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Firmware Updates
The FH-2's firmware can be updated using a USB flash drive, which must be formatted as 'FAT'
(variously referred to as 'MS-DOS FAT', 'FAT16', 'FAT32'). The process is as follows:
•
Download the firmware from the Expert Sleepers website.
•
Unzip the download.
•
Copy the file 'image.hex' from the unzipped download to the root folder of the USB flash
drive.
•
Insert the drive into the FH-2's USB A socket.
◦
You are advised to observe basic ESD (electrostatic discharge) precautions
- see for
example
here
16
. Don't be wearing a nylon sweater in an air conditioned room.
•
Restart the FH-2 with the encoder knob pressed. (You can do this by power cycling it, or by
rebooting from the Misc menu.) It will go through the first stage of its startup sequence,
showing the bootloader version number.
•
Keep the knob pressed until the message "Press left button to begin flashing..." is shown.
◦
If at this point the FH-2 shows the message "Could not find the file 'image.hex' on the
drive", no firmware file could be found on the drive. Remove the drive and check its
contents and formatting.
◦
If the FH-2 stalls on the message “Attempting to mount drive...” the drive is not
formatted correctly.
•
Press the left button to begin the flashing process. (If you change your mind and don't want
to proceed, simply turn the power off.)
•
When the flashing process starts, the display updates to indicate progress. Do not remove the
drive or turn off the power during the update.
•
When the flashing process is complete, the FH-2 will show the message "Success" if
successful, or "Error:" plus an error code if there was a problem.
•
Press the left button to reboot the FH-2 and resume normal operation.
16 http://www.computerhope.com/esd.htm
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