diff --git a/ESP32_Temperture-Node/README.md b/ESP32_Temperture-Node/README.md
index 34944ce9b..8af2defb7 100644
--- a/ESP32_Temperture-Node/README.md
+++ b/ESP32_Temperture-Node/README.md
@@ -29,12 +29,13 @@ networks:
 ```
 
 <p><i>mosquitto.conf</i></p>
+> [!NOTE]
+> If you are using IP addresses, then issue certificates and keys to the corresponding IP address of MQTT brocker
 ``` text
 ## List ports listen to
 listener 1883
 listener 8883
 
-## Certificates and keys issued for local domain 192.168.10.16
 cafile /mosquitto/config/certs/esp32_ca.crt
 certfile /mosquitto/config/certs/esp32.crt
 keyfile /mosquitto/config/certs/esp32.key