diff --git a/.github/workflows/platformio-ci.yml b/.github/workflows/platformio-ci.yml
index 82b3c07..3562921 100644
--- a/.github/workflows/platformio-ci.yml
+++ b/.github/workflows/platformio-ci.yml
@@ -23,6 +23,7 @@ jobs:
           - "SerialToSerialBLE"
           # - "SerialToSerialBLE_TransparentUART"
           - "SerialToSerialBLE_TransparentUART-NimBLE"
+          # - "SerialToSerialBLE_Secure"
         boards:
           - [ esp32dev, esp32-s3-devkitc-1, esp32-c3-devkitm-1 ]
         nimble:
@@ -47,6 +48,11 @@ jobs:
             os: ubuntu-latest
             boards: [esp32dev, esp32-s3-devkitc-1, esp32-c3-devkitm-1]
 
+          - example: "SerialToSerialBLE_Secure"
+            nimble: false
+            os: ubuntu-latest
+            boards: [esp32dev, esp32-s3-devkitc-1, esp32-c3-devkitm-1]
+
     steps:
       - uses: actions/checkout@v4
 
diff --git a/examples/SerialToSerialBLE_Secure/SerialToSerialBLE_Secure.ino b/examples/SerialToSerialBLE_Secure/SerialToSerialBLE_Secure.ino
new file mode 100644
index 0000000..b6d30f8
--- /dev/null
+++ b/examples/SerialToSerialBLE_Secure/SerialToSerialBLE_Secure.ino
@@ -0,0 +1,86 @@
+#include <BLESerial.h>
+
+// FOR ETL: Uncomment the following lines
+// #include <Embedded_Template_Library.h>
+// #include <etl/queue.h>
+// #include <etl/circular_buffer.h>
+
+BLESerial SerialBLE;
+// If you are using an older version of Arduino IDE or C++ compiler, you may need to use
+// an empty template argument (<>), as Class Template Argument Deduction (CTAD) is not
+// supported in C++ versions older than C++17. For more details, see:
+// https://www.cppreference.com/w/cpp/language/ctad.html
+//
+// Uncomment the line below if you are using an older version of Arduino IDE/C++ compiler
+// BLESerial<> SerialBLE;
+
+// FOR ETL: Uncomment one of the following lines
+// BLESerial<etl::queue<uint8_t, 255, etl::memory_model::MEMORY_MODEL_SMALL>> SerialBLE;
+// OR
+// BLESerial<etl::circular_buffer<uint8_t, 255>> SerialBLE;
+
+class AppSecurityCallbacks : public BLESecurityCallbacks {
+  public:
+    AppSecurityCallbacks() {
+        this->passKey = random(111111, 999999);
+    }
+
+    uint32_t onPassKeyRequest(){
+        ESP_LOGI(LOG_TAG, "PassKeyRequest");
+
+        // Generate a random passkey
+        this->passKey = random(111111, 999999);
+
+        return this->passKey;
+    }
+
+    void onPassKeyNotify(uint32_t pass_key){
+        ESP_LOGI(LOG_TAG, "The passkey Notify number: %d", pass_key);
+    }
+
+    bool onConfirmPIN(uint32_t pass_key){
+        ESP_LOGI(LOG_TAG, "The passkey YES/NO number: %d", pass_key);
+        vTaskDelay(5000);
+        return true;
+    }
+
+    bool onSecurityRequest(){
+        ESP_LOGI(LOG_TAG, "SecurityRequest");
+        return true;
+    }
+
+    void onAuthenticationComplete(esp_ble_auth_cmpl_t cmpl){
+        ESP_LOGI(LOG_TAG, "Starting BLE work!");
+    }
+
+  private:
+    uint32_t passKey;
+};
+
+void setup() {
+    BLEDevice::init("ESP32-BLE-Slave");
+    BLEDevice::setEncryptionLevel(ESP_BLE_SEC_ENCRYPT);
+    BLEDevice::setSecurityCallbacks(new AppSecurityCallbacks());
+
+    BLEServer* pServer = BLEDevice::createServer();
+
+    BLESecurity *pSecurity = new BLESecurity();
+    pSecurity->setKeySize();
+    pSecurity->setAuthenticationMode(ESP_LE_AUTH_REQ_SC_ONLY);
+    pSecurity->setCapability(ESP_IO_CAP_IO);
+    pSecurity->setInitEncryptionKey(ESP_BLE_ENC_KEY_MASK | ESP_BLE_ID_KEY_MASK);
+
+    Serial.begin(9600);
+    SerialBLE.begin(pServer);
+}
+
+void loop() {
+    if (Serial.available()) {
+        SerialBLE.write(Serial.read());
+        SerialBLE.flush();
+    }
+
+    if (SerialBLE.available()) {
+        Serial.write(SerialBLE.read());
+    }
+}
\ No newline at end of file
diff --git a/library.json b/library.json
index 7d55903..6d3a214 100644
--- a/library.json
+++ b/library.json
@@ -1,7 +1,7 @@
 {
     "$schema": "https://raw.githubusercontent.com/platformio/platformio-core/develop/platformio/assets/schema/library.json",
     "name": "Serial_BLE",
-    "version": "1.2.0",
+    "version": "1.2.1",
     "description": "Customizable Arduino and ESP32 BLE Serial library, compliant with Nordic UART Service and others.",
     "keywords": [
         "serial",
diff --git a/library.properties b/library.properties
index 985b323..abed17c 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=Serial_BLE
-version=1.2.0
+version=1.2.1
 author=Leonid Meleshin <hello@leon0399.ru>
 maintainer=Leonid Meleshin <hello@leon0399.ru>
 sentence=Customizable BLE Serial (UART) library.