Fermion Serial Data Logger
Oddy 2026-09-17 20:58:49 49 Views1 Replies Hello!
I have a problem with the Fermion Serial Data Logger v.2.0. The issue is that it does not create a .ini configuration file on any of the SD cards I tested. I checked 32 GB cards from Adata, Kingston, and Perfeo. None of them work; all were previously formatted to FAT32 according to the instructions.
What could be the problem, or is it a hardware issue with the module?
When connected to a PC, the module always reports that there is no disk, even though the capacity of the cards is detected correctly.
The module won't create CONFIG.TXT if it's powered from USB. It only generates the file when powered through the UART pins (VCC/GND) for more than 2 seconds — that's data storage mode. USB power puts it into flash drive mode, which skips the auto-create step.
For the "no disk" issue — the product page notes SD card compatibility isn't guaranteed across all brands. The module sees the capacity but can't mount the filesystem, which points to a formatting or compatibility problem. Try the diskpart full format (clean → convert mbr → create partition primary → format fs=fat32 quick) rather than a quick GUI format.
If the card still won't mount after a proper MBR/FAT32 format, the Adata/Kingston/Perfeo cards may simply not play nice with this module. The wiki FAQ has a thread on this exact issue.
Jason.Miao 