Clock IoT device type B

Modified on: Wed, 23 Aug, 2023 at 8:02 AM


Product description

In the product package, you will find:

  • Clock IoT device, based on the A20-OLinuXino-LIME2 mini PC;
  • Power supply adapter;
  • Network cable;
  • SD card, inserted in the device.

Front side

  • 1 - power supply port;
  • 2 ь 3 - USB ports;
  • - network connection indicator;
  • 5 - network data transfer indicator;
  • - LAN port;
  • - battery connector;

Back side

  • 8 - switch on/off;
  • - hardware restart (not recommended);
  • 10 - not used;
  • 11 - SD card port;
  • 12 - USB OTG - not used;
  • 13 - HDMI port - for monitor connection;
  • 14 - SATA port - not used;
  • 15 - not used;

Operation instruction

Switching on the device

  • Plug the power supply adapter in port 1. Make sure that the power supply works by checking if a red light comes from port 1
  • Wait between 1 and 5 minutes for the OS of the device to load. The device is ready for work after the loading of the operating system. You can check this from the side ventilation opening  near the network port. If the operating system is loaded, you will see a green LED light. The LED cannot be seen directly, therefore the light coming through the opening is fable.
  • Plug the network cable in port 6.  Make sure if there is network activity by checking the lights of the LEDS of ports  (and 5) .

Switching off the device

Press button 8, hold it for more than 5 seconds until the green light through the side ventilation opening stops. Then you can switch off the device by unplugging the power supply cable.

Important: You CANNOT switch off the device directly by unplugging the power supply  cable, as the Clock IoT device has a built-in battery. In case of voltage drop, the device can work for about two more hours (depending on the battery charge). 


  • Press button 8 and hold it for more than 5 seconds. After the lights stop, press the same button for 5 more seconds. 
  • For a hardware restart, hold button down for about 2 seconds. Please perform a hardware restart of the device, only if upon recommendation from the Clock PMS+ support team.

Work Safety

  • Avoid leaving the Clock IoT without power supply for long periods;
  • Always switch off the device in the instructed manner;
  • Perform a restart only if necessary.


If you have performed all steps to switch on the device and you do not see a green light coming from the side opening after waiting for it for some time as described above, press button 8  down for more than 5 seconds. Wait for some time needed by the OS to load.


The Clock IoT device requires constant OUTBOUND (outgoing) access to:
  • * TCP ports: 80, 443, 22.
  • * TCP ports: 443, 8443, 8883.
  • TCP port 5000
  • UDP port 123 (NTP - Network Time Protocol)
  • Clock does not provide IP ranges as they are subject to change at any moment.
  • Your local network should be different from (or 172.17.0-255.0-255)
  • Clock IoT doesn't need any inbound (incoming) connections/open ports.
  • The Clock IoT Device requires DHCP in the network to automatically obtain its IP address. Fixed IP addresses are not supported.
  • Keep in mind that Clock IoT device need to be placed in the same network as the third party device/system subject to the interface (for TCP/IP protocols) or physically near to the device/system (for USB cabled interfaces). Check each interface for the specific protocol/port requirements.
Important: A Clock IoT device can be connected to only one Clock PMS+ or Clock POS account.


  • The Clock IoT device requires an Ethernet cable (not included) and power adapter (included). A Wi-Fi connection is not supported.
  • The Clock IoT device should be constantly ON. The usage of an uninterruptible power supply (UPS) is recommended. Restarting the device is strongly NOT recommended, as this may lead to device bricking.
  • Device LEDs. The green LED light (power) should be steady. The yellow LED light (SD card read/write) may blink or be steady.

Checking connections/ports

  • Contact your system administrator and find the IP address of the Clock IoT Device. The device hostname of Clock IoT Device is "clockrpi-" followed by the serial number of the device.

    Example: "clockrpi-a02082-000000006ecb6e0b".

    Example host name and local IP in a router

    Example host name and local IP in a router

    Successful connection test:

  • Open a browser and enter the device IP address.
  • The Diagnostics page will be opened
  • Please contact the system administration if any of the checks is marked as Failed and ask them to re-check the above "Network / Firewall" section.

Communication with Third-party software

The purpose of the IoT device is to act as a communication bridge between the Clock PMS+ cloud servers and local servers of third-party systems. Please note that a single IoT device can handle communication with several systems - for example, if you have a Door Lock system and an Elavon card payment terminal, you need only 1 IoT device to handle the communication with both (as long as the requirements outlined below are met). 

Door lock systems

The majority of Door Lock systems require a Clock IoT device for communication. The list includes Salto, VisiOnline, Assa Abloy, Onity, Messerschmitt, Saflok, Hotek, and others. For proper communication between the systems:

  • The Clock IoT device and the door lock server (system) must be connected to the same local (internet) network.

Payment Service Provider

If you are using Elavon as a payment service provider and their payment terminal you will need a Clock IoT device for the communication between Clock PMS+ and the terminal. For proper communication:

  • The Clock IoT device and the card terminal must be connected to the same local (internet) network. 1 IoT device is needed regardless of how many terminals you use.

Receipt (thermal) printers in Clock POS

For the communication between Clock POS and the printers (kitchen receipts, bills) in your F&B outlet you need a Clock IoT device. For proper communication:

  • The Clock IoT device and the printers must be connected to the same local (internet) network. 1 IoT device can process communication with many printers.

Fiscal devices

Communication with fiscal devices for certain counties requires a Clock IoT device. Currently, the integrations with fiscal devices in Greece, Italy, and Romania require a Clock IoT device.

  • Romania - the Clock IoT device and the Datecs fiscal printer with DxPrint driver must be connected to the same local network.
  • Italy - the Clock IoT device and the Epson RT fiscal printer must be connected to the same local network.
  • Greece - the Clock IoT device and the fiscal printer must be connected to the same local network. 

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