Data logging
[Tutorials]

Logging sensor data to files and playing it back. More...

Modules

 laser format
 

laser log format


 position2d format
 

position2d log format


 ptz format
 

PTZ log format The format for each wsn message is:

  • pan (float): The pan angle/value
  • tilt (float): The tilt angle/value
  • zoom (float): The zoom factor
  • panspeed (float): The current panning speed
  • tiltspeed (float): The current tilting speed.

 sonar format
 

sonar log format


 WiFi format
 

wifi log format


 WSN format
 

WSN log format.



Detailed Description

Logging sensor data to files and playing it back.

Two player drivers support data logging and playback: readlog and writelog. See the docs for those drivers for details on usage.

Player log files have a simple text format. Messages are new-line separated, and any line beginning with a '#' is ignored. Every message line starts with common meta-data:

time host robot interface index type subtype

The fields are:

Following this common meta-data is the message payload, the format of which will depend on the interface, type, and subtype. See the "Modules" section below for links to interface-specific message formats.

By convention, configuration response messages such as geometry information are put at the beginning of the logfile. The writelog driver will try to get geometry and log it at the beginning of the file, and the readlog driver will read in configuration response messages from the file until a data message is encountered.


Last updated 12 September 2005 21:38:45