..
 #############################################################
 # This file was automatically generated on 2015-05-08.      #
 #                                                           #
 # If you have a bugfix for this file and want to commit it, #
 # please fix the bug in the generator. You can find a link  #
 # to the generators git repository on tinkerforge.com       #
 #############################################################


:breadcrumbs: <a href="../../index.html">Home</a> / <a href="../../index.html#software-shell">Software</a> / Shell - Rotary Poti Bricklet

.. |device_identifier_constant| unicode:: 0xA0
   :trim:

.. _rotary_poti_bricklet_shell:

Shell - Rotary Poti Bricklet
============================

This is the description of the :ref:`Shell API bindings <api_bindings_shell>` for the :ref:`Rotary Poti Bricklet <rotary_poti_bricklet>`. General information and technical
specifications for the Rotary Poti Bricklet are summarized in its :ref:`hardware description
<rotary_poti_bricklet_description>`.

An :ref:`installation guide <api_bindings_shell_install>` for the Shell API
bindings is part of their general description.

.. _rotary_poti_bricklet_shell_examples:


Examples
--------

The example code below is `Public Domain (CC0 1.0)
<http://creativecommons.org/publicdomain/zero/1.0/>`__.

Simple
^^^^^^

`Download (example-simple.sh) <https://github.com/Tinkerforge/rotary-poti-bricklet/raw/master/software/examples/shell/example-simple.sh>`__

.. literalinclude:: RotaryPoti_Bricklet_Shell_example-simple.sh
 :language: bash
 :linenos:
 :tab-width: 4

Callback
^^^^^^^^

`Download (example-callback.sh) <https://github.com/Tinkerforge/rotary-poti-bricklet/raw/master/software/examples/shell/example-callback.sh>`__

.. literalinclude:: RotaryPoti_Bricklet_Shell_example-callback.sh
 :language: bash
 :linenos:
 :tab-width: 4

.. _rotary_poti_bricklet_shell_api:

API
---

Possible exit codes for all ``tinkerforge`` commands are:

* 1: interrupted (ctrl+c)
* 2: syntax error
* 21: Python 2.5 or newer is required
* 22: Python ``argparse`` module is missing
* 23: socket error
* 24: other exception
* 25: invalid placeholder in format string
* 26: authentication error
* 201: timeout occurred
* 209: invalid argument value
* 210: function is not supported
* 211: unknown error



Command Structure
^^^^^^^^^^^^^^^^^

The common options of the ``call`` and ``dispatch`` commands are documented
:ref:`here <ipcon_shell_api>`. The specific command structure is shown below.

.. sh:function:: X Stinkerforge Pcall Nrotary-poti-bricklet A[<option>..] L<uid> L<function> L[<argument>..]

 :param <uid>: string
 :param <function>: string

 The ``call`` command is used to call a function of the Rotary Poti Bricklet. It can take several
 options:

 * ``--help`` shows help for the specific ``call`` command and exits
 * ``--list-functions`` shows a list of known functions of the Rotary Poti Bricklet and exits


.. sh:function:: X Stinkerforge Pdispatch Nrotary-poti-bricklet A[<option>..] L<uid> L<callback>

 :param <uid>: string
 :param <callback>: string

 The ``dispatch`` command is used to dispatch a callback of the Rotary Poti Bricklet. It can
 take several options:

 * ``--help`` shows help for the specific ``dispatch`` command and exits
 * ``--list-callbacks`` shows a list of known callbacks of the Rotary Poti Bricklet and exits


.. sh:function:: X Stinkerforge Scall Protary-poti-bricklet L<uid> N<function> A[<option>..] L[<argument>..]

 :param <uid>: string
 :param <function>: string

 The ``<function>`` to be called can take different options depending of its
 kind. All functions can take the following options:

 * ``--help`` shows help for the specific function and exits

 Getter functions can take the following options:

 * ``--execute <command>`` shell command line to execute for each incoming
   response (see section about :ref:`output formatting <ipcon_shell_output>`
   for details)

 Setter functions can take the following options:

 * ``--expect-response`` requests response and waits for it

 The ``--expect-response`` option for setter functions allows to detect
 timeouts and other error conditions calls of setters as well. The device will
 then send a response for this purpose. If this option is not given for a
 setter function then no response is send and errors are silently ignored,
 because they cannot be detected.


.. sh:function:: X Stinkerforge Sdispatch Protary-poti-bricklet L<uid> N<callback> A[<option>..]

 :param <uid>: string
 :param <callback>: string

 The ``<callback>`` to be dispatched can take several options:

 * ``--help`` shows help for the specific callback and exits
 * ``--execute <command>`` shell command line to execute for each incoming
   response (see section about :ref:`output formatting <ipcon_shell_output>`
   for details)



Basic Functions
^^^^^^^^^^^^^^^



.. sh:function:: tinkerforge call rotary-poti-bricklet <uid> get-position  


 :returns position: int

 Returns the position of the Rotary Potentiometer. The value is in degree 
 and between -150° (turned left) and 150° (turned right).
 
 If you want to get the position periodically, it is recommended to use the
 callback :sh:func:`position <rotary-poti-bricklet position>` and set the period with 
 :sh:func:`set-position-callback-period <rotary-poti-bricklet set-position-callback-period>`.
 


Advanced Functions
^^^^^^^^^^^^^^^^^^

.. sh:function:: tinkerforge call rotary-poti-bricklet <uid> get-analog-value  


 :returns value: int

 Returns the value as read by a 12-bit analog-to-digital converter.
 The value is between 0 and 4095.
 
 .. note::
  The value returned by :sh:func:`get-position <rotary-poti-bricklet get-position>` is averaged over several samples
  to yield less noise, while :sh:func:`get-analog-value <rotary-poti-bricklet get-analog-value>` gives back raw
  unfiltered analog values. The only reason to use :sh:func:`get-analog-value <rotary-poti-bricklet get-analog-value>` is,
  if you need the full resolution of the analog-to-digital converter.
 
 If you want the analog value periodically, it is recommended to use the 
 callback :sh:func:`analog-value <rotary-poti-bricklet analog-value>` and set the period with 
 :sh:func:`set-analog-value-callback-period <rotary-poti-bricklet set-analog-value-callback-period>`.
 
.. sh:function:: tinkerforge call rotary-poti-bricklet <uid> get-identity  


 :returns uid: string
 :returns connected-uid: string
 :returns position: char
 :returns hardware-version: int,int,int
 :returns firmware-version: int,int,int
 :returns device-identifier: int (has symbols)

 Returns the UID, the UID where the Bricklet is connected to, 
 the position, the hardware and firmware version as well as the
 device identifier.
 
 The position can be 'a', 'b', 'c' or 'd'.
 
 The device identifier numbers can be found :ref:`here <device_identifier>`.
 |device_identifier_constant|
 


Callback Configuration Functions
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^



.. sh:function:: tinkerforge call rotary-poti-bricklet <uid> set-position-callback-period <period> 

 :param <period>: int

 :noreturn: no output

 Sets the period in ms with which the :sh:func:`position <rotary-poti-bricklet position>` callback is triggered
 periodically. A value of 0 turns the callback off.
 
 :sh:func:`position <rotary-poti-bricklet position>` is only triggered if the position has changed since the
 last triggering.
 
 The default value is 0.
 
.. sh:function:: tinkerforge call rotary-poti-bricklet <uid> get-position-callback-period  


 :returns period: int

 Returns the period as set by :sh:func:`set-position-callback-period <rotary-poti-bricklet set-position-callback-period>`.
 
.. sh:function:: tinkerforge call rotary-poti-bricklet <uid> set-analog-value-callback-period <period> 

 :param <period>: int

 :noreturn: no output

 Sets the period in ms with which the :sh:func:`analog-value <rotary-poti-bricklet analog-value>` callback is triggered
 periodically. A value of 0 turns the callback off.
 
 :sh:func:`analog-value <rotary-poti-bricklet analog-value>` is only triggered if the analog value has changed since the
 last triggering.
 
 The default value is 0.
 
.. sh:function:: tinkerforge call rotary-poti-bricklet <uid> get-analog-value-callback-period  


 :returns period: int

 Returns the period as set by :sh:func:`set-analog-value-callback-period <rotary-poti-bricklet set-analog-value-callback-period>`.
 
.. sh:function:: tinkerforge call rotary-poti-bricklet <uid> set-position-callback-threshold <option> <min> <max> 

 :param <option>: char (has symbols)
 :param <min>: int
 :param <max>: int

 :noreturn: no output

 Sets the thresholds for the :sh:func:`position-reached <rotary-poti-bricklet position-reached>` callback. 
 
 The following options are possible:
 
 .. csv-table::
  :header: "Option", "Description"
  :widths: 10, 100
 
  "'x'",    "Callback is turned off"
  "'o'",    "Callback is triggered when the position is *outside* the min and max values"
  "'i'",    "Callback is triggered when the position is *inside* the min and max values"
  "'<'",    "Callback is triggered when the position is smaller than the min value (max is ignored)"
  "'>'",    "Callback is triggered when the position is greater than the min value (max is ignored)"
 
 The default value is ('x', 0, 0).
 
 The following symbols are available for this function:
 
 * ``off`` = x, for <option>
 * ``outside`` = o, for <option>
 * ``inside`` = i, for <option>
 * ``smaller`` = <, for <option>
 * ``greater`` = >, for <option>
 
.. sh:function:: tinkerforge call rotary-poti-bricklet <uid> get-position-callback-threshold  


 :returns option: char (has symbols)
 :returns min: int
 :returns max: int

 Returns the threshold as set by :sh:func:`set-position-callback-threshold <rotary-poti-bricklet set-position-callback-threshold>`.
 
 The following symbols are available for this function:
 
 * ``off`` = x, for option
 * ``outside`` = o, for option
 * ``inside`` = i, for option
 * ``smaller`` = <, for option
 * ``greater`` = >, for option
 
.. sh:function:: tinkerforge call rotary-poti-bricklet <uid> set-analog-value-callback-threshold <option> <min> <max> 

 :param <option>: char (has symbols)
 :param <min>: int
 :param <max>: int

 :noreturn: no output

 Sets the thresholds for the :sh:func:`analog-value-reached <rotary-poti-bricklet analog-value-reached>` callback. 
 
 The following options are possible:
 
 .. csv-table::
  :header: "Option", "Description"
  :widths: 10, 100
 
  "'x'",    "Callback is turned off"
  "'o'",    "Callback is triggered when the analog value is *outside* the min and max values"
  "'i'",    "Callback is triggered when the analog value is *inside* the min and max values"
  "'<'",    "Callback is triggered when the analog value is smaller than the min value (max is ignored)"
  "'>'",    "Callback is triggered when the analog value is greater than the min value (max is ignored)"
 
 The default value is ('x', 0, 0).
 
 The following symbols are available for this function:
 
 * ``off`` = x, for <option>
 * ``outside`` = o, for <option>
 * ``inside`` = i, for <option>
 * ``smaller`` = <, for <option>
 * ``greater`` = >, for <option>
 
.. sh:function:: tinkerforge call rotary-poti-bricklet <uid> get-analog-value-callback-threshold  


 :returns option: char (has symbols)
 :returns min: int
 :returns max: int

 Returns the threshold as set by :sh:func:`set-analog-value-callback-threshold <rotary-poti-bricklet set-analog-value-callback-threshold>`.
 
 The following symbols are available for this function:
 
 * ``off`` = x, for option
 * ``outside`` = o, for option
 * ``inside`` = i, for option
 * ``smaller`` = <, for option
 * ``greater`` = >, for option
 
.. sh:function:: tinkerforge call rotary-poti-bricklet <uid> set-debounce-period <debounce> 

 :param <debounce>: int

 :noreturn: no output

 Sets the period in ms with which the threshold callbacks
 
 * :sh:func:`position-reached <rotary-poti-bricklet position-reached>`,
 * :sh:func:`analog-value-reached <rotary-poti-bricklet analog-value-reached>`
 
 are triggered, if the thresholds
 
 * :sh:func:`set-position-callback-threshold <rotary-poti-bricklet set-position-callback-threshold>`,
 * :sh:func:`set-analog-value-callback-threshold <rotary-poti-bricklet set-analog-value-callback-threshold>`
 
 keep being reached.
 
 The default value is 100.
 
.. sh:function:: tinkerforge call rotary-poti-bricklet <uid> get-debounce-period  


 :returns debounce: int

 Returns the debounce period as set by :sh:func:`set-debounce-period <rotary-poti-bricklet set-debounce-period>`.
 


.. _rotary_poti_bricklet_shell_callbacks:

Callbacks
^^^^^^^^^

Callbacks can be used to receive time critical or recurring data from the
device:

.. code-block:: bash

    tinkerforge dispatch rotary-poti-bricklet <uid> example

The available callbacks are described below.

.. note::
 Using callbacks for recurring events is *always* preferred
 compared to using getters. It will use less USB bandwidth and the latency
 will be a lot better, since there is no round trip time.

.. sh:function::  tinkerforge dispatch rotary-poti-bricklet <uid> position

 :returns position: int


 This callback is triggered periodically with the period that is set by
 :sh:func:`set-position-callback-period <rotary-poti-bricklet set-position-callback-period>`. The parameter is the position of the
 Rotary Potentiometer.
 
 :sh:func:`position <rotary-poti-bricklet position>` is only triggered if the position has changed since the
 last triggering.
 
.. sh:function::  tinkerforge dispatch rotary-poti-bricklet <uid> analog-value

 :returns value: int


 This callback is triggered periodically with the period that is set by
 :sh:func:`set-analog-value-callback-period <rotary-poti-bricklet set-analog-value-callback-period>`. The parameter is the analog value of the
 Rotary Potentiometer.
 
 :sh:func:`analog-value <rotary-poti-bricklet analog-value>` is only triggered if the position has changed since the
 last triggering.
 
.. sh:function::  tinkerforge dispatch rotary-poti-bricklet <uid> position-reached

 :returns position: int


 This callback is triggered when the threshold as set by
 :sh:func:`set-position-callback-threshold <rotary-poti-bricklet set-position-callback-threshold>` is reached.
 The parameter is the position of the Rotary Potentiometer.
 
 If the threshold keeps being reached, the callback is triggered periodically
 with the period as set by :sh:func:`set-debounce-period <rotary-poti-bricklet set-debounce-period>`.
 
.. sh:function::  tinkerforge dispatch rotary-poti-bricklet <uid> analog-value-reached

 :returns value: int


 This callback is triggered when the threshold as set by
 :sh:func:`set-analog-value-callback-threshold <rotary-poti-bricklet set-analog-value-callback-threshold>` is reached.
 The parameter is the analog value of the Rotary Potentiometer.
 
 If the threshold keeps being reached, the callback is triggered periodically
 with the period as set by :sh:func:`set-debounce-period <rotary-poti-bricklet set-debounce-period>`.
 


