From time to time the Signal Owl may be updated with new firmware to add features and security improvements. It is highly recommended that you keep your Signal Owl up-to-date with the latest firmware, available here.
To install the latest firmware:
- Download the latest firmware upgrade file. Make sure the filename is upgrade-version.bin (where version is the firmware version, e.g., upgrade-1.0.0.bin) and that the SHA-256 checksum matches.
- Copy the firmware upgrade file to the root of an EXT4 or FAT32 formatted USB flash drive. Do not rename, unpack or otherwise modify this file.
- Plug the USB drive into the powered-off Signal Owl.
- Power on the Signal Owl from a reliable USB power source. When the device enters SELECT mode, press the device button once. The upgrade process may take up to 5-10 minutes and will be indicated by a series of LED patterns. Do not power-off or disturb the device until the upgrade process is complete.
During the upgrade process, the red LED will indicate the following states:
- Red blinking – booting
- Red solid >> red fast blinking – entering SELECT mode
- Red double blinking – beginning upgrade process
- Red solid – upgrade in progress
- Red blinking – rebooting
- Red solid >> red fast blinking – entering SELECT mode
- Red double blinking – upgrade complete, ARMING mode ready