HamShield/examples/FMBeacon/FMBeacon.ino

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/*
Morse Code Beacon
Test beacon will transmit and wait 30 seconds.
Beacon will check to see if the channel is clear before it will transmit.
*/
// Include the HamSheild and Wire (I2C) libraries
#include <HamShield.h>
#include <Wire.h>
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#define PWM_PIN 3
#define RESET_PIN A3
#define SWITCH_PIN 2
// Create a new instance of our HamSheild class, called 'radio'
HamShield radio;
// Run our start up things here
void setup() {
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// NOTE: if not using PWM out, it should be held low to avoid tx noise
pinMode(PWM_PIN, OUTPUT);
digitalWrite(PWM_PIN, LOW);
// prep the switch
pinMode(SWITCH_PIN, INPUT_PULLUP);
// set up the reset control pin
pinMode(RESET_PIN, OUTPUT);
digitalWrite(RESET_PIN, HIGH);
// Set up the serial port at 9600 Baud
Serial.begin(9600);
// Send a quick serial string
Serial.println("HamShield FM Beacon Example Sketch");
// Start the Wire (I2C) library
Wire.begin();
// Query the HamShield for status information
Serial.print("Radio status: ");
int result = radio.testConnection();
Serial.println(result,DEC);
// Tell the HamShield to start up
radio.initialize();
radio.setRfPower(0);
// Configure the HamShield to transmit and recieve on 446.000MHz
radio.frequency(145570);
Serial.println("Radio Configured.");
}
void loop() {
// We'll wait up to 30 seconds for a clear channel, requiring that the channel is clear for 2 seconds before we transmit
if (radio.waitForChannel(30000,2000,-5)) {
// If we get here, the channel is clear. Let's print the RSSI to the serial port as well.
Serial.print("Signal is clear, RSSI: ");
Serial.println(radio.readRSSI());
// Start transmitting by putting the radio into transmit mode.
Serial.print("Transmitting... ");
radio.setModeTransmit();
// Send a message out in morse code
radio.morseOut("KC7IBT ARDUINO HAMSHIELD");
// We're done sending the message, set the radio back into recieve mode.
radio.setModeReceive();
Serial.println("Done.");
// Wait 30 seconds before we send our beacon again.
delay(1000);
} else {
// If we get here, the channel is busy. Let's also print out the RSSI.
Serial.print("The channel was busy. Waiting 10 seconds. RSSI: ");
Serial.println(radio.readRSSI());
// Wait 10 seconds and check the channel again.
delay(10000);
}
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}