[RTTY] Updated examples

examples/RTTY/RTTY_Transmit/RTTY_Transmit.ino

@@ -10,13 +10,24 @@
     - SX1231
     - CC1101
     - SX126x
+    - nRF24
+
+   For full API reference, see the GitHub Pages
+   https://jgromes.github.io/RadioLib/
 */
 
 // include the library
 #include <RadioLib.h>
 
-// SX1278 module is in slot A on the shield
-SX1278 fsk = RadioShield.ModuleA;
+// SX1278 has the following connections:
+// NSS pin:   10
+// DIO0 pin:  2
+// DIO1 pin:  3
+SX1278 fsk = new Module(10, 2, 3);
+
+// or using RadioShield
+// https://github.com/jgromes/RadioShield
+//SX1278 fsk = RadioShield.ModuleA;
 
 // create RTTY client instance using the FSK module
 RTTYClient rtty(&fsk);