florent bodart

I have a project to do. I want to control a servo motor hitting a drum with midi sequences with an Arduino though Ableton live. Exemple in c/c 0-1-0-1 . The ‘hammer’ of the servo hits the second time and the 4th. I use Hairless-midi with IAC bus to send the midi infos on the Arduino, this part is working. Now I want to make move the hammer each time (for exemple) the C1 note pass in the midi signal. Can you help me on this? Thanks!

Servo myservo;  // create servo object to control a servo

// twelve servo objects can be created on most boards

int pos = 0;    // variable to store the servo position

 myservo.attach(9);  // attaches the servo on pin 9 to the servo object

   delay(15);                       // waits 15ms for the servo to reach the position

 for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees

Servo myservo;  // create servo object to control a servo
// twelve servo objects can be created on most boards

void setup() {
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object
}

void loop() {
  for (pos = 0; pos 
    // in steps of 1 degree
    delay(15);                       // waits 15ms for the servo to reach the position
  }
  for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees
    delay(15);                       // waits 15ms for the servo to reach the position
  }
}


ableton-arduino-servo

First, you need to print what Hairless-midi is sending to your Arduino. And use that to trigger a function that would move your servos. You most not use delay(); if you want to have something responsive.

https://www.arduino.cc/en/Reference/Serial

https://www.arduino.cc/en/Reference/Millis

I have a project I made that could have up to 32 servos controlled by MIDI, and I used a Teensy and a SSC-32. The Teensy allows you to build a MIDI instrument relatively flawlessly.You would just plug your homemade interface and your computer would see it like any MIDI instrument, and it would work directly in Live without need for Max4Live or Hairless. If you are using your setup for live performances or installation, I would advise such setup.

https://www.youtube.com/watch?v=zMy7sFLJ1l0

The SSC-32 is kind of an old board, so I did not make a HOW TO for that setup. But I did one for MIDI to stepper motors that is kind of similar on the principle, but, well, it is for steppers...

http://liveelectronics.musinou.net/StepperMotorsMidiControlled.php

First, you need to print what  Hairless-midi is sending to your Arduino.  And use that to trigger a function that would move your servos. You most not use delay(); if you want to have something responsive.

Look at those references:
https://www.arduino.cc/en/Reference/Serial
https://www.arduino.cc/en/Reference/Millis

I have a project I made that could have up to 32 servos controlled by MIDI, and I used a Teensy and a SSC-32.  The Teensy allows you to build a MIDI instrument relatively flawlessly.You would just plug your homemade interface and your computer would see it like any MIDI instrument, and it would work directly in Live without need for Max4Live or Hairless.  If you are using your setup for live performances or installation, I would advise such setup.
https://www.youtube.com/watch?v=zMy7sFLJ1l0

The SSC-32 is kind of an old board, so I did not make a HOW TO for that setup.  But I did one for MIDI to stepper motors that is kind of similar on the principle, but, well, it is for steppers...
http://liveelectronics.musinou.net/StepperMotorsMidiControlled.php


Teensy would be better maybe.. And what about the Ableton + Arduino + the callbacks function ? 

http://arduinomidilib.fortyseveneffects.com/a00004.html

Teensy would be better maybe.. And what about the Ableton + Arduino + the callbacks  function ? http://arduinomidilib.fortyseveneffects.com/a00004.html 

The Arduino MIDI library is for MIDI IN, MIDI OUT and MIDI Thru round connectors. Not for USB-MIDI, as far as I can tell.

There is Hiduino, for Arduino UNO or Mega 2560

And if you have a Leornardo, or other TeeOnArdu compatible board, you can use Teensyduino and it would work like a Teensy.

There is  Hiduino, for Arduino UNO or Mega 2560
https://github.com/ddiakopoulos/hiduino

And if you have  a Leornardo, or other TeeOnArdu compatible board, you can use Teensyduino and it would work like a Teensy.


Servo myservo; // create servo object to control a servo

int pos = 0; // variable to store the servo position

// -----------------------------------------------------------------------------

// This function will be automatically called when a NoteOn is received.

// It must be a void-returning function with the correct parameters,

http://arduinomidilib.fortyseveneffects.com/a00022.html

void handleNoteOn(byte channel, byte pitch, byte velocity)

if (pitch == 12) { // pitch 12 corresponds to note C1 (C = 0, and there's 12 halve tones in an octave)

delay(15); // waits 15ms for the servo to reach the position

for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees

void handleNoteOff(byte channel, byte pitch, byte velocity)

// Do something when the note is released.

// Note that NoteOn messages with 0 velocity are interpreted as NoteOffs.

myservo.attach(9); // attaches the servo on pin 9 to the servo object

// Connect the handleNoteOn function to the library,

// so it is called upon reception of a NoteOn.

MIDI.setHandleNoteOn(handleNoteOn); // Put only the name of the function

// Initiate MIDI communications, listen to all channels

// Call MIDI.read the fastest you can for real-time performance.

// There is no need to check if there are messages incoming

// if they are bound to a Callback function.

// The attached method will be called automatically

// when the corresponding message has been received.

#include 
MIDI_CREATE_DEFAULT_INSTANCE();

Servo myservo;  // create servo object to control a servo
// twelve servo objects can be created on most boards

int pos = 0;    // variable to store the servo position

// -----------------------------------------------------------------------------
// This function will be automatically called when a NoteOn is received.
// It must be a void-returning function with the correct parameters,
// see documentation here:
// http://arduinomidilib.fortyseveneffects.com/a00022.html
void handleNoteOn(byte channel, byte pitch, byte velocity)
{

if (pitch == 12) { // pitch 12 corresponds to note C1 (C = 0, and there's 12 halve tones in an octave)
  kickTheDrum();
}

void kickTheDrum() {
    for (pos = 0; pos 
    // in steps of 1 degree
    delay(15);                       // waits 15ms for the servo to reach the position
  }
  for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees
    delay(15);                       // waits 15ms for the servo to reach the position
  }
}

void handleNoteOff(byte channel, byte pitch, byte velocity)
{
    // Do something when the note is released.
    // Note that NoteOn messages with 0 velocity are interpreted as NoteOffs.
}
// -----------------------------------------------------------------------------
void setup()
{

    myservo.attach(9);  // attaches the servo on pin 9 to the servo object

    // Connect the handleNoteOn function to the library,
    // so it is called upon reception of a NoteOn.
    MIDI.setHandleNoteOn(handleNoteOn);  // Put only the name of the function
    // Do the same for NoteOffs
    MIDI.setHandleNoteOff(handleNoteOff);
    // Initiate MIDI communications, listen to all channels
    MIDI.begin(MIDI_CHANNEL_OMNI);
}
void loop()
{
    // Call MIDI.read the fastest you can for real-time performance.
    MIDI.read();
    // There is no need to check if there are messages incoming
    // if they are bound to a Callback function.
    // The attached method will be called automatically
    // when the corresponding message has been received.
}

This code is code with one motor, but you can't use it if you want polyphonic. What you wrote here waits 15ms between each position of the motor and does not do anything while waiting, so if you have another MIDI note coming, when a motor is moving, it is not going to kick.

What I did is using millis() and switch case, as you can see here:

http://playground.arduino.cc/Code/AvoidDelay

https://www.arduino.cc/en/Reference/SwitchCase

This code is code with one motor, but you can't use it if you want polyphonic. What you wrote here waits 15ms between each position of the motor and does not do anything while waiting, so if you have another MIDI note coming, when a motor is moving, it is not going to kick. 

What I did is using millis() and switch case, as you can see here:
http://liveelectronics.musinou.net/StepperMotorsMidiControlled.php

Here some useful references
https://www.arduino.cc/en/Reference/Millis
http://playground.arduino.cc/Code/AvoidDelay
https://www.arduino.cc/en/Reference/SwitchCase


Thanks a lot Musinou. I just bought the x12 Servo shield of Adafruit 

I guess with Ableton+ the Arduino + the shield it could be enough to work?

Thanks a lot Musinou. I just bought the x12 Servo shield of Adafruit https://www.adafruit.com/products/1411
I guess with Ableton+ the Arduino + the shield it could be enough to work?


And TeeOnArdu with Teensiduino would work for a Leonardo

There is Hiduino, for Arduino UNO or Mega 2560
https://github.com/ddiakopoulos/hiduino

And TeeOnArdu with Teensiduino would work for a Leonardo


I'll connect the Adafruit x12 servo shield and control them with Hiduino or the Arduino Midi library 

I have the Uno R3 and the Mega 2560.
I'll connect the Adafruit x12 servo shield and control them with Hiduino or the  Arduino Midi library http://arduinomidilib.fortyseveneffects.com/a00004.html


The Uno R3 might be neater for your shield.

You should not need the Arduino Midi library.

Ableton + Arduino + Servo