Smart Farm project

Program descriptions

RESTcatalog.py

• Home server, uses GET, PUT,POST to send and process data
• Deploys freeboard
• Publishes ip using mqtt
• Stores data in data.json,devices.json,users.json.

device_connector.py

• Must be run on raspberry pi
• Uses Adafruit_DHT, RPi.GPIO libraries
• Reads sensor data, publishes to respective mqtt topics.

emulatedsoilpub.py

• Mqtt publisher and subscriber.
• Depends on temp, humidity and waterflow.

simplepub.py

• Bare bones publisher, used in RESTcatalog, emulatedsoilpub, device_connector, watering system

simplesub.py

• Bare bones subscriber, used in device_connector, thingspeakConnector,emulatedsoilpub

thingspeakConnector.py

• Displays all the values over time
• Mqtt subscriber to all of the topics, POST data to thingspeak
• https://thingspeak.com/channels/1011118
• saves data to data.json (currently a workaround, but works)

alarm_controller.py

• ●● Mqtt publisher and subscriber
• ●● Subscribes to 'Motion' and 'Temperature' topics data, publishes to 'alarm' topic if a movement is detected or temperature too high

watering_system.py

• Mqtt subscriber
• Subscribes to mqtt topics and controls the waterflow, to keep the soilhumidity at a good level.
• Subscribes to 'Motion' topic and stop the waterflow if a movement is detected.

**dataCollector.py **

• subscribes to mqtt topics and connects the telegram bot

wheatherController.py

• connetcs to an external wheater forecast API
• publishes to wheathertopic

freeboard

• Displays Current temperature, humidity, waterflow and soilhumidity.
• GET requests to home server to get data
• POST requests to save dashboard

Topic descriptions

Wheater topic

polito/01QWRBH/SmartFarm/weatherForecast

mqtt publisher of the wheater forecast

ex json:

{"three": 0, "six": 0, "nine": 1, "twelve": 1, "fifteen": 1, "eighteen": 1, "twenty_one": 1, "twenty_four": 1}

Alarm topic:

polito/01QWRBH/SmartFarm/device1/sensors/alarm

Json only if alarm is raised. Ex:

{'nature': 'Temperature', 'Value': '19.0', 'time': '2020-03-16 17:18:51.008323'}

Humidity topic

polito/01QWRBH/SmartFarm/device1/sensors/humidity

Float every 5.

Soil humidity topic:

polito/01QWRBH/SmartFarm/device1/sensors/soilhumidity

Float every 5, emulated value.

Temp topic:

polito/01QWRBH/SmartFarm/device1/sensors/temperature

Float every 5 seconds

Motion topic:

polito/01QWRBH/SmartFarm/device1/sensors/motion

Bool every 5 seconds, True if motion detected

Ip topic:

polito/01QWRBH/SmartFarm/home/ip

String every 5. Ip of home server

Used for initializing a new connection.

Waterflow topic:

polito/01QWRBH/SmartFarm/device1/outputs/waterflow

Float every 5.

Included libraries

• cherrypy
• json
• paho.mqtt.client
• time
• threading
• from os.path import abspath
• socket
• requests
• math
• from telegram.ext import Updater, CommandHandler
• urllib
• datetime
• Adafruit_DHT
• RPi.GPIO