Ultrasonic sensor HC-SR04 to MIDI CC issue

[Sdreoos]

Hello everyone, searching for a basic example for a Distance Sensor to MIDI CC I've found this code based on Ultrasonic sensor / NewPing.h librarie, but it generates some errors that I'm not able to solve: any suggestion? Thank you

#include <NewPing.h>
#include <MIDI.h>
MIDI_CREATE_DEFAULT_INSTANCE();

int cc = 0;

NewPing sonar(12,11,30);

void setup(){
Serial.begin(115200);
}

void loop(){
delay(50);
int uS = sonar.ping();

Serial.print(“Time: “);
Serial.print(uS);
Serial.println(” “);

cc = map(uS, 0, 1700, 0, 127);

Serial.print(“CC: “);
Serial.print(cc);
Serial.println(” “);

}

[johnwasser]

It compiles without error for me. What error did you get? Is it a 'File not found" error for NewPing.h or MIDI.h that would indicate that one or both of the libraries have not been installed yet?

[Sdreoos]

Hello John, thank you for your kind willingness actually all libraries are already installed. Please take a look to this log report hoping it would be clear enough about issue.

Ultrasonic_HCSR04_MIDI_CC_2.ino:19: error: stray '\342' in program
 Serial.print(“Time: “);
 ^
Ultrasonic_HCSR04_MIDI_CC_2.ino:19: error: stray '\200' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:19: error: stray '\234' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:19: error: stray '\342' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:19: error: stray '\200' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:19: error: stray '\234' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:21: error: stray '\342' in program
 Serial.println(” “);
 ^
Ultrasonic_HCSR04_MIDI_CC_2.ino:21: error: stray '\200' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:21: error: stray '\235' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:21: error: stray '\342' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:21: error: stray '\200' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:21: error: stray '\234' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:25: error: stray '\342' in program
 Serial.print(“CC: “);
 ^
Ultrasonic_HCSR04_MIDI_CC_2.ino:25: error: stray '\200' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:25: error: stray '\234' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:25: error: stray '\342' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:25: error: stray '\200' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:25: error: stray '\234' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:27: error: stray '\342' in program
 Serial.println(” “);
 ^
Ultrasonic_HCSR04_MIDI_CC_2.ino:27: error: stray '\200' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:27: error: stray '\235' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:27: error: stray '\342' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:27: error: stray '\200' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:27: error: stray '\234' in program
Ultrasonic_HCSR04_MIDI_CC_2.ino:1: error: 'https' does not name a type

 ^
Ultrasonic_HCSR04_MIDI_CC_2.ino:9: error: 'NewPing' does not name a type
 NewPing sonar(12,11,30);
 ^
/Users/lionacid/Documents/Arduino/Ultrasonic_HCSR04_MIDI_CC_2.ino/Ultrasonic_HCSR04_MIDI_CC_2.ino.ino: In function 'void loop()':
Ultrasonic_HCSR04_MIDI_CC_2.ino:17: error: 'sonar' was not declared in this scope
 int uS = sonar.ping();
          ^
Ultrasonic_HCSR04_MIDI_CC_2.ino:19: error: 'Time' was not declared in this scope
 Serial.print(“Time: “);
                 ^
Ultrasonic_HCSR04_MIDI_CC_2.ino:25: error: 'CC' was not declared in this scope
 Serial.print(“CC: “);
                 ^
exit status 1
stray '\342' in program

[johnwasser]

"error: stray '\xxx' in program" means you have characters with values over 127 in your sketch. This often happens when a website or text editor has decided to make your text prettier.

Something has replaced many of the double-quote characters in your sketch with 'fancy quotes'. If you look carefully you will see that the opening quotes and closing quotes look different. Replace every one with a regular double-quote.

There may be other characters that were 'pretified', like using different width spaces or 'non-breaking spaces'. You may have to re-type each line that has a "stray '\xxx' in program" error.

The error messages say that you have 'https' on line 1 of your sketch. You didn't show that part. That bogus line is causing the "#include <NewPing.h>" to fail so you get errors when you try to use names that would have been defined in that file.

[Sdreoos]

got it! Infact it's a copy\past from an http address... the code is loaded now (thank you) though at last it's doesn't work properly as MIDI CC: any advice by you?

[johnwasser]

@Sdreoos

cc = map(uS, 0, 1700, 0, 127);

Serial.print(“CC: “);
Serial.print(cc);
Serial.println(” “);

}

You never actually call the MIDI library to send the message so that would explain why it doesn't do what you want.