Firmata connection with Ultrasonic sensor

hello,

i connect ultrasonic sensor arduino openframeworks firmata. pulling code ping , firmata examples. however, reads weird digits "üñýüüüüü" rather distance in inches.

below code , can tell me have done wrong please?

code: [select]



#include <firmata.h> 
 
const int pingpin = 7; 

void setup() 
{ 
    firmata.begin(); 
} 

void loop() 
{ 
   while(firmata.available()) { 
      firmata.processinput(); 
   } 

   firmata.sendanalog(pingpin, computedistance()); 
} 

long computedistance(){ 
 long duration, inches, cm; 
  pinmode(pingpin, output); 
  digitalwrite(pingpin, low); 
  delaymicroseconds(2); 
  digitalwrite(pingpin, high); 
  delaymicroseconds(5); 
  digitalwrite(pingpin, low); 

 
  pinmode(pingpin, input); 
  duration = pulsein(pingpin, high); 

  // convert time distance 
  return microsecondstoinches(duration); 

} 

long microsecondstoinches(long microseconds) 
{ 
  return microseconds / 74 / 2; 
} 

// long microsecondstocentimeters(long microseconds)
// { 
//   return microseconds / 29 / 2; 
// } 



quote

can tell me have done wrong please?

besides crossposting? used firmata.

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