Hi,
I'm using a NanoVNA H4 (H/W version 4.2.1) that came with a card reader already built in.
Current firmware is DiSlord's excellent V 1.1.00
I'm now trying to use the SD card (Lexar 633x microSDHC UHS-1 95MB/s 16GB) but get write errors when trying to save S1/S2 files and
saving screenshots.
Connected to my PC running NanoVNA App and issuing a "sd_list *.*" command, I get an error message saying "rx: err: no card".
I checked that there is 3.3v going to the card reader, and that ground is connected, but still no joy.
The card is fitted the correct way and locked into position, card contacts are clean (new card anyway), and no shorts between the card reader tracks on the PC board.
Any suggestions?
