MpDuino
=====================

A small project to interface an Arduino Uno with an OLED display, 
rotary encoder to a MPD server. 


Idea is to have one script `mpduino.py` creating multiple processes to
which one can attach

From PySerial to Arduino
-------------------------

A command looks like `[ES][VTAarzxcusP].*`.
Where `S` stands for set and `E` is to echo a value. The `[VTAarzxcusP]`
part selects what to set or echo. You can use `S!.*` to echo a message
back.

|	Character	|	Property	|	`.*`					|
|---------------|---------------|---------------------------|
|	V 			| 	Volume      |  number					|
|	T 			| 	Title       |  text    					|
|	A 			| 	Artist      |  text    					|
|	a 			| 	album       |  text    					|
|	P 			| 	Playing     |  empty(false)/text(true)	|
|	r 			| 	repeat      |  empty(false)/text(true)	|
|	z 			| 	shuffle     |  empty(false)/text(true)	|
|	x 			| 	random      |  empty(false)/text(true)	|
|	c 			| 	consume     |  empty(false)/text(true)	|
|	u 			| 	updating    |  empty(false)/text(true)	|
|	s 			| 	single      |  empty(false)/text(true)	|

From Arduino to PySerial instance
---------------------------------
Since the Arduino has a rotary encoder for the volume and play/pause, we
need to pass these through. Next tot this, we might reset the arduino,
without resetting the pySerial script, so we need to set all values
again.


|	Character	|	Property	|
|---------------|---------------|
|	R			|	Reset		|
|	V 			| 	Volume      |
|	P			|	Pause/Play	|
|	t			|	Temperature	|
|	h			|	Humidity	|