# https://wokwi.com/projects/new/micropython-pi-pico-w
# https://www.youtube.com/watch?v=THUGLRGuOU8
# https://core-electronics.com.au/guides/getting-started-with-mqtt-on-raspberry-pi-pico-w-connect-to-the-internet-of-things/
# library manager https://wokwi.com/projects/360519097147837441
# https://wokwi.com/projects/322577683855704658  working example of mqtt

#from umqtt.simple import MQTTClient 
#from mqttsimple import MQTTClient 

#from umqtt.simple import MQTTClient
import time 
import rp2
from umqtt import MQTTClient
import machine 
import random 
import network


# Simulated WiFi connection (no actual WiFi)
print(" Connected!")


MQTT_BROKER="broker.emqx.io"
MQTT_TOPIC="MiloTopic"
MQTT_CLIENT_ID="my_pico_mqtt_client"

client = MQTTClient(client_id=MQTT_CLIENT_ID, server=MQTT_BROKER)

#client.disconnect();
try:
  client.connect()
except OSError as error:
  print(f'error is {error}')
#message = "Hello, MQTT!"
message = "add"
# 發布消息
client.publish(MQTT_TOPIC, message) 

# 斷開 MQTT 連接
client.disconnect()

print("MQTT消息已成功發布")

print("Hello, Pi Pico W!")