Porygon consists of two parts: a digital circuit that is wired between a RasPi and a JoyCon, as well as a script to run that circuit.
For a video of it in action, and some tips on how to put this together, see the announcement post at https://invoked.net/2019-03-26-joycon-circuit/
The parts listed in the circuit:
|PI-IO||raspi||Array of GPIO pins on the raspi, used to toggle analog switches and to drive an I2C bus.|
|DG333A Analog Switch (x2)||digikey||Single Pole, Double Throw switches. To bridge points to COL, emulating a button press.|
|MCP4725 (x2)||sparkfun||Digital Analog Converters. The pi sends a signal here to output a variable voltage, which will emulate what the joystick does. I bought breakout boards instead of the chip itself to make soldering easier.|
To actually get the inputs going, you'll need shell access to the PI in your circuit. Then,
git clone https://github.com/moribellamy/porygon.git cd porygon python3 -m virtualenv venv . venv/bin/activate pip install -r requirements.txt
If your circuit diagram varies from the one documented here, there are some settings you can put in
config.ini. This is if you didn't use the same pin numbers on your PI GPIO array, or if your
power source isn't a clean five volts.
Then you are in control!
from porygon import * import time tilt_x(100) # Go left a while! time.sleep(1) still() # Zero out the joystick. press(A) press(X) # And so forth.
For an example end to end script, which takes input from a webcam, read
More games and automations could be added. Use
py.test to run all of the tests.