Hi guys,
I am new to Arduino and I need some help with the mini project I am doing.
I have an ultrasonic sensor(SFR ranger) & a flex sensor.
I am able to get the out put of the both sensors individually now( one at a time). But I cannot get both sensor to work together and display the data in one serial monitor as I wanted.
Please advise me on how to get it be done
Below are the individual sensor codes that I am using now
SFR ranger codes:
const int trigPin = 2;
const int echoPin = 4;
int count=0;
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 sensor is triggered by a HIGH pulse of 10 or more microseconds.
// Give a short LOW pulse beforehand to ensure a clean HIGH pulse
pinMode(trigPin, OUTPUT);
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
// Read the signal from the sensor: 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(echoPin, INPUT);
duration = pulseIn(echoPin, HIGH);
// convert the time into a distance
inches = microsecondsToInches(duration);
cm = microsecondsToCentimeters(duration);
Serial.print(cm);
Serial.print(“cm”);
Serial.println();
if (cm <=4)
{
count++;
Serial.print("COUNT: ");
Serial.println(count);
Serial.println();
}
delay(500);
}
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;
}
Flex sensor code
const int FLEX_PIN = A0; // Pin connected to voltage divider output
// Measure the voltage at 5V and the actual resistance of your
// 10k resistor, and enter them below:
const float VCC = 4.98; // Measured voltage of Ardunio 5V line
const float R_DIV = 10500.0; // Measured resistance of 3.3k resistor
// Upload the code, then try to adjust these values to more
// accurately calculate bend degree.
const float STRAIGHT_RESISTANCE = 9800.0; // resistance when straight
const float BEND_RESISTANCE = 20000.0; // resistance at 90 deg
void setup()
{
Serial.begin(9600);
pinMode(FLEX_PIN, INPUT);
}
void loop()
{
// Read the ADC, and calculate voltage and resistance from it
int flexADC = analogRead(FLEX_PIN);
float flexV = flexADC * VCC / 1023.0;
float flexR = R_DIV * (VCC / flexV - 1.0);
Serial.println(“Resistance: " + String(flexR) + " ohms”);
// Use the calculated resistance to estimate the sensor’s
// bend angle:
float angle = map(flexR, STRAIGHT_RESISTANCE, BEND_RESISTANCE,
0, 90.0);
Serial.println(“Bend: " + String(angle) + " degrees”);
Serial.println();
delay(500);
}
I needed it quite urgently and really appreciate the help
Thanks guys``
