Troubleshooting

App Cannot Access nBox-Tool

Since the app needs to access a local address (192.168…) to read measurement values from the hardware, the app must have permission to access the local network.

For this, iOS displays a popup for the corresponding permission when the app is first used. If this permission is not granted at that point, or is later removed, the measurement hardware cannot be accessed.

The app then displays the following error message: “The measurement hardware could not be reached. Please check whether the app has permission to access the local network.”

This permission can also be granted later in the settings (Settings > Privacy & Security > Local Network)

Corresponding documentation from Apple: https://support.apple.com/en-us/102229

No Network Packets During Full PLC Check

If the nBox-Tool cannot receive any packets on the FCC frequency band, this may be because the notching is not configured correctly.

Notching intentionally leaves certain frequencies of the FCC band unused, as these sub-bands are reserved for other purposes.

Notching can be configured in the nBox-Tool web interface under the menu nBox-Config > Sniffer, and must exactly match the notching used in your network for packets to be received.

If your network uses both FCC notched and FCC unnotched areas, the app offers a switch for quick switching: (optionally activatable via configuration)