coffeefy

Description

Coffeefy let you control a coffee maker via the Internet using a RESTful API provided by an express.js-server. However, this system isn't reliable yet and should run under supervision.

System architecture

Used hardware

• Raspberry Pi 3
• Senseo 7810 Coffee Machine
• HC-SR04 Ultrasonic Sensor
• 3 Relays
• 2 Resistors(680Ohm/1kOhm)
• minor small parts (optional breadboard, wires etc.)

Installation

• clone repository
• navigate to ./node
• run npm install to install the dependencies
• To start the webserver, run: nodemon app or node ./bin/www
• open http://localhost:3000 in your browser

You can run Coffeefy as a daemon service using "forever". (see below) After Installation you can start the node.js server by running forever start ./bin/www. To see what's going on, determine the logfile path by running forever list and run tail -f <logfilepath>

(Instructions for running ultrasonic.py in background)

Required Python libraries

• RPi.GPIO via sudo apt-get install rpi.gpio
• paho-mqtt via pip install paho-mqtt

Useful node.js modules and other ressources

• mqtt.js
• python-shell
• Correct usage of GPIO.cleanup()
• Running a node js server.. forever(Github-Repo)
• nodemon monitors for any changes in source, restarts the server automatically if necessary.

Troubleshooting

• Installing paho-mqtt causes an error. Missing "Python.h"? → Install the python developer package via apt-get install python2.7-dev.
• node app.js results in a crash. → I dunno Y, just install nodemon via npm. → node ./bin/www

Authors

Vanakh Chea, Alexander Thürling, René Honnen, Christian Krenn

License

GNU