Update send_data_iwatch.py

Fix the hard-coded IP address

mqtt-iwatch-wot/iwatch/send_data_iwatch.py

@@ -2,9 +2,10 @@
 import json
 import iwatch_simulator
 import time
+import os
+import socket
 
 # Replace with your own values
-MQTT_BROKER_ADDRESS = "IP_ADDRESS_MQTT"
 MQTT_BROKER_PORT = 1883
 THING_ID = "org.Iotp2c:iwatch"
 MQTT_TOPIC = f"{THING_ID}/things/twin/commands/modify"
@@ -27,10 +28,13 @@ def send_data_to_ditto(iwatch_data):
     client.on_connect = on_connect
     client.on_disconnect = on_disconnect
     client.on_publish = on_publish
+
+    # Get the IP address of the MQTT broker
+    broker_ip = socket.gethostbyname("mosquitto")
 
     # Connect to the MQTT broker
     client.username_pw_set(username='ditto', password='ditto')
-    client.connect(MQTT_BROKER_ADDRESS, MQTT_BROKER_PORT, 60)
+    client.connect(broker_ip, MQTT_BROKER_PORT, 60)
 
     # Prepare the Ditto command payload
     ditto_data = {