I have two DT-06 boards DT06 datasheet.
The board stock firmware provides Web UI for wifi/network/serial setup. I've replaced the firmware on one board with other sketch; but now I want to revert it to the stock firmware. I cannot find the stock firmware source code anywhere. The DT-06 manufacturer also won't give it out.
Is it possible to extract the stock firmware from another DT-06 board and put it back into the other DT-06 board?