software:datalogger
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software:datalogger [2013/05/31 11:03] – bokal | software:datalogger [2016/05/19 09:19] (current) – external edit 127.0.0.1 | ||
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- | === Data logging with mongodb === | + | ===== Data logging with mongodb |
There is a tool for loggin data into mongodb for later processing. The data is fetched from selected topics or all topics when running a ROS process. The logging tool is from the package **mongodb_log**. | There is a tool for loggin data into mongodb for later processing. The data is fetched from selected topics or all topics when running a ROS process. The logging tool is from the package **mongodb_log**. | ||
- | == Installing | + | ==== Installing |
- | Using a properly set up ros environment, | + | Using a properly set up ros environment |
- | * Install **roslua** | + | * Install **roslua** |
+ | rosws set roslua --git https:// | ||
+ | rosws update roslua | ||
+ | # source bashrc/ | ||
+ | roscd roslua | ||
+ | # install | ||
+ | rosmake roslua | ||
+ | |||
+ | * Install **mongodb** package from ROS as shown below | ||
+ | rosws set warehouse-hg --hg http:// | ||
+ | rosws update warehouse-hg | ||
+ | # source bashrc/ | ||
+ | # install dependencies (scons and v8) as given below | ||
+ | sudo apt-get install scons | ||
+ | sudo apt-get install libv8-dev | ||
+ | rosmake mongodb | ||
+ | | ||
* Install the mongodb logger package; | * Install the mongodb logger package; | ||
- | rosws set ros_mongodb_log | + | rosws set mongodb_log |
rosws update | rosws update | ||
- | # source | + | # source |
- | | + | |
- | | + | |
- | + | | |
- | == Logging with mongodb_log == | + | ==== Logging with mongodb_log |
Run the logger node | Run the logger node | ||
- | rosrun | + | rosrun |
# use the tool mongodb_rdd to check | # use the tool mongodb_rdd to check | ||
- | == Querying the log database == | + | ==== Querying the log database |
The data from the database can be retrieved using any of the mongo clients APIs. For cram, the cl-mongo client is recommended but there are clients for any popular language around like Python, C++ etc. For mython, the pymongo client has already been wrapped in ROS here [[http:// | The data from the database can be retrieved using any of the mongo clients APIs. For cram, the cl-mongo client is recommended but there are clients for any popular language around like Python, C++ etc. For mython, the pymongo client has already been wrapped in ROS here [[http:// | ||
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rosws update ros_cl_mongo | rosws update ros_cl_mongo | ||
# source bashrc | # source bashrc | ||
+ | rosmake ros_cl_mongo # may take some time | ||
+ | | ||
+ | The use it from the standard emacs REPL environment as follows; | ||
+ | rosrun roslisp_repl repl | ||
+ | # Now load the ros-cl-mongo package and interact with the database using it | ||
+ | | ||
+ | Further usage instructions on cl-mongo are available at [[https:// | ||
+ | ==== Locating the Database ==== | ||
+ | The database is by default located in ''/ | ||
+ | * Hostname : localhost (by default) | ||
+ | * Port: 27017 (default) | ||
+ | * Locatation: ''/ | ||
+ | |||
+ | |||
+ | ==== Examples of usage ==== | ||
+ | We have compiled simple example of logging with this tool and querying the data using either lisp or python. The examples are in the links below: | ||
+ | * [[: | ||
software/datalogger.1369998184.txt.gz · Last modified: 2016/05/19 09:18 (external edit)