Added check for -1 in pinMode

src/Module.cpp

@@ -56,7 +56,7 @@ void Module::init(uint8_t interface, uint8_t gpio) {
   // select interface
   switch(interface) {
     case RADIOLIB_USE_SPI:
-      pinMode(_cs, OUTPUT);
+      setPin(_cs, OUTPUT);
       digitalWrite(_cs, HIGH);
       _spi->begin();
       break;
@@ -76,14 +76,14 @@ void Module::init(uint8_t interface, uint8_t gpio) {
     case RADIOLIB_INT_NONE:
       break;
     case RADIOLIB_INT_0:
-      pinMode(_int0, INPUT);
+      setPin(_int0, INPUT);
       break;
     case RADIOLIB_INT_1:
-      pinMode(_int1, INPUT);
+      setPin(_int1, INPUT);
       break;
     case RADIOLIB_INT_BOTH:
-      pinMode(_int0, INPUT);
-      pinMode(_int1, INPUT);
+      setPin(_int0, INPUT);
+      setPin(_int1, INPUT);
       break;
   }
 }
@@ -252,3 +252,9 @@ void Module::SPItransfer(uint8_t cmd, uint8_t reg, uint8_t* dataOut, uint8_t* da
   // end SPI transaction
   _spi->endTransaction();
 }
+
+void Module::setPin(int16_t pin, uint8_t mode) {
+  if(pin != -1) {
+    pinMode(pin, mode);
+  }
+}

src/Module.h

@@ -323,6 +323,8 @@ class Module {
     SPISettings _spiSettings;
 
     uint32_t _ATtimeout = 15000;
+
+    void setPin(int16_t pin, uint8_t mode);
 };
 
 #endif