Service mode

This mode serves for uploading or backing up the operating system, or for restoring access to the PLC (restoring the default password via OS reflash, changing the network configuration or enabling/disablíng the SSH access). Only the service web interface is available in this mode, all remaining PLC functions are disabled. This mode does not publish mDNS record.

Gate

The service mode is accessed using the SERVICE button located above the red LED on the Unipi Gate device front plate. As the device's Ethernet ports work in bridge mode (br0 = ETH0 + ETH1) when the device is in the service mode, the ports should never be connected into the same network. The mode is physically indicated by the PWR diode continously emitting with the remaining LEDs blinking (demonstration here / startup simulator here).

1) On a local network (with DHCP):

  1. Connect the device to a local network with a DHCP server, using a network cable (RJ45)
  2. Press and hold the SERVICE button
  3. Plug in the device's power supply. After a moment the Unipi Gate will switch to service mode indicated by slow flashing of ACT, RX and TX LEDs
  4. You may now release the SERVICE button.
  5. You also need to obtain the device's IP address. You can do so either from the DHCP server or by using a suitable program, such as Advanced IP Scanner

2) Direct connection to the device (without DHCP):

  1. Connect the device to your PC with a network cable (RJ45)
  2. Press and hold the SERVICE button
  3. Plug in the device's power supply. After a moment the Unipi Gate will switch to service mode indicated by slow flashing of ACT, RX and TX LEDs
  4. You can now release the SERVICE button
  5. Set the IP address of your PC to 192.168.200.100, mask 255.255.255.0
  6. Unipi Gate now has its IP address set to 192.168.200.200

As the next step for both cases, enter the device's IP address into your web browser's address bar. Upon confirmation, you will be connected to the Unipi Gate service interface.

Upon opening the service interface, you can see a blue ribbon on top of the screen and four dialogue windows.

On the right side of the ribbon, there are two buttons:

  1. Run shell → serves for access to a console with limited options (BusyBox)
  2. Restart system → reboots the controller

Under the ribbon are the following dialogue windows:

  1. Settings → contains four buttons, all of them useable only in the regular mode::
    • Set DHCP on br0 interface → sets the bridge interface to obtain the address from DHCP
    • Set 192.168.200.200 on br0 interface → sets the bridge interface to fixed 192.168.200.200 IP address00
    • Enable ssh → enables SSH access on port 22 (SSH is enabled by default)
    • Disable ssh → disables SSH access
  2. Backup → contains the “Backup to USB flash” button which creates an OS back-up stored on a compatible USB flash disk (if inserted)
  3. Software update → serves for uploading the OS into the device
    • A text field for uploading the archive.swu (containing the OS image) is placed directly under the window's label
  4. Messages → displays a list of performed operations