BLIKVM HAT version guide
Introduction
BLIKVM hat Video
The Raspberry Pi IPKVM HAT is an add-on board for Raspberry Pi 4, made especially for KVM Over IP. The BLIKVM-RPI4 is a Raspberry Pi 4 PoE KVM HAT.
This product’s key features include video capture, ATX adapter, PoE, OLED and RTC. The product has a customized metal case to dissipate heat and provide protection for the HAT. The product can be easily installed on a standard 1U rack. The product is currently perfectly compatible with BliKVM image and PiKVM image.
Features
- Video capture (HDMI, support 1080P@50Hz input)
- Keyboard forwarding
- Mouse forwarding
- Mass Storage Drive
- ATX Adapter: Control the server power using ATX functions
- Fullscreen mode
- Access via Web UI
- Multi Language switching support
- PoE support
- Serial console port
- OLED display
- Real Time Clock (RTC)
- PWM FAN
Interface
HAT part:
- HDMI IN
- ATX Port
- OLED
- PoE jumper
Raspberry 4B part:
- SD CARD
- ACT LED
- PWR LED
- USB-PC
- HDMI 0
- HDMI 1
- A/V
- ETH(1000M) & PoE
- 2x USB 2.0 Ports & 2x USB 3.0 Ports
Installation requirements
If you have an assembly kit, you will need the following things
- Raspberry Pi 4B with 1Gb RAM or more.
- HDMI cable.
- Straight Ethernet cable (for the ATX board connection).
- Power supply unit & cable(5.1V 3A USB-C, recommended by the Raspberry Pi).
Basic setup
1. Flash the memory card or eMMC
2. Build BLIKVM according to the video instructions or review the illustrated instructions:
Video Guide: Metal case step by step
3. Install the ATX adapter board
The board has a standard PCIe I/O bracket and a low profile PCIe I/O bracket. Choose one as needed
Use Dupont cables to connect ATX adapter board to motherboard and chassis panel. There are clear pin definitions on the board for easy wiring.
Mount the ATX adapter board to the case shell
Use a RJ45 network cable to connect the board to the CN-ATX interface of the HAT
4. Connect the HDMI cable
Connect the HDMI output port of the computer directly to the HDMI IN port of the HAT with an HDMI cable. The HDMI pass-through EDID emulator is not necessary! If your computer does not output the correct HDMI format, plug the HDMI pass-through EDID emulator into the HDMI output port of the computer. This allows you to configure a fixed HDMI output format on your computer.
5. Install the USB cable
Connect the RPI4 port to the Raspberry Pi 4
Connect the USB port to the controlled computer
When using PoE power supply, there is no need to connect the PWR port. When not using PoE power supply, connect the PWR port to a standard 5V/3A USB power supply.
6. Test
Powered by PoE, the HAT is connected to the router via the network cable
The screen displays the current status of the device, including the machine's IP address
Access the IP address of the HAT in the browser. Enjoy!
Specification
HDMI IN
The bridge chip is Toshiba TC358743, which supports both video and audio(I2S), and the highest input resolution is 1080p@50fps. Fixed HDMI back power issue.
CN-ATX
The CN-ATX interface is connected to the ATX adapter board (an accessory for the HAT) through a network cable, which can turn on, off, and restart the controlled computer.
Display
A white OLED display with a resolution of 128x32, and the chip is SSD1306. This display can show the temperature, IP address and other information of the Raspberry Pi.
PoE
- Standard: IEEE 802.3af PoE
- Input voltage: 37-57 V DC
- Output power: 5 V DC/2.4 A
- Plug in the PoE jumper cap to enable PoE power supply
FAN
The IPKVM HAT is fitted with a small fan that is controlled by your Raspberry Pi via GPIO12.
Real Time Clock (RTC)
The clock chip is PCF8563 that is controlled by your Raspberry Pi via I2C. The coin cell battery is installed under the HDMI IN module.
Accessories
ATX adapter board
This board is connected to the switch port on the motherboard of the controlled computer with DuPont cables. The board has a standard PCIe I/O bracket and a low profile PCIe I/O bracket.
USB/PWR splitter
- Connect the RPI4 port to your Raspberry Pi 4.
- Connect the USB port to the controlled computer.
- When using PoE power supply, there is no need to connect the PWR port. When not using PoE power supply, connect the PWR port to a standard 5V/3A USB power supply.
HDMI pass-through EDID emulator
If the controlled computer does not output HDMI images correctly, please use this accessory. Connect the Source port to the controlled computer, connect the Sink port to the HAT. Then you can set the correct HDMI output on the controlled computer.
Metal case
The metal case protects the HAT and improve heat dissipation. There are clear port markings on the case.
The case can be easily installed on a standard 1U rack.
List
Product List
| Raspberry Pi IPKVM HAT | 1 |
|---|---|
| ATX adapter board | 1 |
| USB/PWR splitter | 1 |
| HDMI pass-through EDID emulator | 1 |
| Metal case | 1 |
| 32G TF card | 1 |
| USB Type-C to USB Type-C Cable 30cm | 1 |
| Dupont Cables 8pin Male to Male 40cm | 1 |
| Dupont Cables 8pin Male to Female 40cm | 1 |
| Phillips screwdriver | 1 |
| Cross Wrench Sleeve | 1 |
List of items prepared by the user
| Raspberry Pi 4 | 1 |
|---|---|
| RJ45 network cable | 2 |
| USB Type-A to USB Type-C Cable | 2 |
| HDMI cable | 1 |
| PoE-sourcing equipment or 5V/3A USB adapter | 1 |
| CR1220 coin cell battery | 1 |
Buy link
Created: June 4, 2022