Radio button style midi controller

Projects General Guidance
1

Hey all

I'n a little stuck with simplifying a part iof my project and hope someone can help.

I'm building a 10 button midi controller with an arduino mega. This controller sends one message per momentry button, lights the corresponding led and only one button is active at a time (so the other leds go out)

I've seen a sketch online on the hackersrus site and it works for what I want but.....

There a lots and lots of wires and I just dont have enough room in my enclosure and I cant make it any bigger as its fitting in an existing case.

I've seen a sketch online about radio buttons MD on wordpress. It turns pins from inputs to outputs. This would literally 1/4 the components and wires needed to achieve the same goal.

I have bread boarded and uploaded the sketch and the radio buttons work as buttons and light the leds to light.

I have added a when x pin is pressed serial print "x button pressed"

And I've monitored it in my serial monitor in arduino program.

The problem I am having it that it will only send the message after a short delay, which is not what I need.

In the serial monitor it does print the "address" (I guess that what it's called) that the radio button is using 0 1 2 or 3 all the time.

So my questions are

How can I use that number that is generated by the radio button to then trigger it to send my message (or midi command)

Is there another way that I can do it, to keep component and wireing easy. I'm a bit of a novice at this (bet you can tell)

Thanks in advance. P.s. sketch I'm working on is uploaded in the next post.

Baz

2

Do you think that it might help if you posted your sketch, using code tags when you do, and a schematic of your project ?

3 
// Example showing use of the MD_RadioButton library
//
#include <MD_RadioButton.h>


#define USE_CALLBACK  0

uint8_t pinArray[] = { 22, 23, 24, 25 };

MD_RadioButton  RB(ARRAY_SIZE(pinArray), pinArray);

void cbNotify(uint8_t sel)
// Callback funtion (when enabled)
{
  Serial.println(sel);
}

void setup() 
{
  Serial.begin(9600);
  
  RB.begin();
  RB.lampTest();

#if USE_CALLBACK
  Serial.println("Callback enabled");
  RB.setCallback(cbNotify);
#endif // USE_CALLBACK

  RB.select(0); // selects what radio button is at the start
}

void loop() 
{
#if USE_CALLBACK
  RB.read();
#else
  uint8_t sel;

  if ((sel = RB.read()) != NO_SELECT)
    Serial.println(sel);
#endif

if(digitalRead(22) == LOW){
    Serial.println(" 22 pressed.");
  }
    if(digitalRead(23) == LOW){
    Serial.println("23 pressed.");
  }
  if(digitalRead(24) == LOW){
    Serial.println("24 pressed.");
  }
  if(digitalRead(25) == LOW){
    Serial.println("25 pressed.");
  }
}

radiobutton-schematic.png

4

UKHeliBob:
Do you think that it might help if you posted your sketch, using code tags when you do, and a schematic of your project ?

Sorry was just on my way up to the pc