Add ESP mode tutorial using MicroPython

en/tutorials/1.1/esp.md

@@ -1,60 +1,39 @@
 ---
 layout: default
-title: Adafruit Boards and Mu
+title: ESP Boards and Mu
 i18n: en
 ---
 
-# Adafruit Boards and Mu
-
-[Adafruit](http://adafruit.com/) make a wide variety of amazing microcontroller
-based boards which are capable of running their own version of MicroPython
-called [CircuitPython](https://www.adafruit.com/circuitpython). These boards
-range from the incredibly small to powerful boards with tons of built-in
-hardware features. Even better, Adafruit have nurtured and grown a thriving
-online community associated with CircuitPython and their amazing line of
-boards. This is a supportive and helpful place to be if you're a beginner
-coder -- especially if you're into making small embedded computers (such as the
-boards made by Adafruit) do funky stuff with real-world peripherals, then this
-is the place for you.
-
-Mu's Adafruit mode is made in collaboration with Adafruit and makes it very
-easy to create projects and write code for their line of boards. For example,
-your Python code to run on Adafruit boards is *stored on the boards*. Mu
-understands this and will detect and open files on any device plugged into your
-regular computer.
-
-The extra functionality provided by Adafruit mode is contained in the following
+# ESP8266 and ESP32 boards and Mu
+
+ESP8266 and ESP32 boards are small, cheap and connect to the Internet.  
+These boards are capable of running 
+[MicroPython](https://www.raspberrypi.com/documentation/microcontrollers/micropython.html).
+
+The extra functionality provided by ESP MicroPython mode is contained in the following
 buttons:
 
 <div class="row">
-  <img src="/img/en/tutorials/adafruit_buttons.png" alt="Buttons from the Adafruit mode" class="img-responsive center-block img-rounded movie"/>
+  <img src="/img/en/tutorials/rp2040_buttons.png" alt="Buttons for rp2040 mode" class="img-responsive center-block img-rounded movie"/>
   <br/>
 </div>
 
-The "Serial" button opens a serial data connection to the Adafruit board you
+The "Run" button runs your Python code and opens the REPL pane to display any output.
+
+The "Files" button opens two panes below the code editor.  The left pane lists files stored
+on your microcontroller and the right pane lists files stored on your computer.
+
+The "REPL" button opens a serial data connection to the Raspberry Pi Pico board you
 may have connected to your computer. This will result in a new pane between the
 text editor and Mu's footer. Any serial data emitted from the device will
-appear here. If you need to drop into the CircuitPython REPL you should make
-sure the pane has keyboard focus (just click it!) and then type CTRL-C, as
-shown below:
+appear here. You can interact with the MicroPython REPL by clicking in the REPL pane 
+to have focus.
 
-<div class="row">
-  <img src="/img/en/tutorials/adafruit_serial.gif" alt="Adafruit serial" class="img-responsive center-block img-rounded movie"/>
-  <br/>
-</div>
+You can only have Files or REPL open at a time.
 
 The "Plotter" button opens Mu's plotter. If your device is outputting tuples
 of numbers via the serial connection, the plotter will display them as a
 graph. This is incredibly useful for visualising any data you might be
 measuring via the device. For more information read the
 [tutorial about Mu's plotter](plotter).
 
-<div class="row">
-  <img src="/img/en/tutorials/adafruit_plotter.gif" alt="Adafruit plotter" class="img-responsive center-block img-rounded movie"/>
-  <br/>
-</div>
-
-If you're looking for things to do with your Adafruit board, there's no better
-place to look than the
-[Adafruit Learning System](https://learn.adafruit.com/category/circuitpython)
-on their website.