portduino cannot use this chip yet as it uses an old modified version of radiolib

src/main.cpp

@@ -367,7 +367,7 @@ void setup()
     }
 #endif
 
-#if defined(USE_SX1281)
+#if defined(USE_SX1281) && !defined(ARCH_PORTDUINO)
     if (!rIf) {
         rIf = new SX1281Interface(SX126X_CS, SX126X_DIO1, SX126X_RESET, SX126X_BUSY, SPI);
         if (!rIf->init()) {

src/mesh/SX1281Interface.cpp

@@ -2,8 +2,12 @@
 #include "SX1281Interface.h"
 #include "error.h"
 
+#if !defined(ARCH_PORTDUINO)
+
 SX1281Interface::SX1281Interface(RADIOLIB_PIN_TYPE cs, RADIOLIB_PIN_TYPE irq, RADIOLIB_PIN_TYPE rst, RADIOLIB_PIN_TYPE busy,
                                  SPIClass &spi)
     : SX128xInterface(cs, irq, rst, busy, spi)
 {
-}
+}
+
+#endif

src/mesh/SX1281Interface.h

@@ -5,8 +5,13 @@
 /**
  * Our adapter for SX1281 radios
  */
+
+#if !defined(ARCH_PORTDUINO)
+
 class SX1281Interface : public SX128xInterface<SX1281>
 {
   public:
     SX1281Interface(RADIOLIB_PIN_TYPE cs, RADIOLIB_PIN_TYPE irq, RADIOLIB_PIN_TYPE rst, RADIOLIB_PIN_TYPE busy, SPIClass &spi);
-};
+};
+
+#endif

src/mesh/SX128xInterface.cpp

@@ -2,6 +2,8 @@
 #include "SX128xInterface.h"
 #include "error.h"
 
+#if !defined(ARCH_PORTDUINO)
+
 // Particular boards might define a different max power based on what their hardware can do
 #ifndef SX128X_MAX_POWER
 #define SX128X_MAX_POWER 22
@@ -241,3 +243,5 @@ bool SX128xInterface<T>::sleep()
 
     return true;
 }
+
+#endif

src/mesh/SX128xInterface.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#if !defined(ARCH_PORTDUINO)
+
 #include "RadioLibInterface.h"
 
 /**
@@ -69,3 +71,5 @@ class SX128xInterface : public RadioLibInterface
 
   private:
 };
+
+#endif