![sylvester](pictures/cat.jpg)

# SD Card
Make sure the first partition of the SD card is the one that contains the example files.  It should be formatted FAT32.

# Wiring - digital pins on Arduino Nano

## MP3 Module D8..D10
Connect pins 8 and 9 to the YX5300 UART.  (pin 10 is not usable)
* D9 is transmit pin
* D8 is receive pin

## Triggers D2..D6
Ground pin to trigger playing mp3 files in assigned folder 01..05.  Pin D2 is assigned folder 01.


# Bridge Control
Send commands to the Arduino Nano hardware UART TX1..RX0.  The software will control the YX5300. Control at 9600bps.

## Commands
* h = Help
* p = Play
* P = Pause
* > = Next
* < = Previous
* + = Volume UP
* - = Volume DOWN
* c = Query current file
* q = Query status
* v = Query volume
* x = Query folder count
* t = Query total file count
* 1 = Play folder 1
* 2 = Play folder 2
* 3 = Play folder 3
* 4 = Play folder 4
* 5 = Play folder 5
* S = Sleep
* W = Wake up
* r = Reset


# Reprogramming
Sketch is included on [SD card](".\arduino\ArduinoSerialMP3Player\ArduinoSerialMP3Player\ArduinoSerialMP3Player.ino")
I had a problem trying to program this using the Arduino 1.8.7, these are the steps I took to resolve:

1.  Install the AltSoftSerial Library from Paul
2.  Arduino IDE program - select Tools -> Board (Arduino Nano)
3.  Arduino IDE program - select Tools -> Processor (ATmega328 old bootloader)
4.  Arduino IDE program - [Ctrl] + [R] to compile and upload

## ArduinoSerialMP3Player
Modified the code to use Paul's altSoftSerial and added trigger pins.  Otherwise nothing else was modified, original repo is on [github/cefaloide](https://github.com/cefaloide/ArduinoSerialMP3Player)


# Sounds
To make cat noises some sample mp3 were collected from the internet.  Audacity was used to make modifications and to analyze the samples.
![audacity](pictures/audacity.png)

## Process
1.  Open the one hour file.
2.  Press the ']' button and type in the ending selection timestamp.
3.  Cut the selection, if selection was whitespace goto step 2.
4.  Press 'ctrl' + 'n' to create a new project.
5.  Press 'ctrl' + 'v' to paste selection into project.
6.  Press spacebar to play the sound.
7.  Count the number of syllables and remeber details about the sound played.
8.  Press 'alt' + 'a' then release, press 'a' to open the Frequency Analysis subwindow.
9.  Remeber the frequency with the highest energy.  Press 'esc' to close the subwindow.
10.  Press 'ctrl' + 's' to save the project.
11.  Give the file a name that includes the lenght, number of syllables, a description and the strongest frequency.
12.  Press enter to save using the given filename.
13.  Press 'ctrl' + 'w' to close the project.  Focus should return to the one hour file.
14.  Goto step 2.