import network
import time
import machine          # <--- THIS WAS MISSING!
from machine import Pin
import ubinascii
import random
from umqttsimple import MQTTClient  # <--- Uses your new file

# --- CONFIGURATION ---
MQTT_BROKER = "broker.hivemq.com"
MQTT_TOPIC = "shafwan19/sensor/data"
CLIENT_ID = ubinascii.hexlify(machine.unique_id()) # This line caused your crash!

# 1. Connect to Wokwi Virtual WiFi
print("Connecting to WiFi...", end="")
sta_if = network.WLAN(network.STA_IF)
sta_if.active(True)
sta_if.connect('Wokwi-GUEST', '')
while not sta_if.isconnected():
  print(".", end="")
  time.sleep(0.1)
print(" Connected!")

# 2. Connect to MQTT Broker
print("Connecting to MQTT...", end="")
client = MQTTClient(CLIENT_ID, MQTT_BROKER)
client.connect()
print(" Connected!")

# 3. Send Fake Data Loop
while True:
  # Simulate a sensor reading (Fake Temperature)
  temp = random.uniform(20.0, 70.0)
  
  # Send it to the cloud
  msg = str(temp)
  print(f"Sending: {msg}")
  client.publish(MQTT_TOPIC, msg)
  
  time.sleep(2)