Added Switch Joycon sample.

Sming/Libraries/SwitchJoycon/README.rst

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+Switch Joycon
+=============
+
+.. highlight:: c++
+
+Introduction
+------------
+This library allows you to make the ESP32 act as a Nintendo Switch Joycon and control what it does.  
+The library uses :library:`NimBLE` for faster and lighter communication.
+
+Disclaimer
+----------
+We are not affiliated, associated, authorized, endorsed by, or in any way officially connected with Nintendo, 
+or any of its subsidiaries or its affiliates. 
+The names Nintendo, Nintendo Switch and Joycon as well as related names, marks, emblems and images are 
+registered trademarks of their respective owners.
+
+Features
+--------
+
+Using this library you can do the following:
+
+ - Button press and release (16 buttons)
+ - Switch Hat (1 hat )
+ - Rotate 4 Axis
+
+Using
+-----
+
+1. Add ``COMPONENT_DEPENDS += SwitchJoycon`` to your application componenent.mk file.
+2. Add these lines to your application::
+
+	#include <SwitchJoycon.h>
+	
+	namespace
+	{
+		SwitchJoycon joycon;
+	
+		// ...
+	
+	} // namespace
+		
+	void init()
+	{
+		// ...
+		
+		joycon.begin();
+	}
+
+
+Notes
+-----
+By default, reports are sent on every button press/release or axis/hat movement, however this can be disabled::
+
+	joycon.setAutoReport(false);
+ 
+and then you should manually call sendReport on the joycon instance as shown below::
+
+	joycon.sendReport();
+
+
+HID Debugging
+-------------
+
+On Linux you can install `hid-tools <https://gitlab.freedesktop.org/libevdev/hid-tools>`__ using the command below::
+
+	sudo pip3 install .
+
+Once installed hid-recorder can be used to check the device HID report description and sniff the different reports::
+
+	sudo hid-recorder
+
+Useful Links
+------------
+- `Tutorial about USB HID Report Descriptors <https://eleccelerator.com/tutorial-about-usb-hid-report-descriptors/>`__
+- `HID constants <https://github.com/katyo/hid_def/blob/master/include/hid_def.h>`__

Sming/Libraries/SwitchJoycon/component.mk

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+COMPONENT_SOC := esp32*
+COMPONENT_DEPENDS := NimBLE
+
+COMPONENT_SRCDIRS := src
+COMPONENT_INCDIRS := $(COMPONENT_SRCDIRS)

Sming/Libraries/SwitchJoycon/samples/Bluetooth_Joycon/Makefile

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+#####################################################################
+#### Please don't change this file. Use component.mk instead ####
+#####################################################################
+
+ifndef SMING_HOME
+$(error SMING_HOME is not set: please configure it as an environment variable)
+endif
+
+include $(SMING_HOME)/project.mk

Sming/Libraries/SwitchJoycon/samples/Bluetooth_Joycon/README.rst

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+Switch Joycon
+=============
+
+Introduction
+------------
+This sample turns the ESP32 into a Switch Joycon (Bluetooth LE gamepad) that presses buttons and moves axis
+
+Possible buttons are 0 through to 15.
+
+Possible HAT switch position values are:
+Centered, Up, UpRight, Right, DownRight, Down, DownLeft, Left, UpLeft.
+
+
+Testing
+-------
+
+You can use one of the following applications on your PC to test and see all buttons that were clicked.
+
+On Linux install ``jstest-gtk`` to test the ESP32 gamepad. Under Ubuntu this can be done by typing the following command::
+
+	sudo apt install jstest-gtk
+	
+On Windows use this `Windows test application <http://www.planetpointy.co.uk/joystick-test-application/>`__.

Sming/Libraries/SwitchJoycon/samples/Bluetooth_Joycon/app/application.cpp

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+#include <SmingCore.h>
+#include <SwitchJoycon.h>
+
+namespace
+{
+Timer procTimer;
+
+void onConnect(NimBLEServer& server);
+void onDisconnect(NimBLEServer& server);
+
+SwitchJoycon joycon(SwitchJoycon::Type::Left, 100, onConnect, onDisconnect);
+
+void loop()
+{
+	if(!joycon.isConnected()) {
+		return;
+	}
+
+	uint8_t button = random(0, 15);
+
+	joycon.press(button);
+	joycon.setHat(SwitchJoycon::JoystickPosition::UpLeft);
+	delay(5000);
+
+	joycon.release(button);
+	joycon.setHat(SwitchJoycon::JoystickPosition::Center);
+	delay(5000);
+}
+
+void onConnect(NimBLEServer& server)
+{
+	Serial.println("Connected :) !");
+
+	procTimer.initializeMs(500, loop).start();
+}
+
+void onDisconnect(NimBLEServer& server)
+{
+	procTimer.stop();
+	Serial.println("Disconnected :(!");
+}
+
+} // namespace
+
+void init()
+{
+	Serial.begin(COM_SPEED_SERIAL);
+	Serial.systemDebugOutput(true);
+
+	Serial.println("Starting Joycon Gamepad sample!");
+	joycon.begin();
+	// Auto reporting is enabled by default.
+	// Use joycon.setAutoReport(false); to disable auto reporting, and then use joycon.sendReport(); as needed
+}

Sming/Libraries/SwitchJoycon/samples/Bluetooth_Joycon/component.mk

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+COMPONENT_DEPENDS := SwitchJoycon