extended the readme for micro:bit usage

Author: Patrick Blitz

README.md

@@ -24,7 +24,7 @@ pin_clk = Pin(5, Pin.OUT)
 pin_data = Pin(4, Pin.OUT)
 
 num_leds = 10
-chain = p9813.P9813(pin_clk, pin_data, num_leds)
+chain = p9813.P9813(pin_clk, pin_data, num_leds, False)
 
 # set the first LED to red
 chain[0] = (255, 0, 0)
@@ -45,13 +45,13 @@ chain.reset()
 
 See [p9813_examples.py](p9813_examples.py) and [examples](examples/) for more.
 
-## Parts
+### Parts
 
 * [WeMos D1 Mini](https://www.aliexpress.com/store/product/D1-mini-Mini-NodeMcu-4M-bytes-Lua-WIFI-Internet-of-Things-development-board-based-ESP8266/1331105_32529101036.html) $4.00 USD
 * [Grove - Chainable RGB LED](https://www.seeedstudio.com/Grove-Chainable-RGB-LED-p-850.html) $3.90 USD
 * [Grove Male Jumper Cable](https://www.seeedstudio.com/Grove-4-pin-Male-Jumper-to-Grove-4-pin-Conversion-Cable-%285-PCs-per-Pack%29-p-1565.html) $2.90 USD
 
-## Connections
+## #Connections
 
 WeMos D1 Mini | Grove Chainable RGB LED
 ------------- | -----------------------
@@ -69,13 +69,67 @@ DO   | DI (white)
 VCC  | VCC (red)
 GND  | GND (black)
 
-## Links
+### Links
 
 * [WeMos D1 Mini](https://wiki.wemos.cc/products:d1:d1_mini)
 * [micropython.org](http://micropython.org)
 * [Adafruit Ampy](https://learn.adafruit.com/micropython-basics-load-files-and-run-code/install-ampy)
 * [P9813 datasheet](https://raw.githubusercontent.com/SeeedDocument/Grove-Chainable_RGB_LED/master/res/P9813_datasheet.pdf)
 
+## Example for BBC micro:bit
+
+### Software Setup - mu
+
+* Download and setup the [mu editor](https://codewith.mu/).
+* Copy the `p9813.py` file from this repository into your `mu` code directory (usually ```USER_DIR/mu```)
+* Create a new file with the code below
+* Flash it to the micro:bit. **This will fail, the mirco:bit will display an error message**
+* Go into the files section of mu and copy the `p9813.py` file over. 
+* micro:bit will restart and it should work
+
+### Software Setup - micro:bit editor
+
+* go to the [micro:bit python editor](https://python.microbit.org/v/2.0)
+* select `Load/Save`
+* Unfold the *Project Files* at the bottom of the pop-up
+* Select *Add File* and select the `p9813.py` file from this repo
+* paste the sample code below 
+* flash the mirco:bit
+
+### Example Script
+
+```python
+from microbit import *
+from p9813 import P9813
+
+pin_clk = pin14
+pin_data = pin0
+
+num_leds = 2
+chain = P9813(pin_data, pin_clk, num_leds, True)
+
+# set the first LED to red
+chain[0] = (255, 0, 0)
+
+# set the second LED to green
+chain[1] = (0, 255, 0)
+
+# write data to all LEDs
+chain.write()
+sleep(200)
+# make all LEDs red
+chain.fill((255,0,0))
+chain.write()
+sleep(2000)
+# turn off all LEDs
+chain.reset()
+```
+
+### Parts: 
+* [micro:bit](https://microbit.org/)
+* [mirco:bit groove shield](https://www.seeedstudio.com/Grove-Shield-for-micro-bit-v2-0.html)
+* [Grove - Chainable RGB LED](https://www.seeedstudio.com/Grove-Chainable-RGB-LED-p-850.html)
+
 ## License
 
 Licensed under the [MIT License](http://opensource.org/licenses/MIT).