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© Sealevel Systems, Inc.
SeaI/O | SL9049 11/2021
The first thing the SeaI/O unit will do is to erase all of its flash memory (with the exception of a small loader for
the firmware). It will then start flashing all three lights rapidly indicating it requires downloading. Once the
download starts, one light will flash as data is downloaded. Once the download is complete, the green light will
remain on. At this point, simply unplug power to the unit and when power is re-applied, you should be operational
with the new software.
In the event something about the download failed, the red light should stay on. In this case, simply power down
the unit and power it back up. It should now be flashing all three lights rapidly. Simply perform the SeaIOcu
command as described above.
The above should only be performed if you (1) really feel the update is required and (2) you feel confident
in your ability to perform the update. Once the firmware has been erased, you must either be able to re-
program it locally or send it back to SeaLevel Systems, Inc. for reprogramming.