Gravio Hub X64 Documentation
Table of Contents
- 1. Gravio Hub X64 Hardware Specifications
- Wi-Fi Signal Strength and Speed Guidelines
- 2. How to Restore Gravio Hub X64 to Factory Settings
- 2.1 Restore from the Recovery Partition (Gravio 6.4.0 and later)
- 2.2 Restore Using the SD Card (Gravio 6.3.x and earlier)
1. Gravio Hub X64 Hardware Specifications
Hardware Specifications
| Item | Specification |
|---|---|
| OS | Ubuntu 24.04 (OS image of Gravio 6.4.0 and later) / Ubuntu 22.04 (OS image of Gravio 6.3.x and earlier) |
| CPU | Alderlake N100 |
| Memory | 12G |
| Internal Storage | 512G |
| Wireless LAN | Intel/WIFI5/2.4G/5G/BT4.2 |
| I/O | 3xUSB3.2, 2xHDMI2.0(4K 60Hz), 1xGiga LAN, 1xTYPE-C(USB/PD3.0), 1WiFi(Intel WiFi5), 1SSD M.2 2242(PCIE3.0/SATA) |
| Weight | 190g |
| Operation Environment | 5℃〜35℃ |
| LTE Support | Not built-in (Gravio 6.3.2 and later supports WAN connection via LTE USB dongles: SWD01 / Soracom Onyx SC-QGLC4-C1) |
Wi-Fi Signal Strength and Speed Guidelines
The following are guideline values for signal strength (RSSI) and speed when connecting Gravio Hub X64 via Wi-Fi (2.4 GHz band). Use them as acceptance criteria when surveying an installation site to determine whether stable communication is possible.
| Band | Channel Width (Router Setting) | RSSI: Acceptable | RSSI: Not Acceptable | Link Rate (Theoretical) | Throughput (Effective) |
|---|---|---|---|---|---|
| 2.4 GHz | 20 MHz | ≥ -65 dBm | ≤ -75 dBm | 144 Mbps | Approx. 60–80 Mbps (approx. 8–10 MB/s) |
| 2.4 GHz | 40 MHz (40 MHz must be enabled on the router) | ≥ -65 dBm | ≤ -75 dBm | 300 Mbps | Approx. 120–180 Mbps (approx. 15–22 MB/s) |
- RSSI: The strength of the signal received by Gravio Hub X64. It is expressed as a negative value in dBm; the closer to 0, the stronger the signal (for example, -60 dBm is stronger than -70 dBm).
- Between -65 dBm and -75 dBm: Communication may work, but stability is not guaranteed. Consider improving the installation environment, for example by relocating the router (access point) or adding a repeater.
- Link rate (theoretical): The maximum wireless rate negotiated between Gravio Hub X64 and the router. It is not the rate at which data can actually be transferred.
- Throughput (effective): A guideline for the rate at which data can actually be transferred. It varies depending on radio interference, obstacles, the number of devices connected to the same router, and other factors.
- Router Wi-Fi standard: Gravio Hub X64 communicates using the Wi-Fi 4 (IEEE 802.11n) standard. Therefore, the link rates above are the same whether the router supports Wi-Fi 4, 5, 6, or 7.
- 40 MHz channel width: Even if the router is set to 40 MHz, it may operate at 20 MHz depending on the surrounding radio environment, in which case the link rate becomes 144 Mbps.
Note: Measure the signal strength at the exact position where Gravio Hub X64 will be installed (including its height and nearby metal objects, walls, and so on).
2. How to Restore Gravio Hub X64 to Factory Settings
How to restore Gravio Hub X64 to its factory settings depends on its OS image.
- OS image of Gravio 6.4.0 and later: Restore from the recovery partition. No SD card is needed.
- OS image of Gravio 6.3.x and earlier: Restore using the SD card.
A Gravio Hub X64 with an OS image of 6.3.x or earlier can also be restored from the recovery partition after it has been moved to the OS image of 6.4.0 or later with "OS Update (Disk Layout Migration)" in the Web UI.
Caution: Both methods erase all Hub data and settings. Back up the data you need beforehand in "Maintenance > Backup/Restore" in the Web UI.
2.1 Restore from the Recovery Partition (Gravio 6.4.0 and later)
The OS image of Gravio 6.4.0 and later keeps a copy of the OS installer in a recovery partition on the internal disk. You can restore the factory settings from the boot menu, without an SD card or a USB stick.
- Connect a display and keyboard to the Gravio Hub X64 and restart it (if it is off, press the power button to start it).
- In the menu shown at startup (the GRUB menu), choose "Restore Ubuntu to factory state" with the arrow keys and press Enter. The menu is shown for 30 seconds; if you do nothing, the Hub starts normally.
- When "Gravio Hub X64 auto deployer (24.04)" is shown, press Enter. The internal disk, except the recovery partition, is erased and the OS installation starts. Nothing is erased until you press Enter.
- When the installation is complete, the Hub restarts automatically.
- When the Login prompt appears, you can log in with Username: gravio Password: graviohub. The Web UI becomes available a few minutes after startup.
Note:
- SSH is off after the restore. To use SSH, turn on "Use SSH" in "Gravio Hub Settings" in the Web UI.
- The Hub returns to the OS image stored in the recovery partition (the one it was shipped with, or the one installed by the OS update), and HubKit returns to the version of that image. To update to the latest version, download the latest deb package for Gravio Hub X64 from the gravio.com website (https://www.gravio.com/jp/download ), copy it to the Gravio Hub X64 with scp or a similar tool, and install it over the current version (example:
sudo apt install ./setup_gravio_dockerimage_6.X.XXXX_ghubx64.deb).
2.2 Restore Using the SD Card (Gravio 6.3.x and earlier)
This section explains the procedure to restore a Gravio Hub X64 with an OS image of Gravio 6.3.x or earlier to its factory settings using an SD card.
- Connect a display and keyboard to the Gravio Hub X64.
- Insert the SD card that came with the Gravio Hub X64 box into the SD card slot of the Gravio Hub X64.
- Press the power button on the Gravio Hub X64 to start it.
- When it starts, a single line will appear on the display. In this state, press the Enter key on the keyboard. The OS image will be transferred from the SD card to the internal disk of the Gravio Hub X64.
- When all transfers are complete, the power will automatically turn off.
- Remove the SD card.
- Press the power button again to start.
- When startup is complete, the Login screen will appear. (After this, it will take about 3 minutes for internal initialization, so please leave it powered on.)
- At the Login prompt, log in with Username: gravio Password: graviohub. After login is complete, enter the "sudo docker ps" command to verify the display.
- If 9 lines of Processes are displayed in the Container list, it is operating normally.
- Turn off the power and start again. This completes the initialization process.
This completes the process of restoring the Gravio Hub X64 to its factory settings.