HummingBoard IIOT & RZ/V2N SOM Quick Start Guide
Introduction
The following quick start guide provides background information about the HummingBoard IIOT.
The guide will give a technical overview about the product and by the end of it you should be able to boot an operating system and begin testing your application.
Revision and Notes
Date
Owner
Revision
Notes
20 Nov 2025
Yazan
1.0
Initial release
Hardware Setup
Product specifications
Model
HummingBoard RZ/V2N IIOT SBC
Processor
Renesas RZ/V2N SOM 4 x Arm Cortex-A55 1 x Cortex-M33 Up to 1.8 GHz
Memory & Storage
Up to 8GB LPDDR4 Up to 128GB eMMC MicroSD
AI Accelerator
DRP-AI3 (15 Sparse TOPS / 4 Dense TOPS)
Display
MIPI-DSI
I/Os
2 x RS232, 2 x RS485, or RS232 + RS485 2 x CAN-FD 2 x USB2.0 1 x USB3.2 1 x MIPI-CSI 4 lanes
Networking
2 x Ethernet RJ45 10/100/1000 1 x 802.11 a/b/g/n/ac WiFi and Bluetooth (2.4/5 GHz)
Misc.
GPIO RTC EEPROM
Power
7V – 32V PoE sink support 802.3at Reverse polarity support
Expansion card I/Os
M.2 B-Key LTE modem (eSIM, NanoSim)
Temperature
Industrial: -40°C to 85°C
Dimensions
PCBA: 88 x 135 mm Enclosure (Optional): 150 x 145 x 40mm
Enclosure
Extruded aluminum
Supported with RZ/V2N SOM. For more detailed information about our SOM RZ/V2N series please visit this user manual : RZ/V2N SOM Hardware User Manual .
Block Diagram
The following figure describes the RZ/V2N Block Diagram.
Visual features overview
Please see below the features overview of the connector side of the HummingBoard IIOT & RZ/V2N SOM.
Print side connector overview of the HummingBoard IIOT & RZ/V2N SOM.
Power Input Polarity [J1]:
Connector Type: Green two-terminal connector [J1].
Voltage Range: 7V to 32V.
Polarity:
+ (Positive): Left terminal (as marked in the image).
- (Negative): Right terminal (as marked in the image).
Plug for connector J1 : 2 Position Terminal Block Plug, Female Sockets 0.138" (3.50mm).
J5004 {2x RS485, 2x CAN-FD, 2x RS232, DIG_IN, DIG_OUT}
Plug for connector J5004 : 20 Position Terminal Block Plug, Female Sockets 0.138" (3.50mm) like this.
Software Setup
Cable setup and prerequisites
Here is what you will need to power up and use the board:
Linux or Windows PC
HummingBoard IIOT with SOM
12V Power adapter (HummingBoard IIOT has wide range input of 7V-28V), alternatively you can use a PoE injector to power on the device.
Type-C to USB for console, the HummingBoard IIOT has an onboard FTDI chip.
IP router or IP switch
Boot Select
Before powering up the board for the first time it is recommended to select the boot media using onboard DIP switch S5:
Switch
1 (MD0)
2 (MD1)
3 N/A
4 N/A
5 (VDD_3.3V)
6 (VDD_1.8V)
SPI
OFF
ON
X
X
OFF
ON
eMMC
ON
OFF
X
X
OFF
ON
Serial Dowanloder
ON
ON
X
X
OFF
ON
MDx = BOOT_MODEx. VDD_BOOT can be either 1.8V or 3.3V (selectable via S5[5] or S5[6]).
BOOT_MODE2 = ‘1’ → fixed to 1.8V at the SOM level
BOOT_MODE3 and BOOT_MODE4 → fixed to GND at the SOM level Note: MD1 and MD0 are swapped between PCB version 1.1 and PCB version 1.0.
Note: To boot from eMMC on the HummingBoard-IIoT, we need to account for the internal pull-up on MD_BOOT1. To ensure MD_BOOT1 is pulled low to a valid logic ‘0’, the following resistor changes are required on the HB-IIoT carrier board:
Replace R42 from 100 kΩ to 1 kΩ
Replace R36 from 4.7 kΩ to approximately 47 Ω
These resistors are located close to the S5 DIP switch, as shown in the figure below.
Booting from SPI and loading Yocto from uSD card
Set the Boot Switch to SPI Boot Mode
Here is the correct DIP switch position for SPI boot:
Note: The black rectangle represents the switch position. The unit comes with a pre-programmed bootloader on the SPI NOR flash.
Once you set the switches, you can apply the following for booting from an SPI card.
Downloading the Yocto image
Download the Debian image by running the following command on your Linux/Windows PC:
For more Debian releases, please visit https://images.solid-run.com/renesas/rzv2n.
Writing the image to the SD card
Use the following commands for writing the image to an SD card:
For more information, please visit Flashing an SD Card .
Note: Plug a micro SD into your Linux PC, the following assumes that the micro SD is added as /dev/sdX and all it’s partitions are unmounted.
SD card insertion
Please Insert the SD card into your device.
Power connection
Connect your power adaptor to the DC jack, and then connect the adaptor to mains supply.
Serial Connection
Please insert the micro USB into your device, then you can refer to Serial Connection for installing necessary serial connection software in Linux/Windows.
Once you installed the necessary serial connection software, you should be able to see the following:
In order to be able to log in, please insert “root” as a username and password.
Streaming USB Webcam Video from RZ/V2N Yocto to a PC
This section describes how to stream live video from a USB webcam connected to a SolidRun RZ/V2N board running Yocto Linux, and display the video on a remote PC (Linux or Windows) over the network using GStreamer. The streaming pipeline uses MJPEG over RTP, which is supported by most USB webcams and does not require hardware H.264 encoding on the device.
GStreamer provides command-line tools for capturing, encoding, sending, receiving, and displaying video streams.
1. Yocto Image Requirements
v4l2 support
GStreamer core + good/bad/ugly plugins
v4l-utils (recommended)
Suggested additions to local.conf if missing:
2. Installing GStreamer on the PC
For Ubuntu/Debian distros:
For Fedora/RHEL distros:
For Windows:
Download the Installer: Go to the GStreamer official website and download the appropriate installer for your Windows version.
Run the Installer: Execute the downloaded file. During installation, select "Complete Installation" to install all basic plugins.
Set Environment Variables: To use GStreamer from the command line, add GStreamer to your system's PATH as described here.
For Windows, you might need to configure the Firewall to allow the stream. Make sure that 10.0.0.2 is a private network.
3. Verifying Webcam Detection on RZ/V2N (Yocto)
Before streaming, verify that the USB webcam is detected.
Check USB enumeration
Example:
Check video devices
Expected:
If no /dev/video0 found
Enable UVC driver:
Check supported formats
Typical output:
Note: The Logitech C922 supports MJPEG, so MJPEG-over-RTP streaming is used.
4. Network Streaming Overview
The RZ/V2N board captures MJPEG frames from the USB webcam (
/dev/video0).Frames are packetized into RTP and sent via UDP to the PC on port 5000.
The PC receives the RTP stream, extracts the MJPEG frames, decodes them, and displays the video.
5. GStreamer Commands
5.1 On the RZ/V2N (Sender – Yocto)
Replace <LAPTOP_IP> with the IP address of the PC receiving the video.
Example: 192.168.33.17
Pipeline explanation
v4l2src – captures video from the webcam
image/jpeg – requests MJPEG format
rtpjpegpay – packetizes JPEG frames into RTP
udpsink – sends RTP stream to the PC
5.2 On the PC (Receiver)
Linux (Ubuntu, Fedora, Debian, etc.)
Windows (PowerShell)
Pipeline explanation
udpsrc – receives RTP packets
rtpjpegdepay – extracts MJPEG frames
jpegdec – decodes JPEG video
autovideosink – displays the video on the PC
TLV EEPROM Support
RZ/V2N SoMs are being programmed with identifying information such as the product name, MAC Address and SKUs to allow for programmatic identification of hardware.
Bootloader Firmware Flashing (BL2 + FIP)
The SD card image only contains the Linux kernel and root filesystem. The bootloader firmware — BL2 (Trusted Firmware-A first stage) and FIP (U-Boot + BL31) — must be programmed separately to either SPI NOR flash or the eMMC boot partition.
Flashing Methods
The Firmware Flashing Guide covers three methods for programming the bootloader:
Serial Flash Writer
Initial programming or recovery — board boots via SCIF in Serial Downloader mode
U-Boot CLI
Field updates from a USB drive — no host PC connection required
Linux
In-system updates from a running Linux image via MTD (SPI NOR) or mmcblk0boot0 (eMMC)
Each method supports both SPI NOR flash and eMMC boot storage. See the full guide for step-by-step commands, flash memory layout, and DIP switch (S5) boot mode settings.
Build Artifacts
After a Yocto build, the firmware files are in tmp/deploy/images/rzv2n-sr-som/:
bl2_bp_mmc-rzv2n-sr-som.bin
BL2 for eMMC boot
fip-rzv2n-sr-som.bin
FIP image (TF-A BL31 + U-Boot)
Flash_Writer_SCIF_RZV2N_SR_SOM_8GB_LPDDR4X.mot
Flash Writer for serial programming
List Of Supported OS
Build from source
Documentation
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