bme mqtt

import machine
import time
from machine import Pin
import bme280_float
import network
from umqtt.simple import MQTTClient
WiFi_SSID = "ssidname"
WiFi_PASS = "ssidpass"

SERVER = "mqtt.thingspeak.com"
CHANNEL_ID = "77777"
WRITE_API_KEY = "XXXXXXX"
led = Pin(2, Pin.OUT)

def do_connect():
    wlan = network.WLAN(network.STA_IF)
    wlan.active(True)
    if not wlan.isconnected():
        print('connecting to network... ')
        wlan.connect(WiFi_SSID, WiFi_PASS)
        print
        while not wlan.isconnected():
            pass
    print('network config:', wlan.ifconfig())
    print('SSID: ', WiFi_SSID)

def collectData():
    temp1, pas1, hum1 = bme.values
    #temp1 = result[0]
    #hum1 = result[2]
    hum1 = hum1.replace("%", "")
    temp1 = temp1.replace("C", "")
    led.on()
    return temp1, hum1

do_connect()

i2c = machine.I2C(scl=machine.Pin(5), sda=machine.Pin(4))
#bme= BME280(i2c=i2c, mode=BME280_OSAMPLE_8, address=BME280_I2CADDR)
bme = bme280_float.BME280(i2c=i2c)



client = MQTTClient("umqtt_client", SERVER)
topic = "channels/" + CHANNEL_ID + "/publish/" + WRITE_API_KEY

while True:
    temp1, hum1 = collectData()
    payload = "field1="+str(hum1)+"&field2="+str(temp1)
    print(payload)
    client.connect()
    client.publish(topic, payload)
    client.disconnect()
    led.off()
    time.sleep(180)