Initial commit of Arduino libraries

RadioLib/examples/AFSK/AFSK_External_Radio/AFSK_External_Radio.ino

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+/*
+  RadioLib AFSK External Radio example
+
+  This example shows how to use your Arduino
+  as modulator for an external analogue FM radio.
+  
+  The example sends APRS position reports with
+  audio modulated as AFSK at 1200 baud using
+  Bell 202 tones. However, any other AFSK
+  protocol (RTTY, SSTV, etc.) may be used as well.
+
+  DO NOT transmit in APRS bands unless
+  you have a ham radio license!
+
+  For full API reference, see the GitHub Pages
+  https://jgromes.github.io/RadioLib/
+*/
+
+// include the library
+#include <RadioLib.h>
+
+// create a dummy radio module
+ExternalRadio radio;
+
+// create AFSK client instance using the external radio
+// pin 5 is connected to the radio sound input
+AFSKClient audio(&radio, 5);
+
+// create AX.25 client instance using the AFSK instance
+AX25Client ax25(&audio);
+
+// create APRS client instance using the AX.25 client
+APRSClient aprs(&ax25);
+
+void setup() {
+  Serial.begin(9600);
+
+  // initialize AX.25 client
+  Serial.print(F("[AX.25] Initializing ... "));
+  // source station callsign:     "N7LEM"
+  // source station SSID:         0
+  // preamble length:             8 bytes
+  int16_t state = ax25.begin("N7LEM");
+  if(state == RADIOLIB_ERR_NONE) {
+    Serial.println(F("success!"));
+  } else {
+    Serial.print(F("failed, code "));
+    Serial.println(state);
+    while (true) { delay(10); }
+  }
+
+  // initialize APRS client
+  Serial.print(F("[APRS] Initializing ... "));
+  // symbol:                      '>' (car)
+  state = aprs.begin('>');
+  if(state == RADIOLIB_ERR_NONE) {
+    Serial.println(F("success!"));
+  } else {
+    Serial.print(F("failed, code "));
+    Serial.println(state);
+    while (true) { delay(10); }
+  }
+}
+
+void loop() {
+  Serial.print(F("[APRS] Sending position ... "));
+  
+  // send a location without message or timestamp
+  char destination[] = "N0CALL";
+  char latitude[] = "4911.67N";
+  char longitude[] = "01635.96E";
+  int state = aprs.sendPosition(destination, 0, latitude, longitude);
+  delay(500);
+  
+  // send a location with message and without timestamp
+  char message[] = "I'm here!";
+  state |= aprs.sendPosition(destination, 0, latitude, longitude, message);
+  delay(500);
+  
+  // send a location with message and timestamp
+  char timestamp[] = "093045z";
+  state |= aprs.sendPosition(destination, 0, latitude, longitude, message, timestamp);
+  delay(500);
+
+  if(state == RADIOLIB_ERR_NONE) {
+    Serial.println(F("success!"));
+  } else {
+    Serial.print(F("failed, code "));
+    Serial.println(state);
+  }
+
+  // wait one minute before transmitting again
+  delay(60000);
+}