Mon. 11.05.
Ultrasonic sensors and bluetooth bridge have been delivered. Communication with Arduino is working.
Code:
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/* * 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); } |
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/* * 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); } |
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#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 '.