RAK7391 Rapsberry Pi CM4 LoRaWAN Gateway Carrier Board

Description

The RAK7391 is a Raspberry Pi Compute Module 4 (CM4) carrier board. It is a Mini-ITX with multiple slots for radio and WisBlock modules. The RAK7391 is the motherboard in the WisGate Connect.

The RAK7391 is a great board for building your solution, whether a gateway, edge device, or general-purpose computer!

The board has several interfaces to meet the needs of different developers: HDMI, 1GB Ethernet (with optional PoE support), 2.5GB Ethernet, USB2 & USB3, mPCIe, CSI, DSI, M.2, WisBlock...

Of course, it can also be used as a multichannel/multi-band LoRaWAN gateway product supporting up to 4 separate modules (for instance, you can have a 16-channel sub-GHz LoRaWAN gateway plus a 2.4 GHz LoRaWAN gateway in the same device). It has flexible power supply modes such as DC terminal, Phoenix terminal, and POE (optional). The RAK7391 provides a fan interface to dissipate heat for the CPU that you can control based on the CPU temperature. It can monitor the power supply. In the event of a power failure, the ultra-capacitors can provide power to the system, so that the system can send a notification or easily survive micro-cuts in the power supply.

The RAK7391 can also be used as an Industrial gateway, leveraging existing WisBlock modules (ModBUS, 4-20mA, 0-5V, general IO), and an Edge Gateway, a Standalone gateway for a private LoRaWAN deployment and the development platform of your next product.

Hardware

See the hardware compatibility section below.

Accepts the complete range of CM4 module options:

CM4102016: 2GB RAM+16GB eMMC+WIFI

CM4104032: 4GB RAM+32GB eMMC+WIFI

2x WisBlock IO connectors

3x mPCIe slots

1x M.2 B-Key interface

Flexible power supply modes such as DC terminal, Phoenix terminal, and POE (optional)

HDMI 2.0 connector

1 GB Ethernet with PoE support (optional)

2.5 GB Ethernet

1x USB2.0 + 2x USB3.0

Type-C USB socket for updating the CM4

Micro SD Card socket for CM4 Lite modules

Standard fan connector, compatible with 12 V and 5 V fans (jumper cap configuration)

Output power connector (+5 V, +12 V with PoE)

MIPI DSI display FPC connector (22-pin 0.5 mm pitch cable)

2x MIPI CSI-2 camera FPC connectors (22-pin 0.5 mm pitch cable)

Raspberry Pi HAT connector

PoE support via an optional module

Debug UART port

RTC with battery socket and ability to wake up CM4

Configuration jumpers (Wi-Fi and BLE enabling/disabling, EEPROM write enable, Buzzer enabling)

Compatible Hardware

Software

We have prepared a custom Linux distribution for the WisGate Connect called RAKPiOS. The RAKPiOS is a fork of the Raspberry Pi OS with all the required drivers to use the device, some security changes, helper scripts, and Docker included by default.

With the included rakpios-cli, you can easily configure the network and deploy several IoT services from a curated list of Docker containers available from the device.

What's in the kit

1 x RAK7391 CM4 carrier board

1 x RAK5146 LPWAN Concentrator module

A set of jumpers

Phoenix male connector

12V2A power supply

Set of standoffs and screws to protect the board

Set of screws for the MiniPCIe, M.2, and WisBlock slots

Typical Application

LoRaWAN gateway (multichannel, multiband)

Industrial gateway leveraging existing WisBlock modules (Modbus, 4-20mA, 0-5V, general IO)

Edge gateway / Standalone gateway

Development platform for new products

Useful Link:

Hardware Compatibility

WisGate Connect documentation

RAKPiOS OS

Python examples for the RAK7391

Node-RED examples for the RAK7391