83 lines
2.4 KiB
C++
83 lines
2.4 KiB
C++
/*
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Morse Code Beacon
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Test beacon will transmit and wait 30 seconds.
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Beacon will check to see if the channel is clear before it will transmit.
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TO-DO: Radio chip audio AGC too slow in responding to tones, worked around by playing a 6khz tone between actual dits/dahs.
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Should work on adjusting AGC to not require this.
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*/
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#define DDS_REFCLK_DEFAULT 9600
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#include <HamShield.h>
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#define PWM_PIN 3
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#define RESET_PIN A3
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#define SWITCH_PIN 2
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HamShield radio;
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// Run our start up things here
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void setup() {
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// NOTE: if not using PWM out, it should be held low to avoid tx noise
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pinMode(PWM_PIN, OUTPUT);
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digitalWrite(PWM_PIN, LOW);
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// prep the switch
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pinMode(SWITCH_PIN, INPUT_PULLUP);
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// set up the reset control pin
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pinMode(RESET_PIN, OUTPUT);
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digitalWrite(RESET_PIN, HIGH);
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// Set up the serial port at 9600 Baud
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Serial.begin(9600);
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// Send a quick serial string
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Serial.println("HamShield FM Beacon Example Sketch");
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// Query the HamShield for status information
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Serial.print("Radio status: ");
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int result = radio.testConnection();
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Serial.println(result,DEC);
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// Tell the HamShield to start up
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radio.initialize();
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radio.setRfPower(0);
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// Configure the HamShield to transmit and recieve on 446.000MHz
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radio.frequency(438000);
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Serial.println("Radio Configured.");
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}
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void loop() {
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// We'll wait up to 30 seconds for a clear channel, requiring that the channel is clear for 2 seconds before we transmit
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if (radio.waitForChannel(30000,2000,-5)) {
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// If we get here, the channel is clear. Let's print the RSSI to the serial port as well.
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Serial.print("Signal is clear, RSSI: ");
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Serial.println(radio.readRSSI());
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// Start transmitting by putting the radio into transmit mode.
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Serial.print("Transmitting... ");
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radio.setModeTransmit();
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// Send a message out in morse code
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radio.morseOut(" KC7IBT ARDUINO HAMSHIELD");
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// We're done sending the message, set the radio back into recieve mode.
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radio.setModeReceive();
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Serial.println("Done.");
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// Wait a second before we send our beacon again.
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delay(1000);
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} else {
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// If we get here, the channel is busy. Let's also print out the RSSI.
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Serial.print("The channel was busy. Waiting 10 seconds. RSSI: ");
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Serial.println(radio.readRSSI());
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// Wait 10 seconds and check the channel again.
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delay(10000);
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}
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}
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