diff --git a/ESP32_Temperture-Node/README.md b/ESP32_Temperture-Node/README.md
index d0f831f99..e3cbf48f9 100644
--- a/ESP32_Temperture-Node/README.md
+++ b/ESP32_Temperture-Node/README.md
@@ -45,4 +45,13 @@ keyfile /mosquitto/config/certs/esp32.key
 allow_anonymous true
 persistence true
 persistence_location /srv/dev-disk-by-label/docker/columes/mosquitto/data/
+```
+
+## ESP32 MQTT Client
+
+<p>The two lines of code shown below are most crucial as they are responsible for connecting ESP32 to the MQTT broker.</p>
+
+```C
+espClientSSL.setCACert(NODE_CERT_CA);
+connection.setServer(mqtt_server, 8883);
 ```
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