# Upgrading EHMI Software

The software installed on the EHMI can be updated using a USB storage device.

Upgrade Requirements

- USB storage device

- Cable with female USB type-A on one end, and male Micro-B on the other end (alternatively, a USB device with 2 connectors, male type-A and male micro-B, can also be used)

- Version number of the currently installed EHMI firmware. To view the version number, go to Information in the main menu and select Software version.

Upgrading Procedure

1. In a web browser, go to the Marketing & Support Portal > Software Center > Accessories. Download the updated software (application and/or GUI data) in the category EHMI.

   Some application updates require also the GUI data to be updated. If the version of the GUI data is incorrect an error message will be displayed at restart. The GUI data will never require update as long as the application is not updated.

   Filename | Software type | Description
   --- | --- | ---
   eHMI_STR_x.x.x.fbk | Application software STR EHMI and ITB EHMI | This is usually the only software that needs to be updated for the tool.
   guidata-x.x.x.fbk | GUIDATA | Graphic data for all characters. Usually does not require upgrading.

2. Store the downloaded files on the root of the empty USB storage device.

3. Enter the EHMI update menu, using one of methods described below.

   Method 1

   - Disconnect the battery from the tool and wait for the backup battery to discharge.

   - Press and hold the Select button while attaching the battery again. Continue to hold the Select button until the Update menu is shown.

   Method 2

   - Navigate to the Information menu.

   - Press and hold the Down button, while pressing the Up button twice to enter the hidden submenu.

   - In the submenu, navigate to Reset, and press and hold the Select button until the Update menu is shown.

4. Using a 5 mm Allen key, remove the lid covering the USB port on the EHMI. Connect the USB storage device to the EHMI USB port.

5. Using the Up- and Down buttons, navigate to the update file, and press the Select button to start the update process.

6. When updating is complete, press the Up button to reboot the system.