HDMI Switch Manual

Front and back interface diagram, the control interface in the right figure is the remote control interface.A cable with one end being USB-A and the other end being micro USB, labeled with the word "KVM," serves as the control cable. The micro USB end is connected to the control interface of the switch, while the USB-A end is connected to the USB port of the KVM.

Schematic Diagram of Side Interface.

Equipment connection diagram.

If you are using BliKVM software and have powered on the switch and connected the cables before starting BliKVM, no additional configuration is needed. BliKVM will automatically detect the switch when it starts.

If automatic detection fails, you can manually specify the switch device:

1. Confirm the device descriptor name of the switch by using the terminal, such as /dev/ttyUSB0.
2. Edit the switch_handle field in /usr/bin/blikvm/package.json. Set switch_enable to 1 and switch_path to /dev/ttyUSB0 in the configuration.
3. Restart BliKVM.
4. Click MORE in the lower left corner, find the BliKVM switch column, and then switch. Note that the flashing blue dot of the corresponding channel indicates that the switch insertion is recognized and is in the current channel. If there is no blue dot, the switch insertion is not recognized.

If you use PiKVM software, please configure it according to the following instructions.

1. Log in to PiKVM through SSH. The user name and password are root;
2. Uses the rw command on the terminal to change the system to a read-write system;
3. Edit /etc/kvmd/override.yaml. After the original content, add:

   kvmd:
       gpio:
           drivers:
               hk:
                   type: xh_hk4401
                   device: /dev/ttyUSB0
           scheme:
               ch0_led:
                   driver: hk
                   pin: 0
                   mode: input
               ch1_led:
                   driver: hk
                   pin: 1
                   mode: input
               ch2_led:
                   driver: hk
                   pin: 2
                   mode: input
               ch3_led:
                   driver: hk
                   pin: 3
                   mode: input
               ch0_button:
                   driver: hk
                   pin: 0
                   mode: output
                   switch: false
               ch1_button:
                   driver: hk
                   pin: 1
                   mode: output
                   switch: false
               ch2_button:
                   driver: hk
                   pin: 2
                   mode: output
                   switch: false
               ch3_button:
                   driver: hk
                   pin: 3
                   mode: output
                   switch: false
           view:
               table:
                   - ["#Input 1", ch0_led, ch0_button]
                   - ["#Input 2", ch1_led, ch1_button]
                   - ["#Input 3", ch2_led, ch2_button]
                   - ["#Input 4", ch3_led, ch3_button]
   

kvmd:
gpio:
    drivers:
        hk:
            type: xh_hk4401
            protocol: 2
            device: /dev/ttyUSB0
    scheme:
        ch0_led:
        driver: hk
        ...

1. Use the ro command on the terminal to reset the system to a read-only system;
2. Use systemctl restart kvmd on the terminal to restart the service;
3. Enter the PiKVM web interface and click the "GPIO" menu. You should see 4 inputs, one of which has a green circle to indicate that it is currently selected. Click a different input to change the selected host.

If you want to use the blicube switch on other platforms, please refer to the following protocol

• The communication baud rate is 19200
• The message sent to switch by switching to channel 1 isSW1\r\nG01gA
• The message sent to switch by switching to channel 2 isSW2\r\nG02gA
• The message sent to switch by switching to channel 3 isSW3\r\nG03gA
• The message sent to switch by switching to channel 4 isSW4\r\nG04gA
• The message returned by the switch for the current channel is:G01gA,G02gA,G03gA,G04gA