I've tried with 3 different Sd. I installed all the images, both Armbian and Orangepi.
I have an Orange pi pc plus and the tested cards work on it, as well as the power source.
I just haven't tested it with baud rate 115200, but I don't think it helps much.
As I said the pin RX I can measure 3.3v, however the TX is with very low voltage.
I would like measurement indications to make sure the card is functional or not.