Why no dataflash logs?

Hardware Vendors CubePilot/ProfiCNC/HEX
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1

I have a Cube Orange with Arduplane 4.0.9. The SD card installed is the 16 GB card that came with the Cube.

For some reason, dataflash logging isn’t happening. I have tried swapping out the SD card, and I have tried messing with the LOGGER_BACKEND_TYPE parameter (I have tried setting to it 1, 4, and 6). I have tried enabling logging while disarmed. All to no avail.

Board voltage is around 5.2.

Two questions:

  1. What do the three different logger backend types actually mean? I can’t find any online doc that explains the choices. I have been assuming that the block type would be the correct one for writing a .bin file to the SD card, but that’s just a guess. I have no idea what “file” or “MAVlink” backends mean.

  2. What else can I try to get logging to work?

Additional info: At some point a year or so ago, some log files were in fact created – I could see them via the MP “dataflash logs” interface. But attempts to delete them via that interface silently failed. I ended up deleting them manually by plugging the SD card into my computer. But since then, no new logs. But even then, the logs present were quite old, so I don’t think the problem started at that point.

2

The backends are:

  • Mavlink: Stream logfile over MAVLink (usually to a connected companion computer. Requires a fast serial baud rate)
  • Dataflash: Log to on-board flash chip, if available
  • File: Log to SD card, if available.

In your case, you want “file logging”

1 Like
3

Thank you. Is this information anywhere in the online docs? If so, where can I find it for future reference?

Despite having tried the “file” option, I still wasn’t getting any logs, so something else must still be wrong with my setup.

4

Make sure the SD card is formatted as FAT or FAT32, not EXFAT. Most 32GB and bigger SD cards are formatted as EXFAT from the factory.