Shouldn’t RX and TX be crossed? So TX → RX and vice versa?
Also, what is the voltage of the VCC pin on your TTL adapter? To be sure you could connect it to 3.3v instead of VCC.
I have the same USB stick, and I tied flashing it yesterday. Couldn’t get it to programming mode.
same as the picture above, except I connected it to the 3.3 Volt. Tried RX-RX + TX-TX and RX-TX + TX-RX combinations, but alas.
Something that came to me later,do we need to power the board ?.
Yes
I feel so stupid now.