pypilot reads ~/.pypilot/pypilot.conf for initial settings.   This file should not be edited while pypilot is running since it will be overwritten when pypilot is stopped.

~/.pypilot/serial_ports  -- This is a list of devices pypilot is allowed to use.   If the file does not exist, pypilot will try to use any serial port
~/.pypilot/blacklist_serial_ports -- This optional file is a list of devices pypilot may not use


pypilot or pypilot/autopilot.py can be run directly from the command line for the best debugging control.  In this case the output log will be on the console, and it can be stopped from Ctrl-c


If pypilot is run as a service the output log can be retrieved via journalctl.   Under tinypilot, the logs are located in /var/log

<code>
pi@openplotter:~/pypilot/pypilot $ python autopilot.py
loading servo calibration /home/pi/.pypilot/servocalibration
WARNING: using default servo calibration!!
connected to gpsd
warning: failed to open special file /dev/watchdog0 for writing
         cannot stroke the watchdog
Settings file RTIMULib.ini loaded
Using settings file RTIMULib.ini
Detected MPU9250/MPU9255 at standard address
Using fusion algorithm Kalman STATE4
IMU Name: MPU-925x
min/max compass calibration not in use
Using ellipsoid compass calibration
Using accel calibration
gpsd is using device /dev/ttyOP_moit
MPU-925x init complete
sensors is running too _slowly_ 0.250969171524
arduino servo found on [u'/dev/ttyAMA0', 38400]
serialprobe success: /home/pi/.pypilot/servodevice [u'/dev/ttyAMA0', 38400]
found gps on gpsd /dev/ttyOP_moit
nmea ready for connections
listening on port 20220 for nmea connections
new nmea device (u'/dev/serial/by-id/usb-1a86_USB2.0-Serial-if00-port0', 38400)
serialprobe success: /home/pi/.pypilot/nmea0device (u'/dev/serial/by-id/usb-1a86_USB2.0-Serial-if00-port0', 38400)
found wind on serial AR/dev/serial/by-id/usb-1a86_USB2.0-Serial-if00-port0
</code>

Once started, additional messages are typically errors or warnings of some kind.