pyPS4Controller

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pyPS4Controller

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Light module (less than 30KB) without any dependencies designed to provide hooks for PS4 Controller events

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# pyPS4Controller
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##

![PS4 Controller](https://github.com/ArturSpirin/pyPS4Controller/blob/master/assets/ds4.jpg)

pyPS4Controller is a light module (less than 30KB) without any dependencies designed to provide hooks for PS4 Controller events on Linux.

## Installation
`sudo pip install pyPS4Controller`

## Usage

1. Connect your controller to Bluetooth. Either via GUI, bluetoothctl, or ds4drv (_Not recommended, see why at the bottom_).
2. Check which interfaces you have available at `/dev/input` via `ls -la /dev/input` command. 
You are looking for `jsN` interfaces. When you connect a new device, there should be a new file created and its 
typically starts at `js0`. The more controllers/joysticks are connected the more `jsN` interfaces you will see. 
So if you have only one controller/joystick connected, you should only see 1 interface: `/dev/input/js0`, 
take a note of it as we will need it in next step. _If you have multiple controllers and not sure which interface 
belongs to which controller, you can disconnect it see which interface is no longer available._
3. Copy the code bellow into a Python file, lets say `test.py`
    ```python
    from pyPS4Controller.controller import Controller
    
    
    class MyController(Controller):
    
        def __init__(self, **kwargs):
            Controller.__init__(self, **kwargs)
    
    
    controller = MyController(interface="/dev/input/js0", connecting_using_ds4drv=False)
    controller.listen()
    ```
4. Now run that file like so `python test.py` and use your controller. 
You will see output on your screen based on the input to your controller. 
You can bind your own logic to each one of those events. 
Lets say you want print "Hello world" on X press and "Goodbye world" on X release then the code would look like this:
    ```python
    from pyPS4Controller.controller import Controller
        
        
    class MyController(Controller):
    
        def __init__(self, **kwargs):
            Controller.__init__(self, **kwargs)
    
        def on_x_press(self):
           print("Hello world")

def on_x_release(self):
           print("Goodbye world")
   
    controller = MyController(interface="/dev/input/js0", connecting_using_ds4drv=False)
   # you can start listening before controller is paired, as long as you pair it within the timeout window
    controller.listen(timeout=60)
    ```
   
    Here is a list of all the events you can override in a similar manner:
    ```
    on_x_press
    on_x_release
    on_triangle_press
    on_triangle_release
    on_circle_press
    on_circle_release
    on_square_press
    on_square_release
    on_L1_press
    on_L1_release
    on_L2_press
    on_L2_release
    on_R1_press
    on_R1_release
    on_R2_press
    on_R2_release
    on_up_arrow_press
    on_up_down_arrow_release
    on_down_arrow_press
    on_left_arrow_press
    on_left_right_arrow_release
    on_right_arrow_press
    on_L3_up
    on_L3_down
    on_L3_left
    on_L3_right
    on_L3_x_at_rest  # L3 joystick is at rest after the joystick was moved and let go off on x axis
    on_L3_y_at_rest  # L3 joystick is at rest after the joystick was moved and let go off on y axis
    on_L3_press  # L3 joystick is clicked. This event is only detected when connecting without ds4drv
    on_L3_release  # L3 joystick is released after the click. This event is only detected when connecting without ds4drv
    on_R3_up
    on_R3_down
    on_R3_left
    on_R3_right
    on_R3_x_at_rest  # R3 joystick is at rest after the joystick was moved and let go off on x axis
    on_R3_y_at_rest  # R3 joystick is at rest after the joystick was moved and let go off on y axis
    on_R3_press  # R3 joystick is clicked. This event is only detected when connecting without ds4drv
    on_R3_release  # R3 joystick is released after the click. This event is only detected when connecting without ds4drv
    on_options_press
    on_options_release
    on_share_press  # this event is only detected when connecting without ds4drv
    on_share_release  # this event is only detected when connecting without ds4drv
    on_playstation_button_press  # this event is only detected when connecting without ds4drv
    on_playstation_button_release  # this event is only detected when connecting without ds4drv
    ```

# Why ds4drv is not recommended?

This module was originally written to work with ds4drv but I have experienced a number of problems like:
- Random events for R3 joystick and some button presses were coming through when controller was not even used and 
they would also be generated when controller was in use. This was the biggest issue I could not get over.
- My controller would frequently disconnect from ds4drv.
- Pairing it back in rare cases took many retries.
- Not all events are sent to the interface. If you decide to connect through ds4drv those button events are not supported:
  - L3 & R3 Clicks/Releases (Joysticks work, its just the click on the top of the joystick is not detected)
  - Events on the Playstation button is not detected
  - Share button events are not detected
  
If you still want to connect using ds4drv here is a [video tutorial](https://www.youtube.com/watch?v=CeyGP3_kKZI) on 
how to do it or you can follow the steps bellow:

1. First, you have to make sure you can connect your PS4 controller with ds4drv. You can do it 1 of 2 ways and you only need to do this once.
   * Manually by following [this instructions](https://github.com/macunixs/dualshock4-pi)
   * Automatically by running `py3ps4c init` (if you are using python3) or `py2ps4c init` (if you are using python2) in your terminal.
   
2. (Optional) connect your controller directly to the computer's Bluetooth module. 
       Once successful, disconnect the controller. If you don't do this, in the next step you may see this error: 
       `Unable to connect to detected device: Failed to set operational mode: [Errno 107] Transport endpoint is not connected`
3. Now start `sudo ds4drv` and press `SHARE` + `PS4` button on your controller. If pairing fails, you want
to try in again, it should eventually connect.

# Overloading event detection
If default button mapping is off (see issue [#1](https://github.com/ArturSpirin/pyPS4Controller/issues/1)), you may want to try to overload 
the event detection for those buttons. In order to do that you will need to know 3 pieces of information
- button id
- button type
- value the button carries

All of that info you can acquire by turning on debug mode and pressing buttons on the controller to acquire the info above. 
Here is an example on how to do it.

```python
from pyPS4Controller.controller import Controller
from pyPS4Controller.event_mapping.DefaultMapping import DefaultMapping
    
    
class MyController(Controller):

def __init__(self, **kwargs):
        Controller.__init__(self, **kwargs)

def on_x_press(self):
       print("Hello world")

def on_x_release(self):
       print("Goodbye world")

class MyEventDefinition(DefaultMapping):

def __init__(self, **kwargs):
        DefaultMapping.__init__(self, **kwargs)
    
    # each overloaded function, has access to:
    # - self.button_id
    # - self.button_type
    # - self.value
    # - self.overflow
    # use those variables to determine which button is being pressed
    def x_pressed(self):
        return self.button_id == 0 and self.button_type == 1 and self.value == 1

def x_released(self):
        return self.button_id == 0 and self.button_type == 1 and self.value == 0

controller = MyController(interface="/dev/input/js0", connecting_using_ds4drv=False, event_definition=MyEventDefinition)
controller.debug = True  # you will see raw data stream for any button press, even if that button is not mapped
# you can start listening before controller is paired, as long as you pair it within the timeout window
controller.listen(timeout=60)

```

# Registering Callbacks
From version 1.1.9 its possible to bound callbacks to the `listen` function.
Two call back functions can be registered: `on_connect` & `on_disconnect`
Here is an example how to do it.
```python
from pyPS4Controller.controller import Controller

def connect():
    # any code you want to run during initial connection with the controller
    pass

def disconnect():
    # any code you want to run during loss of connection with the controller or keyboard interrupt
    pass

class MyController(Controller):

def __init__(self, **kwargs):
        Controller.__init__(self, **kwargs)

controller = MyController(interface="/dev/input/js0", connecting_using_ds4drv=False)
controller.listen(on_connect=connect, on_disconnect=disconnect)
```

# Registering input sequences with a callback.
   ```python
   from pyPS4Controller.controller import Controller
   
   
   def konami_callback():
       print("Konami sequence detected!")

def my_sequences():
       return [
           {"inputs": ['up', 'up', 'down', 'down', 'left', 'right', 'left', 'right', 'share', 'options'],
            "callback": konami_callback}
       ]

controller = Controller(interface="/dev/input/js0", connecting_using_ds4drv=False)
   controller.listen(on_sequence=my_sequences())
   ```
   
   List of all the inputs you can use:
   ```
   x
   square
   triangle
   circle
   up
   down
   left
   right
   L1
   L2
   L3
   R1
   R2
   R3
   left_joystick
   right_joystick
   share
   options
   ps
   ```

# Overriding event format
On some systems like Linux Mint, the event format may be different from the default `LhBB`. A symptom for which may be:
1. Button mapping is off
2. Need to press button twice to register the release event
For more info see [#5](https://github.com/ArturSpirin/pyPS4Controller/issues/5)
To address this issue it is now possible, from version 1.2.0, to override the default formal like so:
```python
...
if __name__ == "__main__":
    controller = Controller(
        interface="/dev/input/js0",
        event_format="3Bh2b"
    )
    controller.listen()
```

## Known limitations at this time
* Mouse pad events and clicks are not detected
* Sensor information (accelerometers and/or gyro) is not detected

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