diff --git a/fantemp/controller.cpp b/fantemp/controller.cpp
new file mode 100644
index 0000000..40b4f83
--- /dev/null
+++ b/fantemp/controller.cpp
@@ -0,0 +1,36 @@
+#include "controller.hpp"
+
+#define ADC_INT_VECTOR
+#include "adc/adc.hpp"
+
+double Controller::m_adcSample;
+double Controller::m_resistance;
+double Controller::m_temperature;
+uint8_t Controller::m_fanSpeed;
+
+void Controller::init()
+{
+	m_adcPin.init();
+	pwm::init();
+	pwm::setDuty(100);
+}
+
+void Controller::callback()
+{
+	sample();
+	mapTemperature();
+	pwm::setDuty(m_fanSpeed);
+}
+
+void Controller::sample()
+{
+	m_adcSample = m_thermistor.sampleAdc(m_adcPin, 1000);
+	m_resistance = m_thermistor.getResistance(m_adcSample);
+	m_temperature = m_thermistor.getTemperature(m_resistance);
+}
+
+void Controller::mapTemperature()
+{
+	double fanSpeed = (10 * m_temperature - 200) / 3;
+	m_fanSpeed = clamp<uint8_t>(fanSpeed, 0, 100);
+}
diff --git a/fantemp/controller.hpp b/fantemp/controller.hpp
new file mode 100644
index 0000000..74dd7db
--- /dev/null
+++ b/fantemp/controller.hpp
@@ -0,0 +1,39 @@
+#pragma once
+
+#include "adc/adc.hpp"
+#include "io/io.hpp"
+
+#include "pwm.hpp"
+#include "thermistor.hpp"
+
+class Controller {
+  public:
+	static double m_adcSample;
+	static double m_resistance;
+	static double m_temperature;
+	static uint8_t m_fanSpeed;
+
+	static void init();
+
+	static void callback();
+
+  private:
+	using adc_conf = adc::Config<adc::SingleMode>;
+	static adc::Adc<adc_conf, io::P, io::P::C0> m_adcPin;
+
+	static Thermistor m_thermistor;
+
+	static void sample();
+
+	template <typename T>
+	static T clamp(double value, T lower, T upper)
+	{
+		if (value < lower)
+			return lower;
+		if (value > upper)
+			return upper;
+		return static_cast<T>(value);
+	}
+
+	static void mapTemperature();
+};
diff --git a/fantemp/fantemp.cppproj b/fantemp/fantemp.cppproj
index 35bbaeb..ae268db 100644
--- a/fantemp/fantemp.cppproj
+++ b/fantemp/fantemp.cppproj
@@ -203,6 +203,12 @@
     <Compile Include="clock.hpp">
       <SubType>compile</SubType>
     </Compile>
+    <Compile Include="controller.cpp">
+      <SubType>compile</SubType>
+    </Compile>
+    <Compile Include="controller.hpp">
+      <SubType>compile</SubType>
+    </Compile>
     <Compile Include="flash\flash.hpp">
       <SubType>compile</SubType>
     </Compile>
diff --git a/fantemp/main.cpp b/fantemp/main.cpp
index ec0f3f6..d37fafa 100644
--- a/fantemp/main.cpp
+++ b/fantemp/main.cpp
@@ -1,75 +1,26 @@
 #include "clock.hpp"
 
-#include <stdio.h>
-
-#include "flash/flash.hpp"
-#include "io/io.hpp"
 #include "uart/uart.hpp"
 
-#define ADC_INT_VECTOR
-#include "adc/adc.hpp"
-
 #define UART0_INT_VECTORS
 #include "uart/hardware0.hpp"
 
-#include "pwm.hpp"
+#include "controller.hpp"
 #include "terminal.hpp"
-#include "thermistor.hpp"
-
-template <typename T>
-T clamp(double value, T lower, T upper)
-{
-	if (value < lower)
-		return lower;
-	if (value > upper)
-		return upper;
-	return static_cast<T>(value);
-}
-
-uint8_t temperatureCurve(double temperature)
-{
-	double fanSpeed = (10 * temperature - 200) / 3;
-	return clamp<uint8_t>(fanSpeed, 0, 100);
-}
 
 int main()
 {
-	uart::Uart0<uart::Config<115200>> serial;
-	Terminal<decltype(serial)> terminal;
+	using serial = uart::Uart0<uart::Config<115200>>;
+	Terminal<serial> terminal;
 	terminal.init();
 
-	using adc_conf = adc::Config<adc::SingleMode>;
-
-	adc::Adc<adc_conf, io::P, io::P::C0> adcPin;
-	adcPin.init();
-
-	Thermistor temp;
-
-	pwm::init();
-	pwm::setDuty(100);
+	Controller controller;
+	controller.init();
 
 	while (true) {
-		const auto adcSample = temp.sampleAdc(adcPin, 1000);
-		const auto fantempResistance = temp.getResistance(adcSample);
-		const auto temperature = temp.getTemperature(fantempResistance);
-		const auto fanSpeed = temperatureCurve(temperature);
-
-		/*char floatBuffer[16];
-
-		sprintf(floatBuffer, "%.2f", adcSample);
-		serial << F("Read ADC: ") << floatBuffer << F("\r\n");
-		sprintf(floatBuffer, "%.2f", fantempResistance);
-		serial << F("Resistance: ") << floatBuffer << F("\r\n");
-		sprintf(floatBuffer, "%.2f", temperature);
-		serial << F("Temperature: ") << floatBuffer << F(" C \r\n");
-		serial << F("Fan speed: ") << fanSpeed << F("%\r\n");*/
-
-		pwm::setDuty(fanSpeed);
-
+		controller.callback();
 		terminal.callback();
 	}
 
-	serial.flushTx();
-
 	return 0;
 }
diff --git a/fantemp/terminal.hpp b/fantemp/terminal.hpp
index a0fd3a6..33208f1 100644
--- a/fantemp/terminal.hpp
+++ b/fantemp/terminal.hpp
@@ -2,12 +2,17 @@
 
 #include <ctype.h>
 #include <stdint.h>
+#include <stdio.h>
 
 #include <avr/pgmspace.h>
 
 #include "flash/flash.hpp"
 
+#include "controller.hpp"
+
 #define ENDL F("\r\n")
+#define HELP_CMD F("help")
+#define SHOW_CMD F("show")
 
 template <class Uart>
 class Terminal {
@@ -79,15 +84,33 @@ class Terminal {
 
 	static void parseInput()
 	{
-		if (m_inputSize && strncmp_P(m_inputBuffer, reinterpret_cast<const char *>(F("help")), m_inputSize) == 0) {
-			printHelp();
+		if (m_inputSize) {
+			if (strncmp_P(m_inputBuffer, reinterpret_cast<const char *>(HELP_CMD), m_inputSize) == 0) {
+				printHelp();
+			} else if (strncmp_P(m_inputBuffer, reinterpret_cast<const char *>(SHOW_CMD), m_inputSize) == 0) {
+				showState();
+			}
 		}
 	}
 
 	static void printHelp()
 	{
-		m_serial << F("Help: ") << ENDL;
-		m_serial << F("help .: print this help message") << ENDL;
+		m_serial << F("FanTemp command overview: ") << ENDL;
+		m_serial << HELP_CMD << F(" .: print this help message") << ENDL;
+		m_serial << SHOW_CMD << F(" .: shows current temperature and fan speed") << ENDL;
+	}
+
+	static void showState()
+	{
+		char floatBuffer[16];
+
+		sprintf(floatBuffer, "%.2f", Controller::m_adcSample);
+		m_serial << F("Read ADC: ") << floatBuffer << F("\r\n");
+		sprintf(floatBuffer, "%.2f", Controller::m_resistance);
+		m_serial << F("Resistance: ") << floatBuffer << F("\r\n");
+		sprintf(floatBuffer, "%.2f", Controller::m_temperature);
+		m_serial << F("Temperature: ") << floatBuffer << F(" C \r\n");
+		m_serial << F("Fan speed: ") << Controller::m_fanSpeed << F("%\r\n");
 	}
 };
 
@@ -98,3 +121,5 @@ template <class Uart>
 uint16_t Terminal<Uart>::m_inputSize = 0;
 
 #undef ENDL
+#undef HELP_CMD
+#undef SHOW_CMD