Temperature_Sensor.py

import paho.mqtt.client as mqtt
import random
import time
from datetime import date, datetime
import json

# define client
client = mqtt.Client("temperature")

# connect to the broker on an appropriate port
client.connect("broker.hivemq.com", 1883)

# infinite loop to generate data from fake sensor devices
while True:
    # 1 tempurature sensor
    Temperature = random.randint(5, 30) # gives random temperature number
    status = True  # This will tell us if the sensor is On or Off
    day = date.today()  # date function call
    clock = datetime.now()  # time function calls
    time_time = datetime.time(clock) # The exact time stamp

    # store all data into array 'data'
    data = [Temperature, status, str(day), str(time_time)]

    # encode array 'data' into json data format to send it through topic
    data_encoded = json.dumps(data)

    # publish data to topics and print
    client.publish("cartrax/temperature_sensor/data", data_encoded)

    # print message with data, time and date to check if it is published
    print("Just published: id- " + str(Temperature) + "; status- " + str(status) + "; day- " + str(day) + "; time- " + str(time_time) +
          " to topic: 'cartrax/temperature_sensor/data'\n")

    # publish new entry between 3 and 10 seconds
    time.sleep(3)