The log blocks tab shows all saved log configurations and lets you start/stop them and write their data to file.
- Fields
- ID: Block ID on the Crazyflie
- Name: Block name in the client
- Period (ms): How often data is sent back to the client, in milliseconds
- Start: Checked if the block is running. Click to start or stop it. Note that some blocks drive the user interface — stopping them will cause parts of the UI to stop updating.
- Write to file: Checked if data is being written to file. Click to start or stop writing.
- Contents: The variables in the block, listed as
group.name
- Each log block can be expanded to show its individual variables.
The data is written to the logdata folder in the client configuration directory
(find it via Settings / Open config folder). Files are organized into a
subdirectory per connection session, named by the connection timestamp.
Each file is named {block_name}-{timestamp}.csv. Starting and stopping file
writing multiple times within one session produces separate files.
The CSV format has a header row followed by one row per sample. The timestamp column shows milliseconds since the Crazyflie was powered on.
Example data logged when logging the battery level:
Timestamp,pm.vbat
9103,3.74252200127
10103,3.74252200127
11103,3.74252200127
12103,3.74252200127
13103,3.74252200127