diff --git a/libraries/HeatpumpIR/CarrierHeatpumpIR.cpp b/libraries/HeatpumpIR/CarrierHeatpumpIR.cpp
index 55fe332..026c1aa 100644
--- a/libraries/HeatpumpIR/CarrierHeatpumpIR.cpp
+++ b/libraries/HeatpumpIR/CarrierHeatpumpIR.cpp
@@ -12,6 +12,9 @@ CarrierHeatpumpIR::CarrierHeatpumpIR() : HeatpumpIR()
 
 void CarrierHeatpumpIR::send(IRSender& IR, byte powerModeCmd, byte operatingModeCmd, byte fanSpeedCmd, byte temperatureCmd, byte swingVCmd, byte swingHCmd)
 {
+  (void)swingVCmd;
+  (void)swingHCmd;
+
   // Sensible defaults for the heat pump mode
 
   byte operatingMode = CARRIER_AIRCON1_MODE_HEAT;
diff --git a/libraries/HeatpumpIR/HeatpumpIR.cpp b/libraries/HeatpumpIR/HeatpumpIR.cpp
index a741ea4..7f7f60a 100644
--- a/libraries/HeatpumpIR/HeatpumpIR.cpp
+++ b/libraries/HeatpumpIR/HeatpumpIR.cpp
@@ -5,7 +5,7 @@ HeatpumpIR::HeatpumpIR()
 }
 
 // This is a virtual function, i.e. never called
-void HeatpumpIR::send(IRSender& IR, byte powerModeCmd, byte operatingModeCmd, byte fanSpeedCmd, byte temperatureCmd, byte swingVCmd, byte swingHCmd)
+void HeatpumpIR::send(IRSender&, byte, byte, byte, byte, byte, byte)
 {
 }
 
diff --git a/libraries/HeatpumpIR/HisenseHeatpumpIR.cpp b/libraries/HeatpumpIR/HisenseHeatpumpIR.cpp
index 542ceb9..5f7dd85 100644
--- a/libraries/HeatpumpIR/HisenseHeatpumpIR.cpp
+++ b/libraries/HeatpumpIR/HisenseHeatpumpIR.cpp
@@ -12,6 +12,9 @@ HisenseHeatpumpIR::HisenseHeatpumpIR() : HeatpumpIR()
 
 void HisenseHeatpumpIR::send(IRSender& IR, byte powerModeCmd, byte operatingModeCmd , byte fanSpeedCmd , byte temperatureCmd , byte swingVCmd , byte swingHCmd )
 {
+  (void)swingVCmd;
+  (void)swingHCmd;
+
   // Sensible defaults for the heat pump mode
 
   byte powerMode = HISENSE_AIRCON1_POWER_ON;
@@ -47,7 +50,7 @@ void HisenseHeatpumpIR::send(IRSender& IR, byte powerModeCmd, byte operatingMode
         operatingMode = HISENSE_AIRCON1_MODE_FAN;
         if ( fanSpeedCmd == FAN_AUTO ) {
           fanSpeedCmd = FAN_1; // Fan speed cannot be 'AUTO' in FAN mode
-		  temperatureCmd = 25; // Fixed temperature FAN mode
+          temperatureCmd = 25; // Fixed temperature FAN mode
         }
         break;
     }
@@ -66,7 +69,7 @@ void HisenseHeatpumpIR::send(IRSender& IR, byte powerModeCmd, byte operatingMode
       break;
     case FAN_3:
       fanSpeed = HISENSE_AIRCON1_FAN3;
-	  break;
+      break;
   }
 
   if ( temperatureCmd > 17 && temperatureCmd < 33)
@@ -81,6 +84,9 @@ void HisenseHeatpumpIR::send(IRSender& IR, byte powerModeCmd, byte operatingMode
 // Send the Hisense code
 void HisenseHeatpumpIR::sendHisense(IRSender& IR, byte powerMode, byte operatingMode, byte fanSpeed, byte temperature, byte swingV ,byte swingH)
 {
+  (void)swingV;
+  (void)swingH;
+
   byte HisenseTemplate[] = { 0x87, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00,    // Header byte 0-1
                              0x00, 0x00, 0x00, 0x0C, 0x00, 0x00, 0x00 };  //
 
diff --git a/libraries/HeatpumpIR/MideaHeatpumpIR.cpp b/libraries/HeatpumpIR/MideaHeatpumpIR.cpp
index faec8ed..04e709d 100644
--- a/libraries/HeatpumpIR/MideaHeatpumpIR.cpp
+++ b/libraries/HeatpumpIR/MideaHeatpumpIR.cpp
@@ -12,6 +12,9 @@ MideaHeatpumpIR::MideaHeatpumpIR() : HeatpumpIR()
 
 void MideaHeatpumpIR::send(IRSender& IR, byte powerModeCmd, byte operatingModeCmd, byte fanSpeedCmd, byte temperatureCmd, byte swingVCmd, byte swingHCmd)
 {
+  (void)swingVCmd;
+  (void)swingHCmd;
+
   // Sensible defaults for the heat pump mode
   byte operatingMode = MIDEA_AIRCON1_MODE_HEAT;
   byte fanSpeed = MIDEA_AIRCON1_FAN_AUTO;
diff --git a/libraries/HeatpumpIR/SamsungHeatpumpIR.cpp b/libraries/HeatpumpIR/SamsungHeatpumpIR.cpp
index 274504f..b932baf 100644
--- a/libraries/HeatpumpIR/SamsungHeatpumpIR.cpp
+++ b/libraries/HeatpumpIR/SamsungHeatpumpIR.cpp
@@ -12,6 +12,9 @@ SamsungHeatpumpIR::SamsungHeatpumpIR() : HeatpumpIR()
 
 void SamsungHeatpumpIR::send(IRSender& IR, byte powerModeCmd, byte operatingModeCmd, byte fanSpeedCmd, byte temperatureCmd, byte swingVCmd, byte swingHCmd)
 {
+  (void)swingVCmd;
+  (void)swingHCmd;
+
   // Sensible defaults for the heat pump mode
 
   byte powerMode = SAMSUNG_AIRCON1_MODE_ON;