Arduino XBee Send/Receive Example

A quick implementation of sending/receiving data via an XBee controller

Usage

Simply download a ZIP of this repository from this link and run the code on your Arduino.

What's going on?

Sending a message

xBee.println("buzzer");

Prints the string to the XBee controller (as opposed to Serial). Using println adds a newline, or '\n' after each message which helps segment messages on the receiving side.

Receiving a message

if (xBee.available() > 0) {
    char c = xBee.read();

    if (isAlphaNumeric(c) || c == ' ') {
        buff = buff + c;
    } else {
        /* Your code goes here */
        buff = "";
    }
}

This reads message data from the XBee controller until we find a character that is not a letter, number, or space (such as a newline, or '\n'). Then we act on it and reset buff to read the next message.

Making a Decision

if (buff.equals("buzzer")) {
    tone(buzzerPin, 1000);
    delay(1000);
    noTone(buzzerPin);
}
else if (buff.equals("led")) {
    digitalWrite(ledPin, HIGH);
    delay(1000);
    digitalWrite(ledPin, LOW);
}

We can compare strings using equals. This returns a boolean for whether or not the strings are the same. There are other functions for comparing characters, splitting strings, etc. that can be found in the String() documentation.

License

TBA