import network
import time
import json
from machine import Pin,ADC
from time import sleep
from umqtt.simple import MQTTClient
#connecting the controller with internet
pot1=Pin(34)
pot=ADC(pot1)
print("connecting to internet")
sta=network.WLAN(network.STA_IF)
sta.active(True)
sta.connect('Wokwi-GUEST','')

while not sta.isconnected():
    print(".",end="")
    time.sleep(0.2)
print("connected")
#declaring constant
mqtt_bro="broker.hivemq.com"
mqtt_port=1883
mqtt_topic="temp"
client_id="suga"
#mqtt instance
mqtt=MQTTClient(client_id,mqtt_bro,port=mqtt_port)
#function for connecting mqtt 
def conn_mqtt():
    try:
        print("connecting MQTT")
        mqtt.connect()
    except Exception as e:
       print("exception due to",str(e))
conn_mqtt()

while True:
    sleep(2)
    val=str(pot,read())
    mqtt.publish(mqtt_topic,val)
    print("published" + val+"topic temp")