Control and monitor the Digitech Brian May Pedal via phone!

A serial interface to the Digitech Brian May Pedal allows you to control and view your selected tone using an Android phone or tablet. Also you can save your tone presets for Queen song in an app.

Mar 28, 2023

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Music

Audio

Components and supplies

Stereo Jack Socket, 6.3mm

USB Cable, USB Type C Plug

Arduino Nano Every

Tools and machines

Soldering kit

Apps and platforms

Arduino IDE 1.8

Serial USB Terminal (for Android)

Project description

Code

Source code

cpp

For Arduino Nano Every

1/*
2 A Serial Monitor for Digitech Brian May Pedal!
3
4 v.1.0
5
6 created 16 May 2023
7  by Carlo Giletto
8
9 * TIP to analog pin 0 // = digital pin 14
10 * RING to analog pin 1 // = digital pin 15
11 *
12*/
13
14const int tip = 0;
15const int ring = 1;
16const int downPin = 15;  
17const int upPin = 8;
18const int modePin = 14;
19
20const int highTS = 300;
21const int diodeTS = 50;
22const int groundTS = 20;
23
24const int green = 1, red = 2, blue = 3;
25const int longPressionTime = 2300;  //long pression time in milliseconds, it should be 3000 ms, value tuned for my pedal
26const int shortPressionTime = 150;
27
28unsigned long downPressedTime = 0;
29unsigned long upPressedTime = 0;
30
31long downPressDuration = 0;
32long upPressDuration = 0;
33
34unsigned long lastDebounceTime = 0;  // the last time the output pin was toggled
35const unsigned long debounceDelay = 30;    // the debounce time; increase if the output flickers
36
37String readString;
38
39int buttonState = 0;
40int lastButtonState = 0;
41int refresh = HIGH;
42
43// default state
44
45int Tone = 1;
46int Mode = red;
47int settedTone = Tone;
48int settedMode = Mode;
49
50
51void setup() {
52
53  Serial.begin(115200);
54
55  Serial.println("Digitech Brian May Display");
56  Serial.println("Version 2.0");
57 
58  toneDown(longPressionTime);
59
60}
61void loop() {
62
63  while (Serial.available()) {
64    delay(3);
65    char c = Serial.read();
66    readString += c;
67  }
68
69  if (readString.length() > 0) {
70    //Serial.println(readString);
71
72    if (readString == "u\n") {
73      toneUp(shortPressionTime);
74    }
75    else if (readString == "d\n") {
76      toneDown(shortPressionTime);
77    }
78    else if (readString == "m\n") {
79      modeToggle();
80    }
81    else if (readString == "ld\n") {
82      toneDown(longPressionTime);
83    }
84    else if (readString == "lu\n") {
85      toneUp(longPressionTime);
86    }
87    else if (readString == "1g\n") {
88      settedTone = 1;
89      settedMode = green;
90    }
91    else if (readString == "2g\n") {
92      settedTone = 2;
93      settedMode = green;
94    }
95    else if (readString == "3g\n") {
96      settedTone = 3;
97      settedMode = green;
98    }
99    else if (readString == "4g\n") {
100      settedTone = 4;
101      settedMode = green;
102    }
103    else if (readString == "5g\n") {
104      settedTone = 5;
105      settedMode = green;
106    }
107    else if (readString == "6g\n") {
108      settedTone = 6;
109      settedMode = green;
110    }
111    else if (readString == "7g\n") {
112      settedTone = 7;
113      settedMode = green;
114    }
115    else if (readString == "1r\n") {
116      settedTone = 1;
117      settedMode = red;
118    }
119    else if (readString == "2r\n") {
120      settedTone = 2;
121      settedMode = red;
122    }
123    else if (readString == "3r\n") {
124      settedTone = 3;
125      settedMode = red;
126    }
127    else if (readString == "4r\n") {
128      settedTone = 4;
129      settedMode = red;
130    }
131    else if (readString == "5r\n") {
132      settedTone = 5;
133      settedMode = red;
134    }
135    else if (readString == "6r\n") {
136      settedTone = 6;
137      settedMode = red;
138    }
139    else if (readString == "7r\n") {
140      settedTone = 7;
141      settedMode = red;
142    }
143    else{
144      Serial.println();
145      Serial.println();
146      Serial.println("Help: m = toggle mode, u = up, d = down,");
147      Serial.println("ld = long pression down, lu = long pression up");
148      Serial.println("1r = Tone 1 Mode Red, 2g = Tone 2 green, etc...");
149     }
150
151    readString = "";
152  }
153
154  if (settedTone < Tone) {
155    refresh = HIGH;
156    for (int i = Tone - settedTone; i > 0; i--) {
157      toneDown(shortPressionTime);
158    }
159  }
160  if (settedTone > Tone) {
161    refresh = HIGH;
162    for (int i = settedTone - Tone; i > 0; i--) {
163      toneUp(shortPressionTime);
164    }
165  }
166
167  if (Mode != settedMode) {
168    modeToggle();
169    refresh = HIGH;
170  }
171
172  int reading = buttons();
173
174  if (reading != lastButtonState) {
175    lastDebounceTime = millis();
176  }
177
178  if ((millis() - lastDebounceTime) > debounceDelay) {
179    if (reading != buttonState) {
180      buttonState = reading;
181      if (buttonState == 0) {
182        //Serial.println("Buttons Released");
183      }
184      if (buttonState == 1) {
185        //Serial.println("MODE Pressed");
186        refresh = HIGH;
187        if (Mode == green) {
188          //backLightRed(redBrightness);
189          Mode = red;
190          settedMode = Mode;
191        } else {
192          //backLightGreen(greenBrightness);
193          Mode = green;
194          settedMode = Mode;
195        }
196      }
197      if (buttonState == 2) {
198        //Serial.println("DOWN Pressed");
199        downPressedTime = millis();
200        if (Tone > 1) {
201          refresh = HIGH;
202          Tone = Tone - 1;
203          settedTone = Tone;
204        }
205      }
206      if (buttonState == 3) {
207        //Serial.println("UP Pressed");
208        upPressedTime = millis();
209        if (Tone < 7) {
210          refresh = HIGH;
211          Tone = Tone + 1;
212          settedTone = Tone;
213        }
214      }
215    }
216  }
217
218  downPressDuration = millis() - downPressedTime;
219  if ((buttonState == 2) && (downPressDuration > longPressionTime)) {
220    if (Tone > 1) {
221      Tone = 1;
222      settedTone = Tone;
223      refresh = HIGH;
224    }
225  }
226  upPressDuration = millis() - upPressedTime;
227  if ((buttonState == 3) && (upPressDuration > longPressionTime)) {
228    if (Tone < 7) {
229      Tone = 7;
230      settedTone = Tone;
231      refresh = HIGH;
232    }
233  }
234
235  if (refresh == HIGH) {
236
237    Serial.println();
238    Serial.println();    
239
240    //Serial.print("Tone: ");
241    Serial.print(Tone);
242    //Serial.print(" Mode: ");
243    if (Mode == 1)
244      Serial.print(" GREEN - ");
245    else
246      Serial.print(" RED - ");
247
248    if (Mode == green) {
249      if (Tone == 1)
250        display1Green();
251      if (Tone == 2)
252        display2Green();
253      if (Tone == 3)
254        display3Green();
255      if (Tone == 4)
256        display4Green();
257      if (Tone == 5)
258        display5Green();
259      if (Tone == 6)
260        display6Green();
261      if (Tone == 7)
262        display7Green();
263    }
264
265    if (Mode == red) {
266      if (Tone == 1)
267        display1Red();
268      if (Tone == 2)
269        display2Red();
270      if (Tone == 3)
271        display3Red();
272      if (Tone == 4)
273        display4Red();
274      if (Tone == 5)
275        display5Red();
276      if (Tone == 6)
277        display6Red();
278      if (Tone == 7)
279        display7Red();
280    }
281
282    refresh = LOW;
283  }
284  lastButtonState = reading;
285}
286
287int buttons() {
288  if ((analogRead(tip) > highTS) && (analogRead(ring) > highTS)) {
289    return 0;
290  }
291  if ((analogRead(tip) < groundTS) && (analogRead(ring) > highTS)) {
292    return 1;
293  }
294  if ((analogRead(ring) < groundTS) && (analogRead(tip) > highTS)) {
295    return 2;
296  }
297  if ((analogRead(tip) < highTS) && (analogRead(tip) > diodeTS) && (analogRead(ring) < highTS) && (analogRead(ring) > diodeTS)) {
298    return 3;
299  } else {
300    return 4;
301  }
302}
303
304void display1Green() {
305  Serial.println("Keep Yourself Alive");
306  Serial.println("Intro with Tape Flanger");  
307  Serial.println("Tape Flanger Amount / Midrange");
308}
309
310void display2Green() {
311  Serial.println(" Bohemian  Rhapsody");
312  Serial.println("First Solo");
313  Serial.println("No Function / Midrange");
314}
315
316void display3Green() {
317  Serial.println("Tie Your Mother Down");
318  Serial.println("Intro");
319  Serial.println("No Function / Midrange");
320}
321
322void display4Green() {
323  Serial.println("We Will Rock You");  
324  Serial.println("Solo");
325  Serial.println("Phaser Amount / Phaser Speed");
326}
327
328void display5Green() {
329  Serial.println(" Crazy Little Thing Called  Love");
330  Serial.println("Intro");
331  Serial.println("No Function / Reverb Level");
332}
333
334void display6Green() {
335  Serial.println("Brighton Rock Solo - Live");  
336  Serial.println("Delay (three amps) & Tight Chorus");
337  Serial.println("Delay Amount / Delay Time");
338}
339
340void display7Green() {
341  Serial.println("Deacy Amp");  
342  Serial.println("Deacy Unprocessed");
343  Serial.println("No Function / Midrange");
344}
345
346void display1Red() {
347  Serial.println("Keep Yourself Alive");
348  Serial.println("Solo with Tape Flanger");
349  Serial.println("Tape Flanger / Midrange");
350}
351
352void display2Red() {
353  Serial.println("Bohemian Rhapsody");
354  Serial.println("Rhythm & finale orchestral Fanfare");  
355  Serial.println("Cross fade to Deacy / Midrange");
356}
357
358void display3Red() {
359  Serial.println("Tie Your Mother Down");
360  Serial.println("Solo");
361  Serial.println("No Function / Midrange");
362}
363
364void display4Red() {
365  Serial.println("We Are The Champions");
366  Serial.println("Solo");  
367  Serial.println("Phaser Amount / Phaser Speed");
368}
369
370void display5Red() {
371  Serial.println("Crazy Little Thing Called Love");
372  Serial.println("Solo");
373  Serial.println("No Function / Reverb Level");
374}
375
376void display6Red() {
377  Serial.println("Brighton Rock - Solo");
378  Serial.println("Orchestral Harmonizer with three part harmony");  
379  Serial.println("Minor to Major / Pitch Blend");
380}
381
382void display7Red() {
383  Serial.println("A Winter's Tale");
384  Serial.println("Solo");
385  Serial.println("No Function / Effect level - Reverb & Delay");
386}
387
388void modeToggle() {
389  pinMode(modePin, OUTPUT);
390  digitalWrite(modePin, LOW);
391  delay(shortPressionTime);
392  pinMode(modePin, INPUT);
393  refresh = HIGH;
394  if (Mode == green) {
395    //backLightRed(redBrightness);
396    Mode = red;
397    settedMode = Mode;
398  } else {
399    //backLightGreen(greenBrightness);
400    Mode = green;
401    settedMode = Mode;
402  }
403  delay(shortPressionTime);
404}
405
406void toneDown(int PressionTime) {
407  pinMode(downPin, OUTPUT);
408  digitalWrite(downPin, LOW);
409  delay(PressionTime);
410  pinMode(downPin, INPUT);
411  if (Tone > 1) {
412    refresh = HIGH;
413    if (PressionTime < longPressionTime) {
414      Tone = Tone - 1;
415      settedTone = Tone;
416    } else {
417      Tone = 1;
418      settedTone = Tone;
419    }
420  }
421  delay(shortPressionTime);
422}
423
424void toneUp(int PressionTime) {
425  pinMode(modePin, OUTPUT);
426  pinMode(downPin, OUTPUT);
427  digitalWrite(downPin, LOW);
428  digitalWrite(modePin, LOW);
429  //pinMode(upPin, OUTPUT);
430  //digitalWrite(upPin,LOW);
431  delay(PressionTime);
432  pinMode(modePin, INPUT);
433  pinMode(downPin, INPUT);
434  //pinMode(upPin, INPUT);
435  if (Tone < 7) {
436    refresh = HIGH;
437    if (PressionTime < longPressionTime) {
438      Tone = Tone + 1;
439      settedTone = Tone;
440    } else {
441      Tone = 7;
442      settedTone = Tone;
443    }
444  }
445  delay(shortPressionTime);
446}

/*
 A Serial Monitor for Digitech Brian May Pedal!

 v.1.0

 created 16 May 2023
  by Carlo Giletto

 * TIP to analog pin 0 // = digital pin 14
 * RING to analog pin 1 // = digital pin 15
 *
*/

const int tip = 0;
const int ring = 1;
const int downPin = 15;  
const int upPin = 8;
const int modePin = 14;

const int highTS = 300;
const int diodeTS = 50;
const int groundTS = 20;

const int green = 1, red = 2, blue = 3;
const int longPressionTime = 2300;  //long pression time in milliseconds, it should be 3000 ms, value tuned for my pedal
const int shortPressionTime = 150;

unsigned long downPressedTime = 0;
unsigned long upPressedTime = 0;

long downPressDuration = 0;
long upPressDuration = 0;

unsigned long lastDebounceTime = 0;  // the last time the output pin was toggled
const unsigned long debounceDelay = 30;    // the debounce time; increase if the output flickers

String readString;

int buttonState = 0;
int lastButtonState = 0;
int refresh = HIGH;

// default state

int Tone = 1;
int Mode = red;
int settedTone = Tone;
int settedMode = Mode;


void setup() {

  Serial.begin(115200);

  Serial.println("Digitech Brian May Display");
  Serial.println("Version 2.0");
 
  toneDown(longPressionTime);

}
void loop() {

  while (Serial.available()) {
    delay(3);
    char c = Serial.read();
    readString += c;
  }

  if (readString.length() > 0) {
    //Serial.println(readString);

    if (readString == "u\n") {
      toneUp(shortPressionTime);
    }
    else if (readString == "d\n") {
      toneDown(shortPressionTime);
    }
    else if (readString == "m\n") {
      modeToggle();
    }
    else if (readString == "ld\n") {
      toneDown(longPressionTime);
    }
    else if (readString == "lu\n") {
      toneUp(longPressionTime);
    }
    else if (readString == "1g\n") {
      settedTone = 1;
      settedMode = green;
    }
    else if (readString == "2g\n") {
      settedTone = 2;
      settedMode = green;
    }
    else if (readString == "3g\n") {
      settedTone = 3;
      settedMode = green;
    }
    else if (readString == "4g\n") {
      settedTone = 4;
      settedMode = green;
    }
    else if (readString == "5g\n") {
      settedTone = 5;
      settedMode = green;
    }
    else if (readString == "6g\n") {
      settedTone = 6;
      settedMode = green;
    }
    else if (readString == "7g\n") {
      settedTone = 7;
      settedMode = green;
    }
    else if (readString == "1r\n") {
      settedTone = 1;
      settedMode = red;
    }
    else if (readString == "2r\n") {
      settedTone = 2;
      settedMode = red;
    }
    else if (readString == "3r\n") {
      settedTone = 3;
      settedMode = red;
    }
    else if (readString == "4r\n") {
      settedTone = 4;
      settedMode = red;
    }
    else if (readString == "5r\n") {
      settedTone = 5;
      settedMode = red;
    }
    else if (readString == "6r\n") {
      settedTone = 6;
      settedMode = red;
    }
    else if (readString == "7r\n") {
      settedTone = 7;
      settedMode = red;
    }
    else{
      Serial.println();
      Serial.println();
      Serial.println("Help: m = toggle mode, u = up, d = down,");
      Serial.println("ld = long pression down, lu = long pression up");
      Serial.println("1r = Tone 1 Mode Red, 2g = Tone 2 green, etc...");
     }

    readString = "";
  }

  if (settedTone < Tone) {
    refresh = HIGH;
    for (int i = Tone - settedTone; i > 0; i--) {
      toneDown(shortPressionTime);
    }
  }
  if (settedTone > Tone) {
    refresh = HIGH;
    for (int i = settedTone - Tone; i > 0; i--) {
      toneUp(shortPressionTime);
    }
  }

  if (Mode != settedMode) {
    modeToggle();
    refresh = HIGH;
  }

  int reading = buttons();

  if (reading != lastButtonState) {
    lastDebounceTime = millis();
  }

  if ((millis() - lastDebounceTime) > debounceDelay) {
    if (reading != buttonState) {
      buttonState = reading;
      if (buttonState == 0) {
        //Serial.println("Buttons Released");
      }
      if (buttonState == 1) {
        //Serial.println("MODE Pressed");
        refresh = HIGH;
        if (Mode == green) {
          //backLightRed(redBrightness);
          Mode = red;
          settedMode = Mode;
        } else {
          //backLightGreen(greenBrightness);
          Mode = green;
          settedMode = Mode;
        }
      }
      if (buttonState == 2) {
        //Serial.println("DOWN Pressed");
        downPressedTime = millis();
        if (Tone > 1) {
          refresh = HIGH;
          Tone = Tone - 1;
          settedTone = Tone;
        }
      }
      if (buttonState == 3) {
        //Serial.println("UP Pressed");
        upPressedTime = millis();
        if (Tone < 7) {
          refresh = HIGH;
          Tone = Tone + 1;
          settedTone = Tone;
        }
      }
    }
  }

  downPressDuration = millis() - downPressedTime;
  if ((buttonState == 2) && (downPressDuration > longPressionTime)) {
    if (Tone > 1) {
      Tone = 1;
      settedTone = Tone;
      refresh = HIGH;
    }
  }
  upPressDuration = millis() - upPressedTime;
  if ((buttonState == 3) && (upPressDuration > longPressionTime)) {
    if (Tone < 7) {
      Tone = 7;
      settedTone = Tone;
      refresh = HIGH;
    }
  }

  if (refresh == HIGH) {

    Serial.println();
    Serial.println();    

    //Serial.print("Tone: ");
    Serial.print(Tone);
    //Serial.print(" Mode: ");
    if (Mode == 1)
      Serial.print(" GREEN - ");
    else
      Serial.print(" RED - ");

    if (Mode == green) {
      if (Tone == 1)
        display1Green();
      if (Tone == 2)
        display2Green();
      if (Tone == 3)
        display3Green();
      if (Tone == 4)
        display4Green();
      if (Tone == 5)
        display5Green();
      if (Tone == 6)
        display6Green();
      if (Tone == 7)
        display7Green();
    }

    if (Mode == red) {
      if (Tone == 1)
        display1Red();
      if (Tone == 2)
        display2Red();
      if (Tone == 3)
        display3Red();
      if (Tone == 4)
        display4Red();
      if (Tone == 5)
        display5Red();
      if (Tone == 6)
        display6Red();
      if (Tone == 7)
        display7Red();
    }

    refresh = LOW;
  }
  lastButtonState = reading;
}

int buttons() {
  if ((analogRead(tip) > highTS) && (analogRead(ring) > highTS)) {
    return 0;
  }
  if ((analogRead(tip) < groundTS) && (analogRead(ring) > highTS)) {
    return 1;
  }
  if ((analogRead(ring) < groundTS) && (analogRead(tip) > highTS)) {
    return 2;
  }
  if ((analogRead(tip) < highTS) && (analogRead(tip) > diodeTS) && (analogRead(ring) < highTS) && (analogRead(ring) > diodeTS)) {
    return 3;
  } else {
    return 4;
  }
}

void display1Green() {
  Serial.println("Keep Yourself Alive");
  Serial.println("Intro with Tape Flanger");  
  Serial.println("Tape Flanger Amount / Midrange");
}

void display2Green() {
  Serial.println(" Bohemian  Rhapsody");
  Serial.println("First Solo");
  Serial.println("No Function / Midrange");
}

void display3Green() {
  Serial.println("Tie Your Mother Down");
  Serial.println("Intro");
  Serial.println("No Function / Midrange");
}

void display4Green() {
  Serial.println("We Will Rock You");  
  Serial.println("Solo");
  Serial.println("Phaser Amount / Phaser Speed");
}

void display5Green() {
  Serial.println(" Crazy Little Thing Called  Love");
  Serial.println("Intro");
  Serial.println("No Function / Reverb Level");
}

void display6Green() {
  Serial.println("Brighton Rock Solo - Live");  
  Serial.println("Delay (three amps) & Tight Chorus");
  Serial.println("Delay Amount / Delay Time");
}

void display7Green() {
  Serial.println("Deacy Amp");  
  Serial.println("Deacy Unprocessed");
  Serial.println("No Function / Midrange");
}

void display1Red() {
  Serial.println("Keep Yourself Alive");
  Serial.println("Solo with Tape Flanger");
  Serial.println("Tape Flanger / Midrange");
}

void display2Red() {
  Serial.println("Bohemian Rhapsody");
  Serial.println("Rhythm & finale orchestral Fanfare");  
  Serial.println("Cross fade to Deacy / Midrange");
}

void display3Red() {
  Serial.println("Tie Your Mother Down");
  Serial.println("Solo");
  Serial.println("No Function / Midrange");
}

void display4Red() {
  Serial.println("We Are The Champions");
  Serial.println("Solo");  
  Serial.println("Phaser Amount / Phaser Speed");
}

void display5Red() {
  Serial.println("Crazy Little Thing Called Love");
  Serial.println("Solo");
  Serial.println("No Function / Reverb Level");
}

void display6Red() {
  Serial.println("Brighton Rock - Solo");
  Serial.println("Orchestral Harmonizer with three part harmony");  
  Serial.println("Minor to Major / Pitch Blend");
}

void display7Red() {
  Serial.println("A Winter's Tale");
  Serial.println("Solo");
  Serial.println("No Function / Effect level - Reverb & Delay");
}

void modeToggle() {
  pinMode(modePin, OUTPUT);
  digitalWrite(modePin, LOW);
  delay(shortPressionTime);
  pinMode(modePin, INPUT);
  refresh = HIGH;
  if (Mode == green) {
    //backLightRed(redBrightness);
    Mode = red;
    settedMode = Mode;
  } else {
    //backLightGreen(greenBrightness);
    Mode = green;
    settedMode = Mode;
  }
  delay(shortPressionTime);
}

void toneDown(int PressionTime) {
  pinMode(downPin, OUTPUT);
  digitalWrite(downPin, LOW);
  delay(PressionTime);
  pinMode(downPin, INPUT);
  if (Tone > 1) {
    refresh = HIGH;
    if (PressionTime < longPressionTime) {
      Tone = Tone - 1;
      settedTone = Tone;
    } else {
      Tone = 1;
      settedTone = Tone;
    }
  }
  delay(shortPressionTime);
}

void toneUp(int PressionTime) {
  pinMode(modePin, OUTPUT);
  pinMode(downPin, OUTPUT);
  digitalWrite(downPin, LOW);
  digitalWrite(modePin, LOW);
  //pinMode(upPin, OUTPUT);
  //digitalWrite(upPin,LOW);
  delay(PressionTime);
  pinMode(modePin, INPUT);
  pinMode(downPin, INPUT);
  //pinMode(upPin, INPUT);
  if (Tone < 7) {
    refresh = HIGH;
    if (PressionTime < longPressionTime) {
      Tone = Tone + 1;
      settedTone = Tone;
    } else {
      Tone = 7;
      settedTone = Tone;
    }
  }
  delay(shortPressionTime);
}

Downloadable files

Configuration for Serial USB Terminal App

Configuration of Serial and song presets

file.None

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cgiletto

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