Hey Guys, after what seemed a million try to make an arduino theremin with two ultrasonic sensor, I found out that I could use the Volume library with the NewPing library without getting an error. What the problem was before, was that I couldn't control volume and get the distance from the ultrasonic sensors at the same time. Some library worked together but the sound was horrible. But I saw on the Newping wiki that we could avoid the vector7 error by modifying the library. I did it. No mistakes while verifying the code.. No arror while televersing. But it doesn't work. I tried some things, like removing the vol.begin() at the beginning, and then I could get the distance but no longer play sound. I've got two grove ultrasonic sensor, one grove speaker, an arduino uno with a grove base shield. Here's my code : #include "Volume.h" // Include the Volume library #include #include #include "rgb_lcd.h" rgb_lcd lcd; Volume vol; const char* noteNames[] = { "Do3", "Re3", "Mi3", "Fa3", "So3", "La3", "Si3", "Do4" }; const int colorR = 55; const int colorG = 255; const int colorB = 200; #define Maxdistance 65 // We set The maximum distance for the ultrasonic sensors #define Do3 261 #define Dod3 277 #define Re3 293 #define Red3 311 #define Mi3 329 #define Fa3 349 #define Fad3 369 #define So3 391 #define Sod3 415 #define La3 440 #define Lad3 466 #define Si3 493 #define Do4 523 // Frequences int note[] = { Do3, Re3, Mi3, Fa3, So3, La3, Si3, Do4 }; NewPing sonar1(2, 2, Maxdistance); NewPing sonar2(4, 4, Maxdistance); void setup() { lcd.begin(16, 2); lcd.setRGB(colorR, colorG, colorB); delay(1000); vol.begin(); Serial.begin(115200); } void loop() { int distance1 = sonar1.ping_cm(); // getting the distances int distance2 = sonar2.ping_cm(); int inote = map(distance1, 0, Maxdistance, 0, 7); uint16_t frequence = note[inote]; uint16_t volume = map(distance2, 0, Maxdistance, 255,0); if (distance2 > Maxdistance || distance1 > Maxdistance || distance2 == 0 || distance1 == 0){ volume = 0; frequence = 0; } vol.tone(frequence, volume); Serial.print(distance1); Serial.print(" "); Serial.println(distance2); lcd.setCursor(0, 0); // Placer le curseur au début lcd.print("Frequence: "); // Texte de la ligne 1 lcd.print(frequence); // Valeur mesurée lcd.print("Hz"); lcd.setCursor(0, 1); lcd.print("Note: "); if (inote >= 0) { lcd.print(noteNames[inote]); } delay(65); }

[image] adrien_candela: the problem was before [image] adrien_candela: No mistakes while verifying the code [image] adrien_candela: But it doesn't work. [image] adrien_candela: modifying the library Sorry but it doesn't make things clear. Please read and use this link: How to get the best out of this forum - Development Tools / IDE 1.x - Arduino Forum Datasheets for the none standard devices and schematics would help a lot.

Sorry, I'll try to make things clearer So first, my problem was when using two ultrasonic sensors and a speaker. I couldn't control the volume and at the same time use the ultrasonic sensors because they are both using the timer two... I was getting a vector7 error (I've tried a lot of different libraries...) But I just found out that the Newping (for ultrasonic sensors) library could avoid the problem. On the wiki you can see that setting "Timer_enabled" to false in the .h file would allow you to get rid of the timer error... But, I've tried it with the volume library from Connor Nishijima and when I'm compiling the code, no more vector7 error. And then transferring it to the Arduino board and nothing worked. And I don't understand why

Ultrasonic theremin

Projects General Guidance

Railroader February 12, 2025, 7:10pm 2

Sorry but it doesn't make things clear.

Please read and use this link: How to get the best out of this forum - Development Tools / IDE 1.x - Arduino Forum

Datasheets for the none standard devices and schematics would help a lot.

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