help adapting code for teensy xbee wireless midi controller

Using Arduino Project Guidance
1

Hello and thanks for reading.

I'm new to coding, but have been lurking here for about 5 months and have built a large midi controller using the control surface library.

Now I am trying to create a simple wireless usb midi controller. I have successfully built this project:

which is exactly what I want, but it is designed for 1 potentiometer sending a midi cc message.

I want to adapt this code to read 4 momentary buttons and send independent usbMidi note on/off messages for each. I'm really not sure on the best way to implement this and would appreciate any advice.

specifically:
-should I bounce buttons in node code
-I guess i need to enable digital pins and pullup resistors
-How should I get the uart.available on the base to differentiate between the 4 buttons on the node?

I'm using 2 teensy 2.0, and 2 XBEE series 3 pro configured as series 1 in transparent mode.

Thanks!

(This is my first post, I hope this is the correct way to share code.)

base code (wireless receiver plugged into computer for midi control of ableton or other daw):

#include <SoftwareSerial.h>

byte data; 

HardwareSerial Uart = HardwareSerial();

void setup() {
  Uart.begin(9600);
  pinMode(11, OUTPUT); 
}

void loop() {
  if(Uart.available() > 0) {
    data = Uart.read();
    delay(1); 
    usbMIDI.sendControlChange(1, data / 2, 1);
  }
}

Node code (wireless transmitter connected to a pot on analog 0):

#include <SoftwareSerial.h>

byte previous; 
byte data; 

HardwareSerial Uart = HardwareSerial();

void setup() {
  Uart.begin(9600);
}

void loop() {
  data = analogRead(0) / 4; 
  
  if(data != previous) {
    previous = data; 
    Uart.write(data); 
    delay(10);  
    
  }
}

xbee_base.ino (283 Bytes)

xbee_node.ino (284 Bytes)