Arduino Coffee Pot

Let's try to write a kind of arduino sketch and a python script to interface a coffee pot with teh webz !

Requirements

To bind your coffee pot, you'll some pieces of code...

• python-twitter
• pySerial

Technical part

So... i've read the begining of an instructable about this idea. As far as i understood, the guy was talking about a Power switch tail to switch on and off the coffee pot... he gave us a link but i don't really want to pay $25 for this device (+$14 shipping...) given that I bought my coffee pot 10€...

I'll assume that a hypothetical switching circuit has been correctly built and is put between the 13 pin of the arduino and the coffee pot. So, we'll use something like that :

+---------+                                 _____+Vcc
|         |                                   |
|         |       +---------+           +-----------+
|    C    |       |         |           |           |
|    O    |       |    A  13|>---------<| Switching |>--+   __________
|    M    | U S B |    R    |           |  Circuit  |   |  |          )
|    P    |>-----<|    D    |           |           |   |  |         /
|    U    |       |    U    |           +-----------+   |  |   |\_ _/
|    T    |       |    I    |                 |         |  |   |__V__
|    E    |       |    N    |                 |         |  |   |(   )`,
|    R    |       |    O    |                 |         |  |   |(___).'
|         |       |      GND|>--+             |         +--|   `------.     
|         |       +---------+   +-------------+------------/___________\
+---------+                                 __|__GND
                                            /////

Software part

The backend which interact with twitter and control the coffee pot is written in Python. It use python-twitter to interact with the Internet and pyserial (and an arduino board) to discuss with the coffee pot.

How-to connect my coffee pot

So... i'll try to build the correct switching circuit soon. To setup your arduino, just run

$ make && make upload

(make sure to have avr-gcc and avrdude installed)

Then, fill correctly your credentials and of informatios in the SETUP part of the python script and run :

$ python bridge.py

Now, your coffee pot should start every time you send a tweet containing the right tag (default : #givemecoffee) to the account the script is monitoring. To stop the coffeepot, just another tweet containing another tag (default: #thanksforcoffee).

Have fun !