[Bell] Added Bell modem example

examples/BellModem/BellModem_Transmit/BellModem_Transmit.ino

@@ -0,0 +1,116 @@
+/*
+   RadioLib Bell Modem Transmit Example
+
+   This example shows how to transmit binary data
+   using audio Bell 202 tones.
+
+   Other implemented Bell modems
+    - Bell 101
+    - Bell 103
+
+   For default module settings, see the wiki page
+   https://github.com/jgromes/RadioLib/wiki/Default-configuration
+
+   For full API reference, see the GitHub Pages
+   https://jgromes.github.io/RadioLib/
+*/
+
+// include the library
+#include <RadioLib.h>
+
+// SX1278 has the following connections:
+// NSS pin:   10
+// DIO0 pin:  2
+// RESET pin: 9
+// DIO1 pin:  3
+SX1278 radio = new Module(10, 2, 9, 3);
+
+// create Bell modem instance using the FSK module
+// this requires connection to the module direct
+// input pin, here connected to Arduino pin 5
+// SX127x/RFM9x:  DIO2
+// RF69:          DIO2
+// SX1231:        DIO2
+// CC1101:        GDO2
+// Si443x/RFM2x:  GPIO
+// SX126x/LLCC68: DIO2 (only devices without TCXO!)
+BellClient bell(&radio, 5);
+
+void setup() {
+  Serial.begin(9600);
+
+  // initialize SX1278 with default settings
+  Serial.print(F("[SX1278] Initializing ... "));
+  int state = radio.beginFSK();
+
+  // when using one of the non-LoRa modules for AFSK
+  // (RF69, CC1101, Si4432 etc.), use the basic begin() method
+  // int state = radio.begin();
+
+  if(state == RADIOLIB_ERR_NONE) {
+    Serial.println(F("success!"));
+  } else {
+    Serial.print(F("failed, code "));
+    Serial.println(state);
+    while(true);
+  }
+
+  // initialize Bell 202 modem
+  Serial.print(F("[Bell 202] Initializing ... "));
+  state = bell.begin(Bell202);
+  if(state == RADIOLIB_ERR_NONE) {
+    Serial.println(F("success!"));
+  } else {
+    Serial.print(F("failed, code "));
+    Serial.println(state);
+    while(true);
+  }
+}
+
+void loop() {
+  Serial.print(F("[Bell 202] Sending data ... "));
+
+  // send out idle condition for 500 ms
+  bell.idle();
+  delay(500);
+
+  // BellClient supports all methods of the Serial class
+
+  // Arduino String class
+  String aStr = "Arduino String";
+  bell.println(aStr);
+
+  // character array (C-String)
+  bell.println("C-String");
+
+  // string saved in flash
+  bell.println(F("Flash String"));
+
+  // character
+  bell.println('c');
+
+  // byte
+  // formatting DEC/HEX/OCT/BIN is supported for
+  // any integer type (byte/int/long)
+  bell.println(255, HEX);
+
+  // integer number
+  int i = 1000;
+  bell.println(i);
+
+  // floating point number
+  float f = -3.1415;
+  bell.println(f, 3);
+
+  // ITA2-encoded string
+  ITA2String str("HELLO WORLD!");
+  bell.print(str);
+
+  // turn the transmitter off
+  bell.standby();
+
+  Serial.println(F("done!"));
+
+  // wait for a second before transmitting again
+  delay(1000);
+}