diff --git a/app/CMakeLists.txt b/app/CMakeLists.txt
index d49f58e..2f6b678 100644
--- a/app/CMakeLists.txt
+++ b/app/CMakeLists.txt
@@ -9,11 +9,14 @@ find_package(Boost 1.79.0 COMPONENTS json)
 
 add_executable(app
   src/main.cxx
+  src/sensor/SensorsWrapper.cxx
+  src/sensor/Sensor.cxx
   src/sensor/NvidiaSensor.cxx
+  src/sensor/HwmonSensor.cxx
   src/fan/Pwm.cxx
   src/fan/PwmControl.cxx
-  src/SensorsWrapper.cxx
-  src/sensor/HwmonSensor.cxx
+  src/fan/HwmonFan.cxx
+  src/Mapping.cxx
 )
 
 set_property(TARGET app PROPERTY CXX_STANDARD 17)
diff --git a/app/include/Mapping.h b/app/include/Mapping.h
new file mode 100644
index 0000000..49cc848
--- /dev/null
+++ b/app/include/Mapping.h
@@ -0,0 +1,23 @@
+#ifndef MAPPING_H_
+#define MAPPING_H_
+
+#include <memory>
+#include <vector>
+
+#include <fan/Fan.h>
+#include <fan/PwmControl.h>
+#include <sensor/Sensor.h>
+
+class Mapping {
+public:
+  std::vector<std::shared_ptr<Fan>>
+  createMapping(std::vector<std::shared_ptr<Sensor>> rpmSensors,
+                std::vector<std::shared_ptr<PwmControl>> pwmControls);
+
+private:
+  template <class Printable>
+  void print(std::string listLabel,
+             std::vector<std::shared_ptr<Printable>> list);
+};
+
+#endif // MAPPING_H_
diff --git a/app/include/Printable.h b/app/include/Printable.h
new file mode 100644
index 0000000..4607192
--- /dev/null
+++ b/app/include/Printable.h
@@ -0,0 +1,11 @@
+#ifndef PRINTABLE_H_
+#define PRINTABLE_H_
+
+#include <string>
+
+class Printable {
+public:
+  virtual const std::string toString() const = 0;
+};
+
+#endif // PRINTABLE_H_
diff --git a/app/include/SensorsWrapper.h b/app/include/SensorsWrapper.h
deleted file mode 100644
index 7a22ddf..0000000
--- a/app/include/SensorsWrapper.h
+++ /dev/null
@@ -1,29 +0,0 @@
-#ifndef SENSORSWRAPPER_H_
-#define SENSORSWRAPPER_H_
-
-#include <string>
-#include <vector>
-
-#include <sensors/sensors.h>
-
-struct Sensor {
-  sensors_chip_name chipName;
-  sensors_feature feature;
-  sensors_subfeature subFeature;
-};
-
-class SensorsWrapper {
-public:
-  SensorsWrapper();
-  ~SensorsWrapper();
-
-  std::vector<Sensor> getTemperatureSensors();
-  int getValue(Sensor sensor);
-  std::string getLabel(Sensor sensor);
-
-private:
-  std::vector<Sensor> mTemperatureSensors;
-  std::vector<Sensor> mFanSensors;
-};
-
-#endif // SENSORSWRAPPER_H_
diff --git a/app/include/fan/HwmonFan.h b/app/include/fan/HwmonFan.h
index 4be401c..5931916 100644
--- a/app/include/fan/HwmonFan.h
+++ b/app/include/fan/HwmonFan.h
@@ -9,15 +9,15 @@
 
 class HwmonFan : public Fan {
 public:
-  HwmonFan(std::unique_ptr<PwmControl> pwmControl,
-           std::unique_ptr<Sensor> rpmSensor);
+  HwmonFan(std::shared_ptr<PwmControl> pwmControl,
+           std::shared_ptr<Sensor> rpmSensor);
 
   void pwm(int percent) override;
   int rpm() override;
 
 private:
-  std::unique_ptr<PwmControl> mPwmControl;
-  std::unique_ptr<Sensor> mRpmSensor;
+  std::shared_ptr<PwmControl> mPwmControl;
+  std::shared_ptr<Sensor> mRpmSensor;
 };
 
 #endif // HWMONFAN_H_
diff --git a/app/include/fan/PwmControl.h b/app/include/fan/PwmControl.h
index 9faeae5..4a11895 100644
--- a/app/include/fan/PwmControl.h
+++ b/app/include/fan/PwmControl.h
@@ -3,11 +3,13 @@
 
 #include <string>
 
+#include <Printable.h>
+
 enum class PWM_CONTROL_PROPERTY { CONTROL, ENABLE, MODE };
 enum class PWM_ENABLE { FULL_SPEED = 0, MANUAL_CONTROL };
 enum class PWM_MODE { DC = 0, PWM };
 
-class PwmControl {
+class PwmControl : public Printable {
 public:
   PwmControl(std::string controlPath);
 
@@ -17,6 +19,8 @@ public:
   void enableManualControl();
   void reset();
 
+  const std::string toString() const override;
+
 private:
   int readValue(std::string path);
 
diff --git a/app/include/sensor/HwmonSensor.h b/app/include/sensor/HwmonSensor.h
index 94af1f6..94b5e48 100644
--- a/app/include/sensor/HwmonSensor.h
+++ b/app/include/sensor/HwmonSensor.h
@@ -11,7 +11,7 @@ public:
               const sensors_subfeature *subfeature);
 
   int value() override;
-  std::string name() override;
+  const std::string toString() const override;
 
 private:
   const sensors_chip_name *mChipName;
diff --git a/app/include/sensor/NvidiaSensor.h b/app/include/sensor/NvidiaSensor.h
index 2c5836b..a6dca0f 100644
--- a/app/include/sensor/NvidiaSensor.h
+++ b/app/include/sensor/NvidiaSensor.h
@@ -9,7 +9,8 @@ public:
   ~NvidiaSensor();
 
   int value() override;
-  std::string name() override;
+
+  const std::string toString() const override;
 };
 
 #endif // NVIDIASENSOR_H_
diff --git a/app/include/sensor/Sensor.h b/app/include/sensor/Sensor.h
index f4e969f..4f3c3ca 100644
--- a/app/include/sensor/Sensor.h
+++ b/app/include/sensor/Sensor.h
@@ -1,15 +1,18 @@
 #ifndef SENSOR_H_
 #define SENSOR_H_
 
-#include <iostream>
+#include <Printable.h>
 
-class Sensor {
+class Sensor : public Printable {
 public:
   // Read the current value
   virtual int value() = 0;
-  // Name for displaying. Should be descriptive, e.g. "GPU" or the label from
-  // libsensors.
-  virtual std::string name() = 0;
+
+  virtual int max() const;
+  virtual void max(int value);
+
+protected:
+  int mMax = 0;
 };
 
 #endif // SENSOR_H_
diff --git a/app/include/sensor/SensorsWrapper.h b/app/include/sensor/SensorsWrapper.h
new file mode 100644
index 0000000..7cfef9a
--- /dev/null
+++ b/app/include/sensor/SensorsWrapper.h
@@ -0,0 +1,26 @@
+#ifndef SENSORSWRAPPER_H_
+#define SENSORSWRAPPER_H_
+
+#include <memory>
+#include <vector>
+
+#include <sensors/sensors.h>
+
+#include <fan/PwmControl.h>
+#include <sensor/Sensor.h>
+
+class SensorsWrapper {
+public:
+  SensorsWrapper();
+  ~SensorsWrapper();
+
+  std::vector<std::shared_ptr<Sensor>>
+  Sensors(sensors_subfeature_type sensorType);
+
+  std::vector<std::shared_ptr<PwmControl>> PwmControls();
+
+private:
+  FILE *mConfigFile;
+};
+
+#endif // SENSORSWRAPPER_H_
diff --git a/app/src/Mapping.cxx b/app/src/Mapping.cxx
new file mode 100644
index 0000000..002efea
--- /dev/null
+++ b/app/src/Mapping.cxx
@@ -0,0 +1,76 @@
+#include <chrono>
+#include <iostream>
+#include <map>
+#include <memory>
+#include <thread>
+
+#include <Mapping.h>
+#include <fan/HwmonFan.h>
+#include <fan/PwmControl.h>
+
+#define SETTLE_TIMEOUT 5
+
+using namespace std;
+
+vector<shared_ptr<Fan>>
+Mapping::createMapping(vector<shared_ptr<Sensor>> rpmSensors,
+                       vector<shared_ptr<PwmControl>> pwmControls) {
+  print("RPM Sensors", rpmSensors);
+  print("PWM controllers", pwmControls);
+  vector<shared_ptr<Fan>> mapping;
+
+  cout << "Settings all fans to maximum speed" << endl;
+  for (auto c : pwmControls) {
+    c->enableManualControl();
+    c->pwm(100);
+  }
+
+  // Wait for fans to settle
+  cout << "Waiting for fans to settle" << endl;
+  this_thread::sleep_for(chrono::seconds(SETTLE_TIMEOUT));
+
+  // Record values of all RPM sensors
+  for (auto s : rpmSensors) {
+    int value = s->value();
+    s->max(value);
+
+    cout << s->toString() << " max value: " << s->max() << endl;
+  }
+
+  // Set each fan to 50% and check if a sensor matches
+  for (auto c : pwmControls) {
+    cout << "Setting " << c->toString()
+         << " to 50% and wait for it to settle..." << endl;
+    c->pwm(50);
+
+    this_thread::sleep_for(chrono::seconds(SETTLE_TIMEOUT));
+
+    for (auto s : rpmSensors) {
+      if (s->value() < s->max() * 0.7) {
+        cout << "Found matching sensor " << s->toString() << endl;
+        mapping.push_back(make_shared<HwmonFan>(c, s));
+      }
+    }
+
+    cout << "Setting fan back to 100% and wait for settling" << endl;
+    c->pwm(100);
+    this_thread::sleep_for(chrono::seconds(SETTLE_TIMEOUT));
+  }
+
+  cout << "Resetting all fans" << endl;
+  for (auto c : pwmControls) {
+    c->reset();
+  }
+
+  return mapping;
+}
+
+template <class Printable>
+void Mapping::print(string listLabel, vector<shared_ptr<Printable>> list) {
+  cout << listLabel << ": " << endl;
+
+  for (auto i : list) {
+    cout << i->toString() << endl;
+  }
+  cout << "\n";
+}
diff --git a/app/src/SensorsWrapper.cxx b/app/src/SensorsWrapper.cxx
deleted file mode 100644
index 4cc409a..0000000
--- a/app/src/SensorsWrapper.cxx
+++ /dev/null
@@ -1,58 +0,0 @@
-#include <exception>
-#include <iostream>
-#include <sensors/sensors.h>
-#include <stdexcept>
-
-#include <SensorsWrapper.h>
-
-using namespace std;
-
-#define CONFIG_FILE "/etc/conf.d/sensors"
-
-SensorsWrapper::SensorsWrapper() {
-  auto config = fopen(CONFIG_FILE, "r");
-  if (sensors_init(config) != 0) {
-    throw runtime_error("Config file doesn't exist");
-  }
-
-  int c = 0;
-  for (const sensors_chip_name *chipName;
-       (chipName = sensors_get_detected_chips(0, &c)) != NULL;) {
-
-    int d = 0;
-    for (const sensors_feature *feature;
-         (feature = sensors_get_features(chipName, &d)) != NULL;) {
-      auto tempFeature = sensors_get_subfeature(chipName, feature,
-                                                SENSORS_SUBFEATURE_TEMP_INPUT);
-      if (tempFeature)
-        mTemperatureSensors.push_back(
-            Sensor{*chipName, *feature, *tempFeature});
-
-      auto fanFeature = sensors_get_subfeature(chipName, feature,
-                                               SENSORS_SUBFEATURE_FAN_INPUT);
-      if (fanFeature)
-        mFanSensors.push_back(Sensor{*chipName, *feature, *fanFeature});
-    }
-  }
-}
-
-SensorsWrapper::~SensorsWrapper() { sensors_cleanup(); }
-
-std::vector<Sensor> SensorsWrapper::getTemperatureSensors() {
-  return mTemperatureSensors;
-}
-
-int SensorsWrapper::getValue(Sensor sensor) {
-  double value;
-  const sensors_chip_name *chipName = &sensor.chipName;
-
-  sensors_get_value(chipName, sensor.subFeature.number, &value);
-
-  return (int)value;
-}
-
-string SensorsWrapper::getLabel(Sensor sensor) {
-  const sensors_chip_name *chipName = &sensor.chipName;
-  const sensors_feature *feature = &sensor.feature;
-  return string(sensors_get_label(chipName, feature));
-}
diff --git a/app/src/fan/HwmonFan.cxx b/app/src/fan/HwmonFan.cxx
new file mode 100644
index 0000000..dd3c792
--- /dev/null
+++ b/app/src/fan/HwmonFan.cxx
@@ -0,0 +1,11 @@
+#include <fan/HwmonFan.h>
+
+using namespace std;
+
+HwmonFan::HwmonFan(shared_ptr<PwmControl> pwmControl,
+                   shared_ptr<Sensor> rpmSensor)
+    : mPwmControl(pwmControl), mRpmSensor(rpmSensor) {}
+
+void HwmonFan::pwm(int percent) { mPwmControl->pwm(percent); }
+
+int HwmonFan::rpm() { return mRpmSensor->value(); }
diff --git a/app/src/fan/PwmControl.cxx b/app/src/fan/PwmControl.cxx
index 814bf2f..296335d 100644
--- a/app/src/fan/PwmControl.cxx
+++ b/app/src/fan/PwmControl.cxx
@@ -64,3 +64,7 @@ void PwmControl::reset() {
 
   ostrm.close();
 }
+
+const string PwmControl::toString() const {
+  return fs::path(mControlPath).filename();
+}
diff --git a/app/src/main.cxx b/app/src/main.cxx
index 63538ea..5daa629 100644
--- a/app/src/main.cxx
+++ b/app/src/main.cxx
@@ -1,91 +1,20 @@
-#include <exception>
-#include <filesystem>
-#include <iostream>
-#include <memory>
-#include <regex>
-#include <vector>
 
-#include <sensors/sensors.h>
-
-#include <fan/PwmControl.h>
-#include <sensor/HwmonSensor.h>
+#include <Mapping.h>
 #include <sensor/NvidiaSensor.h>
-
-#define CONFIG_FILE "/etc/conf.d/sensors"
-#define HWMON_BASE_PATH "/sys/class/hwmon"
-
-namespace fs = std::filesystem;
-
-template <sensors_subfeature_type T>
-std::vector<std::shared_ptr<Sensor>> sensors() {
-  std::vector<std::shared_ptr<Sensor>> sensors;
-
-  int c = 0;
-  for (const sensors_chip_name *chipName;
-       (chipName = sensors_get_detected_chips(0, &c)) != NULL;) {
-
-    int d = 0;
-    for (const sensors_feature *feature;
-         (feature = sensors_get_features(chipName, &d)) != NULL;) {
-      auto subFeature = sensors_get_subfeature(chipName, feature, T);
-      if (subFeature) {
-        sensors.push_back(
-            std::make_shared<HwmonSensor>(chipName, feature, subFeature));
-      }
-    }
-  }
-
-  return sensors;
-}
-
-std::vector<std::shared_ptr<PwmControl>> pwmControls() {
-  std::vector<std::shared_ptr<PwmControl>> controls;
-
-  const std::regex re_ctrl_enable("pwm[0-9]_enable");
-  const std::regex re_ctrl_mode("pwm[0-9]_mode");
-  const std::regex re_ctrl("pwm[0-9]");
-
-  if (!fs::exists(HWMON_BASE_PATH)) {
-    std::cout << HWMON_BASE_PATH << " doesn't exist" << std::endl;
-  } else {
-    for (const fs::directory_entry &hwmon_device :
-         fs::directory_iterator{HWMON_BASE_PATH}) {
-
-      for (const fs::directory_entry &control :
-           fs::directory_iterator{hwmon_device}) {
-        auto filename = control.path().filename().string();
-
-        if (regex_match(filename, re_ctrl)) {
-          auto controlPath = control.path().string();
-
-          controls.push_back(std::make_shared<PwmControl>(controlPath));
-        }
-      }
-    }
-  }
-
-  return controls;
-}
+#include <sensor/SensorsWrapper.h>
 
 int main() {
-  auto config = fopen(CONFIG_FILE, "r");
-  if (sensors_init(config) != 0) {
-    throw std::runtime_error("Config file doesn't exist");
-  }
+  SensorsWrapper sensorsWrapper;
 
-  auto tempSensors = sensors<SENSORS_SUBFEATURE_TEMP_INPUT>();
+  auto tempSensors = sensorsWrapper.Sensors(SENSORS_SUBFEATURE_TEMP_INPUT);
   tempSensors.push_back(std::make_shared<NvidiaSensor>());
 
-  for (auto s : tempSensors) {
-    std::cout << s->name() << ": " << s->value() << std::endl;
-  }
+  auto pwmSensors = sensorsWrapper.Sensors(SENSORS_SUBFEATURE_FAN_INPUT);
 
-  std::cout << "pwm" << std::endl;
+  auto controls = sensorsWrapper.PwmControls();
 
-  auto pwmSensors = sensors<SENSORS_SUBFEATURE_FAN_INPUT>();
-  for (auto s : pwmSensors) {
-    std::cout << s->name() << ": " << s->value() << std::endl;
-  }
+  Mapping m;
+  m.createMapping(pwmSensors, controls);
 
   return 0;
 }
diff --git a/app/src/sensor/HwmonSensor.cxx b/app/src/sensor/HwmonSensor.cxx
index 87796d1..0485881 100644
--- a/app/src/sensor/HwmonSensor.cxx
+++ b/app/src/sensor/HwmonSensor.cxx
@@ -1,6 +1,5 @@
-#include <sensors/sensors.h>
-
 #include <sensor/HwmonSensor.h>
+#include <sensors/sensors.h>
 
 using namespace std;
 
@@ -10,10 +9,12 @@ HwmonSensor::HwmonSensor(const sensors_chip_name *chipName,
     : mChipName(chipName), mFeature(feature), mSubFeature(subfeature) {}
 
 int HwmonSensor::value() {
-  double *value;
-  sensors_get_value(mChipName, mSubFeature->number, value);
+  double value;
+  sensors_get_value(mChipName, mSubFeature->number, &value);
 
-  return static_cast<int>(*value);
+  return static_cast<int>(value);
 }
 
-string HwmonSensor::name() { return sensors_get_label(mChipName, mFeature); }
+const string HwmonSensor::toString() const {
+  return sensors_get_label(mChipName, mFeature);
+}
diff --git a/app/src/sensor/NvidiaSensor.cxx b/app/src/sensor/NvidiaSensor.cxx
index 99c913e..d306156 100644
--- a/app/src/sensor/NvidiaSensor.cxx
+++ b/app/src/sensor/NvidiaSensor.cxx
@@ -18,4 +18,4 @@ int NvidiaSensor::value() {
   return static_cast<int>(temp);
 }
 
-string NvidiaSensor::name() { return "GPU"; }
+const std::string NvidiaSensor::toString() const { return "Nvidia GPU"; }
diff --git a/app/src/sensor/Sensor.cxx b/app/src/sensor/Sensor.cxx
new file mode 100644
index 0000000..bc1b582
--- /dev/null
+++ b/app/src/sensor/Sensor.cxx
@@ -0,0 +1,5 @@
+#include <sensor/Sensor.h>
+
+int Sensor::max() const { return mMax; }
+
+void Sensor::max(int value) { mMax = value; }
diff --git a/app/src/sensor/SensorsWrapper.cxx b/app/src/sensor/SensorsWrapper.cxx
new file mode 100644
index 0000000..b3f52fe
--- /dev/null
+++ b/app/src/sensor/SensorsWrapper.cxx
@@ -0,0 +1,78 @@
+#include <cstdio>
+#include <filesystem>
+#include <iostream>
+#include <regex>
+#include <stdexcept>
+#include <type_traits>
+
+#include <sensors/sensors.h>
+
+#include <sensor/SensorsWrapper.h>
+
+#include <sensor/HwmonSensor.h>
+#include <sensor/NvidiaSensor.h>
+
+using namespace std;
+namespace fs = std::filesystem;
+
+#define CONFIG_FILE "/etc/conf.d/sensors"
+#define HWMON_BASE_PATH "/sys/class/hwmon"
+
+SensorsWrapper::SensorsWrapper() : mConfigFile(fopen(CONFIG_FILE, "r")) {
+  if (sensors_init(mConfigFile) != 0) {
+    throw runtime_error("Config file doesn't exist");
+  }
+}
+
+SensorsWrapper::~SensorsWrapper() { sensors_cleanup(); }
+
+std::vector<std::shared_ptr<Sensor>>
+SensorsWrapper::Sensors(sensors_subfeature_type sensorType) {
+  std::vector<std::shared_ptr<Sensor>> sensors;
+
+  int c = 0;
+  for (const sensors_chip_name *chipName;
+       (chipName = sensors_get_detected_chips(0, &c)) != NULL;) {
+
+    int d = 0;
+    for (const sensors_feature *feature;
+         (feature = sensors_get_features(chipName, &d)) != NULL;) {
+      auto subFeature = sensors_get_subfeature(chipName, feature, sensorType);
+      if (subFeature) {
+        sensors.push_back(
+            std::make_shared<HwmonSensor>(chipName, feature, subFeature));
+      }
+    }
+  }
+
+  return sensors;
+}
+
+std::vector<std::shared_ptr<PwmControl>> SensorsWrapper::PwmControls() {
+  std::vector<std::shared_ptr<PwmControl>> controls;
+
+  const std::regex re_ctrl_enable("pwm[0-9]_enable");
+  const std::regex re_ctrl_mode("pwm[0-9]_mode");
+  const std::regex re_ctrl("pwm[0-9]");
+
+  if (!fs::exists(HWMON_BASE_PATH)) {
+    std::cout << HWMON_BASE_PATH << " doesn't exist" << std::endl;
+  } else {
+    for (const fs::directory_entry &hwmon_device :
+         fs::directory_iterator{HWMON_BASE_PATH}) {
+
+      for (const fs::directory_entry &control :
+           fs::directory_iterator{hwmon_device}) {
+        auto filename = control.path().filename().string();
+
+        if (regex_match(filename, re_ctrl)) {
+          auto controlPath = control.path().string();
+
+          controls.push_back(std::make_shared<PwmControl>(controlPath));
+        }
+      }
+    }
+  }
+
+  return controls;
+}