The ROS Master and Slave APIs manage information about the availability of topics and services for ROS, as well as the negotiation of connection transport. They are implemented using XML-RPC and come in a variety of language implementations.

API Listings

• Master API

• Parameter Server API

• Slave API

Return value format

Return values are lists in the format: [statusCode, statusMessage, value]

• statusCode (int): An integer indicating the completion condition of the method. Current values:
  • -1: ERROR: Error on the part of the caller, e.g. an invalid parameter. In general, this means that the master/slave did not attempt to execute the action.
  • 0: FAILURE: Method failed to complete correctly. In general, this means that the master/slave attempted the action and failed, and there may have been side-effects as a result.
  • 1: SUCCESS: Method completed successfully.
  • Individual methods may assign additional meaning/semantics to statusCode.
• statusMessage (str): a human-readable string describing the return status
• value (anytype): return value is further defined by individual API calls.