sensors integrated

3-Axis acceleration: +-2G,+-4G,+-8G, Temperaturesensor: -40°C..+85°C
optional: integrated gyroscope

1-Wire -


Sensor Port


0/1/2 Port(s) for external sensors like temp./hum. lum., gyroscope etc.

Status LEDs

1 x Power on,1 x eMMC access, 4 user-programmable LED's
LTE/4G status

Hardware Watchdog

Hardware Watchdog for automatic reboot trigger


Hidden button for starting a user-specific program or script

Power Supply

Wide range DC input 8..40 Volts with polarity protection, Industrial connector
very low power consumption from ~ 3 watts


Optional: Intelligent power control by means of a power control input
The power supply can be switched on and be switched off by software, e.g. by ignition line


Storage: -40°C..+85°C, Standard operational: 0°C..+70°C non condensing
Wide Temperature models, operational extended: -20°C..+70°C non condensing,
-30°C..+70°C non condensing with onboard microSD


Sturdy aluminum housing, Dimensions: ca. 102 x 95 x 38

Mounting options

Mounting brackets, DIN-Rail holder


RGX840 IoT Gateway mit LTE GPS CAN RS485/232

SMA Antenna Connectors

The RGX-870M product family is available with both FAKRA antenna connectors and SMA connectors.
FAKRA automotive connectors are standardized connectors with both mechanical and color coding of the corresponding functions, such as 4G in violet color or GPS in blue color.
SMA connectors are widely used standard antennas. Many antennas are offered as standard with SMA plugs.
It should be noted that there are male and female connectors and moreover so-called inverse connectors. In the case of the inverted plugs, the arrangement remains threaded and the union nut but inside the plug, the pin and socket are reversed.
The RGX-870M computer family is equipped for 4G with SMA standard female connectors.
The antenna must therefore have an SMA standard male connector. WiFi is equipped with an R-SMA connector.

Mounting Brackets

The Bracket option makes it easy to attach the RGX-870M In-Vehcile Computer to flat mounting surfaces. This ensures a stable and easy mounting of the RGX-870M.


The horizontal DIN rail mount option allows the RGX-870M In-Vehcile computer to be mounted on a standard DIN rail. The horizontal mounting option is chosen when space is limited to the front.
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