Thank you for the suggestion. Is there any chance that also this one will work? It's cheaper, but I don't know which pins I am supposed to connect, since there is both a VCC pin and voltage level (?) pins (on the bottom side).
Thank you for your reply.
Isn't the official one a bit overpriced (~30$)? I found this alternative, but I don't know if it will indeed work and which pins to connect. (If you wan to help, please read my other comment below. Thank you!).
EDIT: Nevermind, solved (see /u/OrYouCouldJustNot's comment below)
I found this other converter that supports 1.8V, however I am not sure how I shall connect it to the board.
Shall I just connect GND, RXD and TXD? What about the VCC pin, and voltage pins in the bottom left corner of the converter? I am looking specifically at this image: link.
EDIT: Nevermind, solved (see /u/OrYouCouldJustNot's comment below)