diff --git a/radio/src/targets/simu/simpgmspace.cpp b/radio/src/targets/simu/simpgmspace.cpp
index 8307499ef..db52fb40d 100644
--- a/radio/src/targets/simu/simpgmspace.cpp
+++ b/radio/src/targets/simu/simpgmspace.cpp
@@ -34,20 +34,15 @@
   #include <SDL.h>
 #endif
 
-uint8_t MCUCSR, MCUSR, MCUCR;
-volatile uint8_t pina=0xff, pinb=0xff, pinc=0xff, pind, pine=0xff, pinf=0xff, ping=0xff, pinh=0xff, pinj=0, pinl=0;
-uint8_t portb, portc, porth=0, dummyport;
-uint16_t dummyport16;
 int g_snapshot_idx = 0;
 
 uint8_t simu_start_mode = 0;
-char * main_thread_error = NULL;
+char * main_thread_error = nullptr;
 
 bool simu_shutdown = false;
 bool simu_running = false;
 
 #if defined(STM32)
-uint32_t Peri1_frequency, Peri2_frequency;
 GPIO_TypeDef gpioa, gpiob, gpioc, gpiod, gpioe, gpiof, gpiog, gpioh, gpioi, gpioj;
 TIM_TypeDef tim1, tim2, tim3, tim4, tim5, tim6, tim7, tim8, tim9, tim10;
 RCC_TypeDef rcc;
@@ -80,14 +75,12 @@ void toplcdOff()
 uint64_t simuTimerMicros(void)
 {
 #if SIMPGMSPC_USE_QT
-
   static QElapsedTimer ticker;
   if (!ticker.isValid())
     ticker.start();
   return ticker.nsecsElapsed() / 1000;
 
 #elif defined(_MSC_VER)
-
   static double freqScale = 0.0;
   static LARGE_INTEGER firstTick;
   LARGE_INTEGER newTick;
@@ -106,12 +99,9 @@ uint64_t simuTimerMicros(void)
   QueryPerformanceCounter(&newTick);
   // compute the elapsed time
   return (newTick.QuadPart - firstTick.QuadPart) * freqScale;
-
 #else  // GNUC
-
   auto now = std::chrono::steady_clock::now();
   return (uint64_t) std::chrono::duration_cast<std::chrono::microseconds>(now.time_since_epoch()).count();
-
 #endif
 }
 
@@ -389,7 +379,6 @@ void StartAudioThread(int volumeGain)
 #ifdef __linux__
   pthread_setname_np(simuAudio.threadPid, "audio");
 #endif
-  return;
 }
 
 void StopAudioThread()