Digispark PTT Code

MotoUSB.ino

/*
This program will send USB HID keyboard presses to initiate
a PTT call with system of choice.
 * Press and hold button 1 to activate PTT (Push-to-Talk) functionality.
*/

#include <DigiKeyboard.h> // Library for sending keystrokes as an HID device over USB
#include <OneButton.h>    // Library for button input functions

  OneButton button1(
    0,          // Pin Number
    true,       // Input is active LOW
    true        // Enable internal pull-up resistor
  );


void setup() {
  button1.attachLongPressStart(button1longPressStart); // Set up button 1 for ptt press
  button1.attachLongPressStop(button1longPressStop); // Set up button 1 for ptt release
  button1.setPressTicks(250); // Reduce long-press delay for button 1 to make ptt more responsive
  

  DigiKeyboard.delay(50); // Delay before entering loop
}

void loop() {
  DigiKeyboard.update(); // Maintain USB communication
  button1.tick(); // Check status of buttons in a continuous loop


}


// This function will be called when button 1 is pressed and held down for more than 300ms.
void button1longPressStart() {
  DigiKeyboard.sendKeyStroke(0); // Clear any current key presses
  DigiKeyboard.sendKeyPress(0,MOD_ALT_LEFT); // Press and hold the F7 key to trigger ptt
}


// This function will be called when button 1 is released after being held down.
void button1longPressStop() {
  DigiKeyboard.delay(300); // Delay to prevent cutting off the speaker's last word
  DigiKeyboard.sendKeyPress(0); // Release F7 key to stop ptt
}