This tool allows you to flash firmware into a Sercomm router after it was put into download mode, e.g. if the original firmware was destroyed. It runs under Linux only, you must be root to execute it.

1. Compile

make

2. Enter Download Mode

1. Power off the device
2. Press the RESET or WPS button (this depends on the router model)
3. Power on while holding the button
4. Wait 5 seconds or more until the LEDs blink in a special pattern depending on the router model.

If TTL console is connected, it will look like: DEBUG_INF:=================================================== DEBUG_INF:Sercomm Upgrade(Module Ver 2.06.01.11) Start! DEBUG_INF:===================================================

3. Run the Tool

Connect a LAN port to a NIC of the host, e.g. to eth1.

3.1. Probe the Device

./sercomm-recovery -i eth1

This should list some info about all device found in download mode.

3.1a. Specify device mac address to omit discovery (if discovery fails)

./sercomm-recovery -i eth1 -d XX:XX:XX:XX:XX:XX

3.1b. AND/OR change device mac address (optional, if it shows invalid or empty mac)

./sercomm-recovery -i eth1 -d XX:XX:XX:XX:XX:XX -m XX:XX:XX:XX:XX:XX

3.2. Flash

./sercomm-recovery -i eth1 -f flash_burn.bin

This probes for devices in download mode. If more than one found, it prompts for the one to flash. A reboot is executed afterwards.

Warning! Some devices expect firmware with bootloader part or firmware without vendor headers.

4. Troubleshooting

If anything goes wrong with probing or flashing, please execute the command again with "-v", e.g:

./sercomm-recovery -v -i eth1 -f flash_burn.bin

This adds a lot of debug output to stdout.

5. Status

In development, works with varoius Sercomm routers.