from azure.iot.device import IoTHubDeviceClient, Message
import time
import random


# ENTER CONNECTION STRING FROM AZURE IOT HUB
CONNECTION_STRING = "HostName=ESP32-IoTHub.azure-devices.net;DeviceId=Simulated-ESP32;SharedAccessKey=hGbt7EnzeJDtfCirbRuNVLr/6AMSXyLgVqTo4DNlTuI="
# Creating client to connect Azure IoT Hub using connection string
client = IoTHubDeviceClient.create_from_connection_string(CONNECTION_STRING)


print("Simulated ESP32 is sending data to Azure IOT HUB...")

try:
    while True:
        # Random simulated data 
        temperature = round(random.uniform(20, 30), 2)  # Random temperature (20 to 30 Celcius)
        humidity = round(random.uniform(40, 60), 2)  # Random humidity (40 to 60 %)

        # Create JSON-formatted message to send IoT Hub
        message = Message(f'{{"temperature": {temperature}, "humidity": {humidity}}}')

        # Send message to Azure IoT Hub
        client.send_message(message)
        print(f"Sent: {message}")

        # 5 second delay before sending next message
        time.sleep(5)

except KeyboardInterrupt:
    # If user stops the script (Ctrl+C), print message and clean up
    print("Stopped sending data.")

finally:
    # Shut down IoT Hub client
    client.shutdown()