ROS node to compare and report (as diagnostics) the status of time synchonization in a ROS environment.
- topic: Topic with time reference from master
- mode: Defines node operation. Server: Node publishes its own walltime on topic indicated by the parameter above; Client: Node gets time reference from topic and compares it to its own time, up to a certain tolerance.
- tolerance: Threshold where clocks are considered to be synchronized