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SMACH, which stands for 'state machine', is a task-level
architecture for rapidly creating complex robot behavior. At its
core, SMACH is a ROS-independent Python library to build
hierarchical state machines. SMACH is a new library that takes
advantage of very old concepts in order to quickly create robust
robot behavior with maintainable and modular code.
SMACH, which stands for 'state machine', is a task-level
architecture for rapidly creating complex robot behavior. At its
core, SMACH is a ROS-independent Python library to build
hierarchical state machines. SMACH is a new library that takes
advantage of very old concepts in order to quickly create robust
robot behavior with maintainable and modular code.
SMACH, which stands for 'state machine', is a task-level
architecture for rapidly creating complex robot behavior. At its
core, SMACH is a ROS-independent Python library to build
hierarchical state machines. SMACH is a new library that takes
advantage of very old concepts in order to quickly create robust
robot behavior with maintainable and modular code.
SMACH is a task-level architecture for rapidly creating complex robot
behavior. At its core, SMACH is a ROS-independent Python library to build
hierarchical state machines. SMACH is a new library that takes advantage of
very old concepts in order to quickly create robust robot behavior with
maintainable and modular code.
SMACH is a task-level architecture for rapidly creating complex robot
behavior. At its core, SMACH is a ROS-independent Python library to build
hierarchical state machines. SMACH is a new library that takes advantage of
very old concepts in order to quickly create robust robot behavior with
maintainable and modular code.
SMACH is a task-level architecture for rapidly creating complex robot
behavior. At its core, SMACH is a ROS-independent Python library to build
hierarchical state machines. SMACH is a new library that takes advantage of
very old concepts in order to quickly create robust robot behavior with
maintainable and modular code.
Maintainer status: maintained
Maintainer: Isaac I. Y. Saito <gm130s AT gmail DOT com>
SMACH is a task-level architecture for rapidly creating complex robot
behavior. At its core, SMACH is a ROS-independent Python library to build
hierarchical state machines. SMACH is a new library that takes advantage of
very old concepts in order to quickly create robust robot behavior with
maintainable and modular code.
Maintainer status: maintained
Maintainer: Isaac I. Y. Saito <gm130s AT gmail DOT com>
SMACH is a task-level architecture for rapidly creating complex robot
behavior. At its core, SMACH is a ROS-independent Python library to build
hierarchical state machines. SMACH is a new library that takes advantage of
very old concepts in order to quickly create robust robot behavior with
maintainable and modular code.
Maintainer status: maintained
Maintainer: Isaac I. Y. Saito <gm130s AT gmail DOT com>
SMACH is a task-level architecture for rapidly creating complex robot
behavior. At its core, SMACH is a ROS-independent Python library to build
hierarchical state machines. SMACH is a new library that takes advantage of
very old concepts in order to quickly create robust robot behavior with
maintainable and modular code.
Maintainer status: maintained
Maintainer: Isaac I. Y. Saito <gm130s AT gmail DOT com>
SMACH is a task-level architecture for rapidly creating complex robot
behavior. At its core, SMACH is a ROS-independent Python library to build
hierarchical state machines. SMACH is a new library that takes advantage of
very old concepts in order to quickly create robust robot behavior with
maintainable and modular code.
Maintainer status: maintained
Maintainer: Isaac I. Y. Saito <gm130s AT gmail DOT com>
SMACH is a task-level architecture for rapidly creating complex robot
behavior. At its core, SMACH is a ROS-independent Python library to build
hierarchical state machines. SMACH is a new library that takes advantage of
very old concepts in order to quickly create robust robot behavior with
maintainable and modular code.
Maintainer status: maintained
Maintainer: Isaac I. Y. Saito <gm130s AT gmail DOT com>
SMACH is useful when you want a robot to execute some complex plan, where all possible states and state transitions can be described explicitly. This basically takes the hacking out of hacking together different modules to make systems like mobile robotic manipulators do interesting things.
Fast prototyping: The straightforward Python-based SMACH syntax makes it easy to quickly prototype a state machine and start running it.
Complex state machines: SMACH allows you to design, maintain and debug large, complex hierarchical state machines. You can find an example of a complex hierarchical state machine here.
Introspection: SMACH gives you full introspection in your state machines, state transitions, data flow, etc. See the smach_viewer for more details.
When should I NOT use SMACH?
Unstructured tasks: SMACH will fall short as the scheduling of your task becomes less structured.
Low-level systems: SMACH is not meant to be used as a state machine for low-level systems that require high efficiency, SMACH is a task-level architecture.
Smash: Do not use SMACH when you want to smash something, for that use smash.
Is SMACH only a finite state machine library?
You can build a finite state machine using SMACH, but SMACH can do much more. SMACH is a library for task-level execution and coordination, and provides several types of "state containers". One such container, is a finite state machine, but this container can also be a state in another container. See the tutorials page for a list of containers and states built into SMACH.
Documentation
The documentation page provides an overview of the concepts used in SMACH.
The tutorials page contains an extensive set of tutorials to get you up to speed building and running your own state machines.
