Recovery from Firmware Upgrade Failure

1. Introduction
This document is intended to provide first line help in the recovery from a firmware upgrade failure or other issue which has resulted in the IP address reverting to the fallback IP address.

The specific fallback IP address will depend on the model of the unit. To identify the correct one, please refer to the following guide:

https://support.oxts.com/hc/en-us/articles/115002409189-Blink-mode-recovery

2. Problem
No communication is possible with the unit at its usual IP address (by default this is 195.0.0.xx, where xx represents the last two digits of the serial number), so no data is received by NAVdisplay and FTP connections will not work.  However, the unit will respond to a ping request to the fallback IP address.

The LED's will be flashing red or green alternately (blink mode). When in this state the unit will reset every 2 minutes.

3. Reason
This failure is most likely to have been caused by an interruption during the process of installing the firmware, or by the fact that the firmware was sent in an ASCII format not binary. In these cases, the firmware cannot run and the unit has defaulted to the fallback IP address, from which it can be recovered by installing the relevant firmware file.

4. Instructions for Recovery
Before continuing with this process, OxTS Support with details of your product including its serial number, to request a copy of the firmware file.

You will need to be ready with the firmware file relevant to your unit. If you do not have it, please contact your local agent or OxTS Support with your unit's model and serial number.

Once you have the file, ensure that the IP address of your PC begins 195.0.0. and ends with a number less than 254 that is not the same as the fallback IP addres, then connect the Ethernet port of your PC to the unit and follow the process below:

4.1. Using Windows Explorer or a web browser

You have 2 minutes during the unit's automatic reset cycle to do the following:

1) Once your PC is connected to the unit, click the Windows (Start) button and type the following command in lower case:

ftp://fallbackIP

or if that does not work,

ftp://user:user@fallbackIP

2) Copy the firmware file to the window that opens, then close the window on completion.
3) Toggle the unit off / on or wait the 2 minutes for it to reset itself.
4) It should now have the original IP address, so if this is not in the 195.0.0.xxx subnet, you will have to change the IP address of your PC to the correct subnet.
5) Run NAVconfig and commit default settings to the unit.
6) Open NAVdisplay - check that the correct IP address and firmware ID appears in NAVconnect.

4.2. Using a proprietary ftp solution (Such as FileZilla)

You have 2 minutes during the unit's automatic reset cycle to do the following:

1) Ensure that file transfer will be in binary mode, not ASCII. By default, FileZilla transfers files without extension (like 'rtbns') as ASCII, so you should change the setting, as shown below.

2) Once your PC is connected to the unit, go to the ‘user’ folder on the fallback IP (if prompted for username and password they are User: user and Password: user (all lowercase)) and send the file over in binary format, not ASCII. Wait for the transfer to complete, then disconnect FTP software.
3) Toggle the unit off / on or wait the 2 minutes for it to reset itself.
4) It should now have the original IP address, so if this is not in the 195.0.0.xxx subnet, you will have to change the IP address of your PC to the correct subnet.
5) Run NAVconfig and commit default settings.
6) Open NAVdisplay - check that the correct IP address and firmware ID appears in NAVconnect.