* added LLCC68 module support

src/helpers/CustomLLCC68.h

@@ -0,0 +1,16 @@
+#pragma once
+
+#include <RadioLib.h>
+
+#define SX126X_IRQ_HEADER_VALID                     0b0000010000  //  4     4     valid LoRa header received
+
+class CustomLLCC68 : public LLCC68 {
+  public:
+    CustomLLCC68(Module *mod) : LLCC68(mod) { }
+
+    bool isReceiving() {
+      uint16_t irq = getIrqStatus();
+      bool hasPreamble = (irq & SX126X_IRQ_HEADER_VALID);
+      return hasPreamble;
+    }
+};