docs: Include V2 features in tutorials (#709)

* docs: update-tutorials for V2

* docs: update images

* remove pin functions reference link

* reduce size of image

* Update docs/pin.rst

* Update docs/pin.rst

* Update docs/tutorials/io.rst

Co-authored-by: Carlos Pereira Atencio <[email protected]>

Author: microbit-mark

docs/tutorials/blue-microbit.png

@@ -8,17 +8,21 @@ for short).
 .. image:: blue-microbit.png
     :width: 300px
     :align: center
+    :alt: micro:bit with pins labelled
 
 Some of the pins are bigger than others so it's possible to attach crocodile
 clips to them. These are the ones labelled 0, 1, 2, 3V and GND (computers
 always start counting from zero). If you attach an edge connector board to the
 device it's possible to plug in wires connected to the other (smaller) pins.
 
+On the latest micro:bit **V2** the micro:bit logo can also be used as a touch
+input.
+
 In MicroPython, each pin on the BBC micro:bit is represented by an *object*
 called ``pinN``, where ``N`` is the number pf the pin.
 
 For example, to use the pin labelled 0 (zero), you can use the object called
-``pin0`` in your script.
+``pin0`` in your script. The logo pin **V2** uses ``pin_logo``.
 
 These objects have various *methods* associated with them depending upon what
 the specific pin is capable of eg. read, write or touch.
@@ -41,6 +45,20 @@ With one hand, hold your micro:bit by the GND pin. Then, with your other hand,
 touch (or tickle) the 0 (zero) pin. You should see the display change from
 grumpy to happy!
 
+When you use the latest micro:bit **V2** you can also change the default
+behaviour of the pin, so that you don't have to touch GND at all.::
+
+    from microbit import *
+    pin0.set_touch_mode(pin0.CAPACITIVE)
+    while True:
+        if pin0.is_touched():
+            display.show(Image.HAPPY)
+        else:
+            display.show(Image.SAD)
+
+The default for the edge connector pins is `resistive` and the logo pin
+**V2** is `capacitive`.
+
 This is a form of very basic input measurement. However, the fun really starts
 when you plug in circuits and other devices via the pins.
 

docs/tutorials/happy.png

@@ -3,7 +3,7 @@ Music
 
 MicroPython on the BBC micro:bit comes with a powerful music and sound module.
 It's very easy to generate bleeps and bloops from the device by attaching a
-speaker or set of wired headphones.
+speaker or set of wired headphones, or by using the built-in speaker **V2**.
 
 If you are attaching a speaker, a passive piezo buzzer, or headphones, you can
 use crocodile clips to attach pin 0 and GND to the positive and negative inputs.

docs/tutorials/io.rst

@@ -30,9 +30,14 @@ In any case, we're going to create a DALEK poetry recital on demand.
 Say Something
 +++++++++++++
 
-Before the device can talk you need to plug in a speaker like this:
+If you have the latest micro:bit **V2** device, you can use the built-in
+speaker as well as or instead of connecting a speaker or set of headphones
+like this:
 
-.. image:: ../speech.png
+.. image:: pin0-gnd.png
+    :width: 250px
+    :align: center
+    :alt: piezo connected to pin0 and GND
 
 The simplest way to get the device to speak is to import the ``speech`` module
 and use the ``say`` function like this::
@@ -46,10 +51,10 @@ change some of the parameters that the speech synthesiser uses to produce the
 voice. Our speech synthesiser is quite powerful in this respect because we can
 change four parameters:
 
-* ``pitch`` - how high or low the voice sounds (0 = high, 255 = Barry White)
-* ``speed`` - how quickly the device talks (0 = impossible, 255 = bedtime story)
-* ``mouth`` - how tight-lipped or overtly enunciating the voice sounds (0 = ventriloquist's dummy, 255 = Foghorn Leghorn)
-* ``throat`` - how relaxed or tense is the tone of voice (0 = falling apart, 255 = totally chilled)
+* ``pitch`` - how high or low the voice sounds (0 = high, 255 = low)
+* ``speed`` - how quickly the device talks (0 = fast, 255 = slow)
+* ``mouth`` - how tight-lipped or overtly enunciating the voice sounds (0 = closed mouth, 255 = open mouth)
+* ``throat`` - how relaxed or tense is the tone of voice (0 = tense, 255 = relaxed)
 
 Collectively, these parameters control the quality of sound - a.k.a. the
 timbre. To be honest, the best way to get the tone of voice you want is to