reComputer Mini Hardware and Interfaces Usage
This wiki introduces the various different hardware and interfaces on the reComputer mini J40 series and how to use them to expand your project ideas.
Carrier Board
Power
reComputer Mini is equipped with a 9-60V (XT30) power interface, compatible with a wide voltage input range (9V to 60V), making it suitable for various power supply environments.
Display
The product is equipped with a Type-C port featuring Host + DP (DisplayPort) functionality, which means it not only supports data transfer but also allows you to connect a monitor via this port, enabling high-quality video output.
M.2 Key E for WIFI and Bluetooth
The reComputer Mini features a M.2 Key E interface, through which you can expand the device's Bluetooth and Wi-Fi capabilities.
We recommend using the Intel Dual Band RTL8822CE Wireless NIC.
Hardware Connection
Usage Instruction
After installing the Wi-Fi module and powering on the device, we can configure the device's Wi-Fi and Bluetooth settings.
Of course, we can also check the device's operating status using the following commands.
ifconfig
bluetoothctl
M.2 Key M for SSD
M.2 Key M is an interface designed for high-speed solid-state drives (SSDs), providing ultra-fast data transfer speeds, ideal for high-performance applications.
Out of the box, reComputer Industrial includes a 128GB industrial-grade SSD connected to the M.2 Key M slot with x4 PCIe Gen3, which is pre-installed with JetPack system.
Hardware Connection
If you want to remove the included SSD and install a new one, you need to ensure that your SSD meets the following two conditions:
- Support the M.2 Key M slot with x4 PCIe Gen3 interface.
- Conform to the 2242 size specification.
Usage Instruction
Open the terminal in Jetson device and enter the following command to test the SSD's read and write speed.
sudo dd if=/dev/zero of=tempfile bs=1M count=1024 conv=fdatasync
Please run sudo rm tempfile command to delete the cache files after the test is complete.
USB
The reComputer Mini carrier board has a total of 4 USB ports: 2 USB 3.2 Type-A ports, 1 USB 2.0 Micro-B port for flash, and 1 USB 2.0 GH1.25 port.
Usage Instruction
We can enter watch -n 1 lsusb -tv in the Jetson terminal to probe the USB ports. Once a USB device is connected, the detailed information about that port will be displayed here.
Additionally, you can refer to M.2 Key M to test the read and write speed of USB storage devices.
Please note, before testing, use the cd command to navigate to the folder where the USB storage device is mounted.
For the usage of the USB Micro-B interface, please refer to this wiki for a detailed tutorial.
RTC
The reComputer Mini features RTC interfaces, providing accurate timekeeping even when the system is powered off.
Connection Connection
Connect a 3V CR2302 coin cell battery with JST connector to the 2-pin 1.25mm JST socket on the board.
FAN
The onboard fan interface of the reComputer Mini is managed by the nvfancontrol daemon, which adaptively adjusts the fan speed based on the operating status of the Jetson module. We can configure the working mode of the daemon through its configuration file /etc/nvfancontrol.conf.
For more information, please check here.
Additionally, we can manually set the fan speed using the jtop tool.
Tech Support & Product Discussion
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