 # make calculation off of data sent by Ping )) sensor

i have a ping )) sensor set up...and i want to simply count the number of times that the reading goes above X inches and Y centimeters...here is the code i'm using now:

const int pingPin = 7;

void setup() { // initialize serial communication: Serial.begin(9600); }

void loop() { // establish variables for duration of the ping, // and the distance result in inches and centimeters: long duration, inches, cm;

// The PING))) is triggered by a HIGH pulse of 2 or more microseconds. // Give a short LOW pulse beforehand to ensure a clean HIGH pulse: pinMode(pingPin, OUTPUT); digitalWrite(pingPin, LOW); delayMicroseconds(2); digitalWrite(pingPin, HIGH); delayMicroseconds(5); digitalWrite(pingPin, LOW);

// The same pin is used to read the signal from the PING))): a HIGH // pulse whose duration is the time (in microseconds) from the sending // of the ping to the reception of its echo off of an object. pinMode(pingPin, INPUT); duration = pulseIn(pingPin, HIGH);

// convert the time into a distance inches = microsecondsToInches(duration); cm = microsecondsToCentimeters(duration);

Serial.print(inches); Serial.print("."); Serial.print(cm); Serial.print(""); Serial.println();

delay(10); }

long microsecondsToInches(long microseconds) { // According to Parallax's datasheet for the PING))), there are // 73.746 microseconds per inch (i.e. sound travels at 1130 feet per // second). This gives the distance travelled by the ping, outbound // and return, so we divide by 2 to get the distance of the obstacle. // See: http://www.parallax.com/dl/docs/prod/acc/28015-PING-v1.3.pdf return microseconds / 74 / 2; }

long microsecondsToCentimeters(long microseconds) { // The speed of sound is 340 m/s or 29 microseconds per centimeter. // The ping travels out and back, so to find the distance of the // object we take half of the distance travelled. return microseconds / 29 / 2; }

I see the code that prints out the values but I don't see any attempt to compare those values to anything. Perhaps that should be your next step.

i want to simply count the number of times that the reading goes above X inches and Y centimeters

translates exact to

``````if (inches > X && cm > Y) count++;
``````

but I assume this is not exact what you need ;)

how this code displays the distance?

nabeel4sf: how this code displays the distance?

``````  duration = pulseIn(pingPin, HIGH);

// convert the time into a distance
inches = microsecondsToInches(duration);

Serial.print(inches);
``````