60 lines
1.8 KiB
C++
Executable File
60 lines
1.8 KiB
C++
Executable File
/* Hamshield
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* Example: Fox Hunt
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* Plays a one minute tone at 10-13 minute intervals. Script
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* will check to see if the channel is clear before it will
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* transmit.
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* Connect the HamShield to your Arduino. Screw the antenna
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* into the HamShield RF jack. Connect the Arduino to wall
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* power and then to your computer via USB. To test, set a
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* HandyTalkie to 438MHz. You should hear a one-minute tone
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* followed by a callsign every 10-13 minutes.
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*/
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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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// In milliseconds
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#define TRANSMITLENGTH 60000
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// In minutes
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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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// 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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radio.initialize();
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radio.setRfPower(0);
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radio.frequency(438000);
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radio.setModeReceive();
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}
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void loop() {
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if(radio.waitForChannel(30000,2000, -90)) { // 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(PWM_PIN, 1000, TRANSMITLENGTH); // play a long solid tone
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delay(TRANSMITLENGTH);
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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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waitMinute(INTERVAL + random(0,RANDOMCHANCE)); // wait before transmitting, randomly
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}
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// a function so we can wait by minutes
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void waitMinute(unsigned long period) {
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delay(period * 60 * 1000);
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}
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