Include to add

#include <MTobjects.h> // See http://arduino.dansetrad.fr/en/MTobjects

I strongly advise to leave the comment, if another person wanted to try the program, they would have a download link directly. This is valid for all the libraries you use.

Useful comment

if_not_pressed

This comment is a word that can be added anywhere and which is ignored by the compiler.

Constructor

MTbutton(pin,
         onSelectFunction =  NO_ACTION,
         onUnselectFunction = NO_ACTION,
         rest = HIGH);

• pin (uint8_t): pin to which the button is connected
• onSelectFunction: what happens when you press the button
  • NO_ACTION → nothing happens
  • myFunction → call a function "void myFunction(void) {...}"
• onUnselectFunction: what happens when you release the button
  • NO_ACTION → nothing happens
  • myFunction → call a function "void myFunction(void) {...}"
• rest (boolean): pin state if the button is release
  • HIGH → if it is wired between GND and pin (recommended). The pullup resistor is automatically added
  • LOW → if it is wired between VCC and pin, with a pulldown resistance between pin and GND

Useful variable

bounce

bounce (word): time during which rebounds are ignored. By default 32ms, rounded up to packages of 16ms upper. f.ex. BOUNCE = 50 milli_seconds; gives 64ms maximum rebounds.

Useful functions

boolean getSelect(void);
virtual void onSelect(void);
virtual void onUnselect(void);

getSelect: return true if the button is pushed
onSelect: overload function called when pressing the button
onUnselect: overload function called when releasing the button

Bonus functions

void setOnSelectFunction(onSelectFunction);
void setOnSelectFunction();
void setOnUnselectFunction(onUnselectFunction);
void setOnUnselectFunction();

setOnSelectFunction: changes the function called when pressing the button
setOnSelectFunction: without parameters removes the function called when pressing the button
setOnUnselectFunction: changes the function called during releasing the button
setOnUnselectFunction: without parameters removes the function called when releasing the button

Examples

• Light a LED on a press button
• Send the letter A on a press button
• Send letters on press buttons
• Timer