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Mon. 11.05.
Ultrasonic sensors and bluetooth bridge have been delivered. Communication with Arduino is working.
Code:
/*
* code from http://www.robodino.de/2011/12/ultraschall-distanz-sensor-hc-sr04.html
*/
#define trigPin 31
#define echoPin 33
//#define led 11
//#define led2 10
void setup() {
Serial.println("Hello");
Serial.begin (9600);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
// pinMode(led, OUTPUT);
// pinMode(led2, OUTPUT);
}
void loop() {
long duration, distance;
digitalWrite(trigPin, LOW); // Added this line
delayMicroseconds(2); // Added this line
digitalWrite(trigPin, HIGH);
// delayMicroseconds(1000); - Removed this line
delayMicroseconds(10); // Added this line
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration/2) / 29.1;
if (distance < 4) { // This is where the LED On/Off happens
//digitalWrite(led,HIGH); // When the Red condition is met, the Green LED should turn off
//digitalWrite(led2,LOW);
}
else {
//digitalWrite(led,LOW);
//digitalWrite(led2,HIGH);
}
if (distance >= 400 || distance <= 0){
Serial.println("Out of range");
}
else {
Serial.print(distance);
Serial.println(" cm");
}
delay(1);
}
/*
* code from http://www.arduino-hacks.com/adding-bluetooth-capability-project-arduino-hc-06/
*/
char blueToothVal; //value sent over via bluetooth
char lastValue; //stores last state of device (on/off)
void setup()
{
Serial.begin(9600);
pinMode(13,OUTPUT);
}
void loop()
{
if(Serial.available()>0)
{//if there is data being recieved
blueToothVal=Serial.read(); //read it
}
if (blueToothVal=='n')
{//if value from bluetooth serial is n
digitalWrite(13,HIGH); //switch on LED
if (lastValue!='n')
Serial.println(F("LED is on")); //print LED is on
lastValue=blueToothVal;
}
else if (blueToothVal=='f')
{//if value from bluetooth serial is n
digitalWrite(13,LOW); //turn off LED
if (lastValue!='f')
Serial.println(F("LED is off")); //print LED is on
lastValue=blueToothVal;
}
delay(1000);
}
#define trigPin 31
#define echoPin 33
char blueToothVal; //value sent over via bluetooth
void setup()
{
Serial.begin(9600);
//pinMode(13,OUTPUT);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
}
long getDistance() {
long duration, distance;
digitalWrite(13,HIGH); //switch on LED
digitalWrite(trigPin, LOW); // Added this line
delayMicroseconds(2); // Added this line
digitalWrite(trigPin, HIGH);
delayMicroseconds(10); // Added this line
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration/2) / 29.1;
if (distance >= 400 || distance <= 0){
distance = getDistance();
}
return distance;
}
void loop()
{
if(Serial.available()>0)
{
blueToothVal=Serial.read(); //read it
}
if (blueToothVal=='x')
{
Serial.print(getDistance());
Serial.println(" cm");
}
blueToothVal = 'c';
delay(1000);
}
The Bluetooth module is found on the MacBook Pro as HC-06 in the list of available Bluetooth devices. A connection can be established with Code '1234'.
In Terminal a list of all open COM ports can be shown via ' ls /dev/tty.* '.
' /dev/tty.HC-06-DevB ' should be shown in the list. A connection to the module can be established via ' screen /dev/tty.HC-06-DevB '.