38 lines
1.0 KiB
Arduino
38 lines
1.0 KiB
Arduino
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/* Fox Hunt */
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#include <HAMShield.h>
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#include <Wire.h>
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// transmit for 1 minute, every 10 minutes
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#define TRANSMITLENGTH 1
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#define INTERVAL 10
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#define RANDOMCHANCE 3
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HAMShield radio;
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void setup() {
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Wire.begin();
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radio.initialize();
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radio.setFrequency(145510);
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radio.setModeReceive();
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}
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void loop() {
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waitMinute(INTERVAL + random(0,RANDOMCHANCE)); // wait before transmitting, randomly up to 3 minutes later
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if(radio.waitForChannel(30000,2000)) { // wait for a clear channel, abort after 30 seconds, wait 2 seconds of dead air for breakers
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radio.setModeTransmit(); // turn on transmit mode
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tone(1000,11,TRANSMITLENGTH * 60 * 1000); // play a long solid tone
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radio.morseOut("1ZZ9ZZ/B FOXHUNT"); // identify the fox hunt transmitter
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radio.setModeReceive(); // turn off the transmit mode
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}
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}
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// a function so we can wait by minutes
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void waitMinute(int period) {
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delay(period * 60 * 1000);
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}
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