Publish temperature and humidity to a MQTT topic using a NodeMCU + Micropython and a DHT11

pub_dht11.py

import dht
import machine
import network
import utime
from umqtt.simple import MQTTClient

NODEMCU_PINS = (16, 5, 4, 0, 2, 14, 12, 13, 15, 3, 1, 9, 10)

d = dht.DHT11(machine.Pin(NODEMCU_PINS[4]))
sta_if = network.WLAN(network.STA_IF)

while True:
    if not sta_if.isconnected():
        print('Connecting to WiFi...')
        sta_if.active(True)
        sta_if.connect('essid', 'password')
        while not sta_if.isconnected():
            utime.sleep(1)

    print('Connecting to MQTT server...')
    c = MQTTClient("unique-client-id", "mqtt-server-addr", user="user", password="password")
    c.connect()
    d.measure()
    print('Publishing sensors...')
    c.publish("node/temp", str(d.temperature()), retain=True, qos=1)
    c.publish("node/hum", str(d.humidity()), retain=True, qos=1)
    c.disconnect()

    utime.sleep(5)

    rtc = machine.RTC()
    rtc.irq(trigger=rtc.ALARM0, wake=machine.DEEPSLEEP)
    rtc.alarm(rtc.ALARM0, 60000)
    print('Zzzzz...')
    machine.deepsleep()