diff --git a/03_SerialBT_2LED/03_SerialBT_2LED.ino b/03_SerialBT_2LED/03_SerialBT_2LED.ino
new file mode 100644
index 0000000..8c89e02
--- /dev/null
+++ b/03_SerialBT_2LED/03_SerialBT_2LED.ino
@@ -0,0 +1,59 @@
+#include "BluetoothSerial.h"
+
+#define LED1_PIN 26
+#define LED2_PIN 27
+
+String device_name = "ESP-LED-VasePrijmeni";
+BluetoothSerial SerialBT;
+
+void setup() {
+  Serial.begin(115200);
+  SerialBT.begin(device_name);
+  Serial.printf("Zarizeni \"%s\" spuštěno. \n",device_name.c_str());
+  pinMode(LED1_PIN, OUTPUT);
+  pinMode(LED2_PIN, OUTPUT);
+  // zajištění vypnutí LED při zapnutí (restartu)
+  digitalWrite(LED1_PIN, LOW);
+  digitalWrite(LED2_PIN, LOW);
+}
+
+void loop() {
+  if (SerialBT.available()) {
+    String command = SerialBT.readStringUntil('\n');
+    command.trim();
+
+    if(command.equalsIgnoreCase("1on")) {
+      digitalWrite(LED1_PIN, HIGH);
+      SerialBT.println("LED 1 zapnuta");
+    } else if (command.equalsIgnoreCase("1off")) {
+      digitalWrite(LED1_PIN, LOW);
+      SerialBT.println("LED 1 vypnuta");
+    } else if (command.equalsIgnoreCase("2on")) {
+      digitalWrite(LED2_PIN, HIGH);
+      SerialBT.println("LED 2 zapnuta");
+    } else if (command.equalsIgnoreCase("2off")) {
+      digitalWrite(LED2_PIN, LOW);
+      SerialBT.println("LED 2 vypnuta");
+    } else if (command.equalsIgnoreCase("on")) {
+      digitalWrite(LED1_PIN, HIGH);
+      digitalWrite(LED2_PIN, HIGH);
+      SerialBT.println("obe LED zapnuty");
+    } else if (command.equalsIgnoreCase("off")) {
+      digitalWrite(LED1_PIN, LOW);
+      digitalWrite(LED2_PIN, LOW);
+      SerialBT.println("obe LED vypnuty");
+    } else {
+      SerialBT.println("neznamy prikaz. Pouzij: 1on, 1off, 2on, 2off, on, off");
+    }
+  }
+  delay(20);
+}
+
+
+
+
+
+
+
+
+
diff --git a/04_WiFi_connect/04_WiFi_connect.ino b/04_WiFi_connect/04_WiFi_connect.ino
new file mode 100644
index 0000000..3ce69bd
--- /dev/null
+++ b/04_WiFi_connect/04_WiFi_connect.ino
@@ -0,0 +1,28 @@
+#include <WiFi.h>
+
+const char* ssid = "VASE_WiFi";
+const char* password = "HESLO_OD_WiFi";
+
+void setup() {
+  Serial.begin(115200);
+  delay(10);
+
+  Serial.println();
+  Serial.print("Pripojuji se k WiFi: ");
+  Serial.println();
+  WiFi.begin(ssid,password);
+
+  while(WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+
+  Serial.println();
+  Serial.println("WiFi připojeno");
+  Serial.print("IP adresa: ");
+  Serial.println(WiFi.localIP());
+  
+}
+void loop(){
+  
+}
\ No newline at end of file
diff --git a/README.md b/README.md
index 9471dda..e76fd3b 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,8 @@ Malý repozitář pro ukládáni programu pro práci s ESP32
 ## Používaný software
 
 - [Arduino IDE](https://www.arduino.cc/en/software)
-
+- [Wokwi online simulator](https://wokwi.com/esp32)
+- [Bluetooth Serial Android](https://play.google.com/store/apps/details?id=de.kai_morich.serial_bluetooth_terminal&hl=cs)
 
 ### Arduino IDE