diff --git a/Software_development/Code.ino b/Software_development/Code.ino
new file mode 100644
index 0000000..9ac7ca8
--- /dev/null
+++ b/Software_development/Code.ino
@@ -0,0 +1,383 @@
+#include <LiquidCrystal.h>
+
+// LCD 
+#define rs 2
+#define en 3
+#define d4 4
+#define d5 5
+#define d6 6
+#define d7 7
+LiquidCrystal lcd(rs, en, d4, d5, d6, d7);
+
+// Encoder inicialization
+#define CLK 10
+#define DT 9
+#define SW 8 
+
+// Borders for buttons
+#define UP_const 100
+#define DOWN_const_high 600
+#define DOWN_const_low 400
+
+// Discharge button
+#define DISCH_PIN 11
+
+
+// Output pin
+#define OUT_PIN_1 12
+#define OUT_PIN_2 21
+#define OUT_PIN_3 20
+
+// Variables
+int counter_case_1 = 0;
+int currentStateCLK;
+int lastStateCLK;
+String currentDir ="";
+unsigned long lastButtonPress = 0;
+unsigned long DICHARGElastButtonPress = 0;
+
+bool button_UP_pressed=false;
+bool button_DOWN_pressed=false;
+bool button_UP_status=false;
+bool button_DOWN_status=false;
+bool Case_0_status=false;
+bool Case_1_status=false;
+bool Case_2_status=false;
+
+int menu_status=0;
+bool menu_status_CHANGE=false;
+
+float voltage_level=0;
+float voltage_step=1;
+
+int x, x_check;
+
+int battery_status=-1, battery_status_update=-1, battery_level=0;
+
+int puls_freq=11; //puls frequency in kHz
+
+void setup() {
+
+// LCD initialization
+lcd.begin(20, 4);
+
+lcd.clear();
+lcd.setCursor(7, 1);
+lcd.print("O-ESD");
+lcd.setCursor(6, 2);
+lcd.print("WELCOME");
+delay(3000);
+lcd.clear();
+lcd.setCursor(1, 0);
+lcd.print("Battery:  ");
+lcd.setCursor(0, 1);
+lcd.print(">Discharge: Contact");
+lcd.setCursor(1, 2);
+lcd.print("Frequency: 11 kHz");
+lcd.setCursor(1, 3);
+lcd.print("Mode:      Single");
+
+
+// Encoder initialization
+pinMode(CLK,INPUT);
+pinMode(DT,INPUT);
+pinMode(SW, INPUT_PULLUP);
+lastStateCLK = digitalRead(CLK);
+
+// Output pin
+digitalWrite(OUT_PIN_1, LOW);
+pinMode(OUT_PIN_1, OUTPUT);
+digitalWrite(OUT_PIN_2, HIGH);
+pinMode(OUT_PIN_2, OUTPUT);
+digitalWrite(OUT_PIN_3, LOW);
+pinMode(OUT_PIN_3, OUTPUT);
+}
+
+void loop() {
+
+  battery_level=analogRead(1);
+  //lcd.setCursor(0, 0);
+  //lcd.print("Battery: ");
+  
+  if (battery_level < 650) {battery_status_update=0;} //under 3.7 V
+  else {if (650 < battery_level && battery_level < 675) battery_status_update=1;
+  else {if (675 < battery_level && battery_level < 700) battery_status_update=2;
+  else {if (700 < battery_level && battery_level < 725) battery_status_update=3;
+  else {if (725 < battery_level && battery_level < 750) battery_status_update=4;
+  else {if (750 < battery_level && battery_level < 775) battery_status_update=5;
+  else {if (775 < battery_level && battery_level < 800) battery_status_update=6;
+  else {if (800 < battery_level && battery_level < 825) battery_status_update=7;
+  else {if (825 < battery_level && battery_level < 850) battery_status_update=8;
+  else {if (850 < battery_level && battery_level < 860) battery_status_update=9;
+  else {battery_status_update=10;}
+  } } } } } } } } }
+
+  if (battery_status!=battery_status_update) {
+    switch (battery_status_update){
+      case 0: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(12, 0);lcd.print("Low"); break; //under 3.7 V
+      case 1: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(19, 0); lcd.print(char(255)); break;
+      case 2: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(18, 0); lcd.print(char(255));lcd.print(char(255)); break;
+      case 3: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(17, 0); lcd.print(char(255));lcd.print(char(255));lcd.print(char(255)); break;
+      case 4: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(16, 0); lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255)); break;
+      case 5: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(15, 0); lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255)); break;
+      case 6: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(14, 0); lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255)); break;
+      case 7: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(13, 0); lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255)); break;
+      case 8: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(12, 0); lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255)); break;
+      case 9: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(11, 0); lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255)); break;
+      case 10: lcd.setCursor(9, 0); lcd.print("           ");  lcd.setCursor(12, 0);lcd.print("Problem"); break;
+  }
+  battery_status=battery_status_update;
+  }
+ 
+
+if (menu_status_CHANGE) {
+   switch (menu_status) {
+    case 0: 
+      lcd.setCursor(0, 2);
+      lcd.print(" ");
+      lcd.setCursor(0, 3);
+      lcd.print(" ");
+      lcd.setCursor(0, 1);
+      lcd.print(">");
+      break;
+    case 1:
+      lcd.setCursor(0, 1);
+      lcd.print(" ");
+      lcd.setCursor(0, 3);
+      lcd.print(" ");
+      lcd.setCursor(0, 2);
+      lcd.print(">");
+      break;
+    case 2:
+      lcd.setCursor(0, 1);
+      lcd.print(" ");
+      lcd.setCursor(0, 2);
+      lcd.print(" ");
+      lcd.setCursor(0, 3);     
+      lcd.print(">");
+      break;
+  }
+  menu_status_CHANGE=false;
+}
+
+
+
+ // Handle buttons 
+  x = analogRead (0);
+  delay(1);
+
+  if (x < UP_const && !button_UP_pressed) {
+      delay(5);
+      x_check=analogRead(0);
+      if(x_check < UP_const) {
+        button_UP_pressed=true;
+        }
+    
+    if(button_UP_pressed){
+       if (menu_status>0){
+         menu_status=menu_status-1;
+         menu_status_CHANGE=true;
+         }
+
+    } 
+
+    
+    while(button_UP_pressed)
+    {
+      delay(10);
+      x_check=analogRead(0);
+      if(x_check<UP_const){
+        button_UP_pressed=true;
+      }
+      else {button_UP_pressed=false;}
+     }
+
+    }
+
+   
+  if (x < DOWN_const_high && x > DOWN_const_low && !button_DOWN_pressed) {
+      delay(5);
+      x_check=analogRead(0);
+      if(x_check< DOWN_const_high && x_check>DOWN_const_low){
+        button_DOWN_pressed=true;
+        }    
+    if(button_DOWN_pressed){
+      if (menu_status<2){
+        menu_status=menu_status+1;
+        menu_status_CHANGE=true;
+
+      }
+
+      while(button_DOWN_pressed)
+      {
+        delay(10);
+        x_check=analogRead(0);
+          if(x_check<DOWN_const_high && x_check>DOWN_const_low){
+            button_DOWN_pressed=true;
+            }
+          else {button_DOWN_pressed=false;}
+      }
+    }
+  }
+  delay(1);
+
+
+
+// Encoder check
+
+if (menu_status==1){
+  currentStateCLK = digitalRead(CLK);
+  if (currentStateCLK != lastStateCLK  && currentStateCLK == 1){
+
+		if (digitalRead(DT) != currentStateCLK) {
+			if (Case_1_status) {
+        puls_freq=puls_freq-1;
+        }
+      else {
+        puls_freq=puls_freq-1;
+      }
+			currentDir ="CCW";
+		} 
+    else {
+			if (Case_1_status) {
+        puls_freq=puls_freq+1;
+        }
+      else {
+        puls_freq=puls_freq+1;
+      }
+			currentDir ="CW";
+		}
+
+    lcd.setCursor(12, 2);
+    lcd.print("        ");
+    lcd.setCursor(12, 2);
+    lcd.print(puls_freq,1);
+    lcd.print(" kHz");
+	}
+
+
+	lastStateCLK = currentStateCLK;
+}
+
+int btnState = digitalRead(SW);
+
+if (btnState == LOW) {
+		if (millis() - lastButtonPress > 50) {
+      switch (menu_status){
+        case 0:
+          if (Case_0_status) {
+            lcd.setCursor(12, 1);
+            lcd.print("        ");
+            lcd.setCursor(12, 1);
+            lcd.print("Contact");
+             Case_0_status=false;
+            }
+          else {
+            lcd.setCursor(12, 1);
+            lcd.print("        ");
+            lcd.setCursor(12, 1);
+            lcd.print("Air");
+            Case_0_status=true;
+            }
+          break;
+        case 1:
+          if (Case_1_status){
+            Case_1_status=false;
+            }
+          else{
+            Case_1_status=true;
+          }
+          break;
+        case 2:
+          if (Case_2_status) {
+           lcd.setCursor(12, 3);
+          lcd.print("        ");
+           lcd.setCursor(12, 3);
+           lcd.print("Single");
+           Case_2_status=false;
+          }
+          else {
+           lcd.setCursor(12, 3);
+           lcd.print("        ");
+           lcd.setCursor(12, 3);
+           lcd.print("Pulse");
+           Case_2_status=true;
+          }
+          break;
+		}
+    }
+    lastButtonPress = millis();
+}
+
+//Button for disharge start
+
+int Mode=5;
+
+if (!Case_0_status && !Case_2_status) Mode=1; // Contact discharge, Single
+if (!Case_0_status && Case_2_status) Mode=2; // Contact discharge, Repetition
+if (Case_0_status && !Case_2_status) Mode=3; // Air discharge, Single
+if (Case_0_status && Case_2_status) Mode=4; // Air discharge, Repetition
+
+int DICHARGEbtnState = digitalRead(DISCH_PIN);
+
+if (DICHARGEbtnState == HIGH) {
+		if (millis() - DICHARGElastButtonPress > 50) {
+
+          lcd.clear();
+          lcd.setCursor(6,1);
+          lcd.print("TESTING");
+          lcd.setCursor(5,2);
+          lcd.print("DISCHARGE");
+          int us_delay=1000/(2*puls_freq);
+
+
+          for (int counter=0; counter<20000; counter++)
+          {
+            digitalWrite(OUT_PIN_1, HIGH);
+            digitalWrite(OUT_PIN_2, LOW);
+            delayMicroseconds(us_delay); 
+            digitalWrite(OUT_PIN_1, LOW);
+            digitalWrite(OUT_PIN_2, HIGH);
+            delayMicroseconds(us_delay);
+          } 
+          
+          digitalWrite(OUT_PIN_3, HIGH);
+          delay(100); 
+          digitalWrite(OUT_PIN_3, LOW);
+
+          lcd.clear();
+          lcd.setCursor(1, 0);
+          lcd.print("Battery:  ");
+          lcd.setCursor(1, 1);
+          lcd.print("Discharge: Contact");
+          lcd.setCursor(0, 2);
+          lcd.print(">Frequency: ");
+          lcd.setCursor(12, 2);
+          lcd.print(puls_freq,1);
+          lcd.print(" kHz");
+          lcd.setCursor(1, 3);
+          lcd.print("Mode:      Single");
+
+
+    }
+    DICHARGElastButtonPress = millis();
+    
+    lcd.setCursor(1, 0);
+    lcd.print("Battery:  ");
+
+    switch (battery_status){
+      case 0: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(12, 0);lcd.print("Low"); break; //under 3.7 V
+      case 1: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(19, 0); lcd.print(char(255)); break;
+      case 2: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(18, 0); lcd.print(char(255));lcd.print(char(255)); break;
+      case 3: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(17, 0); lcd.print(char(255));lcd.print(char(255));lcd.print(char(255)); break;
+      case 4: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(16, 0); lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255)); break;
+      case 5: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(15, 0); lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255)); break;
+      case 6: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(14, 0); lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255)); break;
+      case 7: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(13, 0); lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255)); break;
+      case 8: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(12, 0); lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255)); break;
+      case 9: lcd.setCursor(9, 0); lcd.print("           "); lcd.setCursor(11, 0); lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255));lcd.print(char(255)); break;
+      case 10: lcd.setCursor(9, 0); lcd.print("           ");  lcd.setCursor(12, 0);lcd.print("Problem"); break;
+    }
+}
+
+}
\ No newline at end of file
diff --git a/Software_development/Readme.txt b/Software_development/Readme.txt
new file mode 100644
index 0000000..6f38cca
--- /dev/null
+++ b/Software_development/Readme.txt
@@ -0,0 +1,10 @@
+This folder contains codes for O-ESD microcontroller(s) that orchestrate all functionalities. 
+
+Due to the ESD tests, the Arduino Nano & Arduino Nano Every are selected as microcontrollers. Hence, the code is for Arduino Nano family of microcontrollers. 
+
+The currently used code in O-ESD prototypes can be found in Code.ino. Note that only functionalities used up to this moment are coded, while the place-holders are put for additional functionalities that are planed. This code is under development and will change. 
+
+Additionally, the code for synthesis of pulse trains of precise frequency can be found in Registers.ino. It is primarily used to test prototypes. 
+
+
+
diff --git a/Software_development/Registers.ino b/Software_development/Registers.ino
new file mode 100644
index 0000000..0125964
--- /dev/null
+++ b/Software_development/Registers.ino
@@ -0,0 +1,53 @@
+void setup ()
+{
+   //--- These lines set-up output at pins #9 and #10 for push-pull and are implemented in hardware ---//
+   digitalWrite( 9, HIGH);  // set pin #9 to HIGH
+   pinMode ( 9, OUTPUT);   // pin #9 in output mode
+   digitalWrite(10, LOW );  // set pin #10 to LOW
+   pinMode (10, OUTPUT);   // pin #10 in output mode
+
+   TCCR1A = 0;             // Timer/Counter Control Register 1A set to 0
+   TCCR1B = 0;             // Timer/Counter Control Register 1B set to 0
+   TCNT1  = 0;             // Set counter for timer #1 to 0
+
+   uint16_t freq = 9000;
+   uint16_t tc = 8000000/freq;
+   //    2 -> 4000 kHz
+   //   20 ->  400 kHz
+   //  200 ->   40 kHz
+   //  800 ->   10 kHz
+   // 1600 ->    5 kHz
+   // 2000 ->    4 kHz
+   
+   ICR1 = tc;
+   OCR1A = tc/2;              // number of ticks for counter 1A -  Output Compare Register for A
+   OCR1B = tc/2;              // set number of ticks for counter 1B to the same value as for 1A -  Output Compare Register for B
+
+   TCCR1A |= (0 << COM1A0);   // enable toggling output A - Compare Match Output A Mode bit set to 1/*
+   TCCR1A |= (1 << COM1A1);
+   TCCR1A |= (1 << COM1B0);   // enable toggling output B - Compare Match Output B Mode bit set to 1
+   TCCR1A |= (1 << COM1B1);
+
+   // Phase and Frequency correct PWM with TOP set by ICR1
+   TCCR1B |= (1 << WGM13);       // WGM=8
+   
+   TCCR1B &= ~((1 << CS12) | (1 << CS11) | (1 << CS10)); // Clear the three clock select bits
+   TCCR1B |= (1 << CS10); 
+     
+   // see https://ww1.microchip.com/downloads/aemDocuments/documents/MCU08/ProductDocuments/DataSheets/ATmega48A-PA-88A-PA-168A-PA-328-P-DS-DS40002061B.pdf
+   // sections 16, 17, 18 for details
+
+   // f = fclk/(2*N*(1+OCR1A))
+   // N variable represents the prescale factor (1, 8, 32, 64, 128, 256, or 1024), set CS10/CS11/CS12 appropriately
+
+   // find values of OCR1A for frequencies of interest
+   // consider using timer #2!   
+
+}
+
+void loop() {
+   // put your main code here, to run repeatedly:
+
+}
+
+