I was setting up mangOH Yellow WP7702 and tried to connect to the mangOH yellow using the command ssh root@192.168.2.2 on my terminal emulator.
I get the error:
Permission denied (Public Key).
When I was setting up my CF3 module for the first time, I chose option 1: Setup ssh keys and disable passwords-based authentication via ssh (the most secure) instead of option 3: Do Nothing. Connect_to_mangOH_Yellow00018|591x78
you can use 7zip tool to extract the exe.
Inside there is .spk file, transfer it to module /tmp folder by scp or USB thumb drive or download from network, and then you can use “fwupdate download /tmp/xxx.spk” command to update FW.
Besides, from your log, there is no download port.
You can also try AT!BOOTHOLD command to switch module to download mode.
Then you can try the exe again.
If it still not works, you can open command prompt, type “fdt2.exe xxx.spk” and see if it works.
Lastly, what is the current FW version on your module?
If it is on some FW older than R11, then you can directly use the swiflash to erase the userapp partition.