Dear all,

I have a done development from 3 years ago. Havng to restructure something, I wanted to programm my TLSR8266 via the C1T42A20 EVK daugtherboard as I did before.

After some few steps, the daughterboard was no more recognized by MS Win11 as USB decive.
Same with a second daughterboard.

I can not directly work with this boards anymore and so, I do not have a chance to programm my devices.

At this point I tried to press the button on the daughterboard while  attaching it to the pc.
With this procedure the device is recognized as USB printer and I can access it with for example wtcdb.

So I think, I'm in a kind of bootloader that way. 
And I think I have damaged the standard firmware for normal booting and programming.

If this is correct: 
1) Where can I find the original firmware for using the EVK daugtherboard 
2) How can I burn it, to have my evk daughter boards working normally again

Any help or ideas appreciated. Thank you.

Regards,
  Frank