Improve logic

config.h

@@ -46,8 +46,8 @@
 
 // CAD and ISR usage selection
 #ifdef USE_SX126X
-#define CFG_LORA_USE_ISR      false       // true - read incoming data in ISR, false - do not read in ISR
-#define CFG_LORA_USE_CAD      false       // set to true to utilize carrier detection
+#define CFG_LORA_USE_ISR      false       // reading in ISR does not work on sx126x
+#define CFG_LORA_USE_CAD      true        // do not transmit if channel is busy
 #else
 #define CFG_LORA_USE_ISR      true        // true - read incoming data in ISR, false - do not read in ISR
 #define CFG_LORA_USE_CAD      true        // set to true to utilize carrier detection

loraprs_service.cpp

@@ -348,10 +348,14 @@ void Service::loop()
 }
 
 bool Service::isLoraRxBusy() {
-#if defined(USE_RADIOLIB) && !defined(USE_SX126X)
+#ifdef USE_RADIOLIB
+  #ifdef USE_SX126X
+  return config_.LoraUseCad && loraDataAvailable_;
+  #else
   return config_.LoraUseCad && (radio_->getModemStatus() & 0x01); // SX1278_STATUS_SIG_DETECT
+  #endif
 #else
-  return loraDataAvailable_;
+  return false;
 #endif
 }