diff --git a/src/main.cpp b/src/main.cpp
index 280da7b..458a7d3 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -15,6 +15,7 @@
 #define SERVICE_UUID        "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
 #define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361f26d8"
 #define UUID_CHAR_UUID      "beb5483e-36e1-4688-b7f5-ea07361f26d9"
+#define VERSION_UUID        "beb5483e-36e1-4688-b7f5-ea07361f26db"
 
 #define HMAC_PKT_SIZE 37   // 1 cmd + 4 seq + 32 hmac
 #define HMAC_KEY_LEN  32
@@ -202,6 +203,12 @@ void setup() {
     );
     pUuidChar->setValue(deviceUuid, ESP_UUID_LEN);
 
+    NimBLECharacteristic *pVersionChar = pService->createCharacteristic(
+        VERSION_UUID,
+        NIMBLE_PROPERTY::READ
+    );
+    pVersionChar->setValue(FIRMWARE_VERSION);
+
     NimBLEAdvertising *pAdvertising = NimBLEDevice::getAdvertising();
     pAdvertising->setName("SylDa_Server");
     pAdvertising->addServiceUUID(SERVICE_UUID);