This prototype lets me test the range of the Xbee under various conditions and provides the bones for many other uses of Xbee as a proximity trigger or alarm, as part of a smart system.
int sensorPin = A0;
int sensorValue = 0;
void setup(){
Serial.begin(9600);
pinMode(13,OUTPUT);
}
void loop(){
if (sensorValue > 200){
if(Serial.available() > 0){
digitalWrite(13,HIGH);
Serial.flush();
delay(100);
Serial.write('d');
Serial.flush();
delay(100);
}
}
else {
digitalWrite(13,LOW);
}
}
/*this sketch is by seamus mccarthy 2011 using bits from examples and
online support communities.
It is meant to help people new to xbee to get started using it in your
own smart systems projects*/
int sensorPin = A0; //Sensor pin (moisture, light, pot etc)
int sensorValue = 0; //Sensor variable
void setup(){
Serial.begin(9600);
pinMode(13,OUTPUT); //LED pin
pinMode(6,OUTPUT); //add a pin for speaker tone
}
void loop(){
if (sensorValue > 200){ //if sensor value is above 200..
if(Serial.available() > 0){ //check if Serial data is available
digitalWrite(13,LOW); //Turn off LED
}
else {
digitalWrite(13,HIGH); //Turn on LED
tone(6, 440, 100); //play A4 note on pin 6 for 100 ms:
tone(6, 1760, 100); //play A6 note on pin 6 for 100 ms:
Serial.flush(); //flush
delay(100); //delay
Serial.write('d'); //send back serial to other unit
Serial.flush(); //flush
delay(100); //delay
}
}
}
// set pitches
#define NOTE_A4 440
#define NOTE_A6 1760
I have included diagrams and schematics for my system. Im not quite sure about the Xbee wiring because I used an Xbee Pro Shield and the Seeeduino Stalker which are set up nicely to run the Xbee. This is a good option for beginners as it will allow you to get set up fast.
void setup(){
Serial.begin(9600);
}
void loop(){
Serial.write('d');
delay(100);
}
#include
Servo myservo;
int pos = 0;
int potpin = 0;
int val;
void setup(){
myservo.attach(9);
Serial.begin(9600);
pinMode(13,OUTPUT);
}
void loop(){
val = analogRead(potpin);
//val = map(val, 0, 1023, 0, 179);
if(Serial.available() > 0 && val > 500){
digitalWrite(13,HIGH);
for(pos = 0; pos < 180; pos += 1) { myservo.write(pos); delay(15); } for(pos = 180; pos>=1; pos-=1)
{
myservo.write(pos);
delay(15);
}
delay(500);
Serial.flush();
}
else {
digitalWrite(13,LOW);
//delay(1000);
}
}
int sensorPin = A0;
int sensorValue = 0;
void setup(){
Serial.begin(9600);
}
void loop(){
sensorValue = analogRead(sensorPin);
if (sensorValue > 200){
Serial.write('d');
delay(100);
}
}
#include
Servo myservo;
int pos = 0;int potpin = 0;int val;
void setup(){myservo.attach(9);Serial.begin(9600);pinMode(13,OUTPUT);}
void loop(){val = analogRead(potpin); //val = map(val, 0, 1023, 0, 179);
if(Serial.available() > 0 && val > 500){digitalWrite(13,HIGH);
for(pos = 0; pos < 180; pos += 1) { myservo.write(pos); delay(15); } for(pos = 180; pos>=1; pos-=1){ myservo.write(pos); delay(15);}delay(500);Serial.flush();}else {digitalWrite(13,LOW);//delay(1000);}}
void setup(){ Serial.begin(9600); }
void loop(){ Serial.write('d') delay(100); }
Serial Receiver Code;
void setup(){ Serial.begin(9600); pinMode(13,OUTPUT); }
void loop(){ if(Serial.available() > 0){ digitalWrite(13,HIGH); delay(100); Serial.flush(); } else { digitalWrite(13,LOW); } }
The statement in the void loop is saying ' if there is any serial data available then turn on pin 13 or else turn pin 13 off'. Serial.flush is included to refresh the system every loop that serial is available so that the availability of serial data is tested freshly each loop.
This system will turn the LED in pin 13 on or off depending on whether the two units are in range of one another or if the sender has been switched off.
At this stage the system is rudimentary RF communication but can be used as a building block for further projects. From here we are able to start adding layers of complexity to the sketch, hardware to the system or new functionalities.
In the next post I will attach an external power source to my Arduino and attempt to measure the accuracy of the range of the Xbee in various conditions.
