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
