SIYI N7 - Logs

N7 Autopilot User Manual (ArduPilot) v1.0
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4.7 Logs
There are two ways to record your flight data. With some exceptions, the two
methods record very similar data but in different ways:
1. Dataflash logs are recorded on the autopilot (often to the SD card) so they must
be downloaded from the autopilot after a flight.
2. Telemetry logs (also known as “Tlogs”) are recorded by the ground station (i.e.,
Mission Planner) on the local PC when the autopilot is connected via a telemetry
link.
Common Parameters for Flight Logs
LOG_BACKEND_TYPE: AP_Logger Backend Storage type
Bitmap of what Logger backend types to enable. Block-based logging is available on SITL and
boards with dataflash chips. Multiple backends can be selected.
LOG_BITMASK: Log bitmask
Bitmap of what on-board log types to enable. This value is made up of the sum of each of the log
types you want to be saved. It is usually best just to enable all basiclog types by setting this to
65535.
LOG_DISARMED: Enable logging while disarmed.
If LOG_DISARMED is set to 1 then logging will be always enabled including when disarmed.
Logging before arming can make for very large logfiles but can help a lot when tracking down
startup issues and is necessary if logging of EKF replay data is selected via the LOG_REPLAY
parameter. If LOG_DISARMED is set to 2, then logging will be enabled when disarmed, but not if
a USB connection is detected. This can be used to prevent unwanted data logs being generated
when the vehicle is connected via USB for log downloading or parameter changes. If
LOG_DISARMED is set to 3 then logging will happen while disarmed, but if the vehicle never
arms then the logs using the filesystem backend will be discarded on the next boot.
LOG_FILE_DSRMROT: Stop logging to current file on disarm.
When set, the current log file is closed when the vehicle is disarmed. If LOG_DISARMED is set,
then a fresh log will be opened. Applies to the File and Block logging backends.
LOG_FILE_MB_FREE: Old logs on the SD card will be deleted to maintain this amount of
free space.