* * * * * /home/pi/mqtt-dht11s.py

#!/usr/bin/python3
# Program to read current temperature and humidity and post single message to MQTT BROKER
# 2019-01-20

import Adafruit_DHT as dht
import paho.mqtt.publish as publish
import json
import datetime
#
# Sensor should be set to Adafruit_DHT.DHT11, Adafruit_DHT.DHT22, or Adafruit_DHT.AM2302.
sensor = dht.DHT11
pin = 4

BROKER = 'localhost'

sensor_data = {'date': 0, 'temperature': 0, 'humidity': 0}
topicPrefix = "weather"

try:
    humidity,temperature = dht.read_retry(sensor, pin)
    humidity = round(humidity, 2)
    temperature = round(temperature, 2)
    date = datetime.datetime.now().replace(microsecond=0).isoformat()
#     print(u"Date: {:s}, Temperature: {:g}u00b0C, Humidity: {:g}%".format(date, temperature, humidity))
    sensor_data['temperature'] = temperature
    sensor_data['humidity'] = humidity
    sensor_data['date'] = date
    publish.single(topicPrefix, payload=json.dumps(sensor_data), qos=1, retain=True, hostname=BROKER,
        port=1883, client_id="RaspberryPi", keepalive=60)
except KeyboardInterrupt:
    pass

#
# Config file for sSMTP sendmail
#
# The person who gets all mail for userids < 1000
# Make this empty to disable rewriting.
root=USER.raspberry.pi@gmail.com

# The place where the mail goes. The actual machine name is required no
# MX records are consulted. Commonly mailhosts are named mail.domain.com
mailhub=smtp.gmail.com:587

AuthUser=USER.raspberry.pi@gmail.com
AuthPass=…
AuthMethod=LOGIN
UseTLS=YES
UseSTARTTLS=YES

# Where will the mail seem to come from?
rewriteDomain=gmail.com

# The full hostname
hostname=RaspberryPi.USER_HOST

# Are users allowed to set their own From: address?
# YES - Allow the user to specify their own From: address
# NO - Use the system generated From: address
FromLineOverride=YES