diff --git a/README.md b/README.md
new file mode 100644
index 0000000..06a908d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,7 @@
+
+## TODO
+
+* check the ai suggestion
+* time after completion is not displayed
+* eeprom saving every 5 minutes and resuming
+* profile selection
diff --git a/hot_fermentation.ino b/hot_fermentation.ino
index cb16c7a..5ff607e 100644
--- a/hot_fermentation.ino
+++ b/hot_fermentation.ino
@@ -1,7 +1,8 @@
 #include <max6675.h>
 #include <Wire.h>
 #include <PID_v1.h>
-#include <GyverOLED.h>  // Include the GyverOLED library
+#include <GyverOLED.h>
+#include "GyverEncoder.h"  // Include the GyverEncoder library
 
 // MAX6675 configuration
 int max_SO = 12;
@@ -12,6 +13,12 @@ MAX6675 thermocouple(max_SCK, max_CS, max_SO);
 // OLED configuration
 GyverOLED<SSD1306_128x64> oled;
 
+// Encoder configuration
+#define CLK 5
+#define DT 6
+#define SW 7
+Encoder enc1(CLK, DT, SW, TYPE2);
+
 // SSR pin configuration
 const int ssrPin = 7;
 
@@ -36,13 +43,15 @@ Profile profiles[] = {
   {"Фитаза/Протеаза", 2, {{47, 120}, {53, 120}, {65, 150}, {72, 60}, {90, 105}, {50, 60}}, 6},
 };
 
-// Select active profile (constant at this point)
-const int activeProfileIndex = 0;  // Index of the active profile, starting from 0
-Profile activeProfile = profiles[activeProfileIndex];
+// Global variables for profile selection and execution
+int activeProfileIndex = 100;  // 100 indicates no profile selected yet
+int selectedProfileIndex = 0;  // Index of the currently selected profile in the selection mode
+Profile activeProfile;         // The active profile once selected
 
 // Global variables for current phase, setpoint, and transition state
 int currentPhase;
 bool isInTransition = false;
+bool inSelectionMode = true;
 
 // PID Control variables
 double Setpoint, Input, Output;
@@ -67,46 +76,87 @@ void setup() {
   Serial.begin(9600);
   oled.init();          // Initialize the OLED
   oled.clear();         // Clear the display
-  oled.setScale(2);     // Set text scale to 2 for better visibility
-  oled.print("Starting...");
-  oled.update();
-  oled.setScale(1);     // Set text scale back to 1 for more detailed information
-
-  calculateTotalTime();
-
-  // Begin the first phase
-  phaseStartTime = totalStartTime = millis();
-  myPID.SetMode(AUTOMATIC);
-  myPID.SetOutputLimits(0, 1);  // SSR is either ON or OFF
-  digitalWrite(ssrPin, HIGH); // Start with heater on
-  ssrLastSwitchTime = millis();
+  displaySelection();
 }
 
 void loop() {
-  unsigned long currentTime = millis();
-  totalElapsedTime = (currentTime - totalStartTime) / 1000; // Total elapsed time in seconds
+  enc1.tick();  // Mandatory encoder update function
 
-  getPhaseAndTemperature(totalElapsedTime);
+  if (inSelectionMode) {
+    handleProfileSelection();  // Handle profile selection mode
+  } else {
+    unsigned long currentTime = millis();
+    totalElapsedTime = (currentTime - totalStartTime) / 1000; // Total elapsed time in seconds
 
-  Input = (int) thermocouple.readCelsius(); // Cast to integer for display and control
-  myPID.Compute();
+    getPhaseAndTemperature(totalElapsedTime);
 
-  // Switch SSR based on PID output and interval control
-  if (currentTime - ssrLastSwitchTime > ssrSwitchInterval) {
-    digitalWrite(ssrPin, Output > 0.5 ? HIGH : LOW);
-    ssrLastSwitchTime = currentTime;
+    Input = (int) thermocouple.readCelsius(); // Cast to integer for display and control
+    myPID.Compute();
+
+    // Switch SSR based on PID output and interval control
+    if (currentTime - ssrLastSwitchTime > ssrSwitchInterval) {
+      digitalWrite(ssrPin, Output > 0.5 ? HIGH : LOW);
+      ssrLastSwitchTime = currentTime;
+    }
+
+    if (isComplete && currentPhase >= activeProfile.numPhases) {
+      finishTime = currentTime;
+    }
+
+    // Display all phases and highlight the current one
+    printPhases(currentPhase, currentTime - phaseStartTime, currentTime);
+
+    oled.update();
+
+    delay(1000); // Update every second
+  }
+}
+
+void handleProfileSelection() {
+
+  bool click = enc1.isClick();
+  bool turn = enc1.isTurn();
+  if (!click && !turn) {
+    return;
   }
 
-  if (isComplete && currentPhase >= activeProfile.numPhases) {
-    finishTime = currentTime;
+  // Handle encoder input for selecting the profile
+  if (enc1.isRight()) {
+    selectedProfileIndex = (selectedProfileIndex + 1) % (sizeof(profiles) / sizeof(profiles[0]));
+  } else if (enc1.isLeft()) {
+    selectedProfileIndex = (selectedProfileIndex - 1 + (sizeof(profiles) / sizeof(profiles[0]))) % (sizeof(profiles) / sizeof(profiles[0]));
   }
 
-  // Display all phases and highlight the current one
-  printPhases(currentPhase, currentTime - phaseStartTime, currentTime);
+  displaySelection();
 
+  // Start the selected profile on button press
+  if (click) {
+    activeProfileIndex = selectedProfileIndex;
+    activeProfile = profiles[activeProfileIndex];
+    calculateTotalTime();
+    inSelectionMode = false;  // Switch to execution mode
+    phaseStartTime = totalStartTime = millis();  // Start the timer
+    myPID.SetMode(AUTOMATIC);
+    myPID.SetOutputLimits(0, 1);  // SSR is either ON or OFF
+    digitalWrite(ssrPin, HIGH);   // Start with heater on
+    ssrLastSwitchTime = millis();
+  }
+}
+
+void displaySelection() {
+  oled.clear();
+  // Display all profiles with the selected one highlighted
+  for (int i = 0; i < (int) (sizeof(profiles) / sizeof(profiles[0])); i++) {
+    if (i == selectedProfileIndex) {
+      oled.invertText(true);  // Highlight the selected profile
+    }
+
+    oled.setCursor(0, i);  // Set cursor to the correct row
+    oled.print(profiles[i].name);
+
+    oled.invertText(false);  // Reset text inversion for other profiles
+  }
   oled.update();
-
-  delay(1000); // Update every second
 }
 
 void calculateTotalTime() {
@@ -136,9 +186,9 @@ void getPhaseAndTemperature(unsigned long elapsedSeconds) {
 
       if (elapsedSeconds < accumulatedTime + transitionDuration) {
         isInTransition = true;
-        currentPhase = i;
+        currentPhase = i - 1;  // Keep currentPhase as the previous phase
         int timeInTransition = elapsedSeconds - accumulatedTime;
-        Setpoint = previousTemp + ((targetTemp > previousTemp ? (double)timeInTransition / 60 : -(double)timeInTransition / 60) / (double)activeProfile.transitionMinutesPerDegree);
+        Setpoint = previousTemp + (double)timeInTransition / (60 * activeProfile.transitionMinutesPerDegree) * (targetTemp > previousTemp ? 1 : -1);
         return;
       }