Text-over-Cannon

What it does

Sends data over a cannon by sending colour-coded balls in sequence. A theoretical receiving end would use computer vision to decode the balls back into text.

How we built it

• FastAPI for sending messages to a Raspberry Pi
• gpiozero for motor controls
• SwiftUI for the message client
• Cardboard and hot glue

Challenges we ran into

• Cardboard is a poor material
• We nearly started a fire about 4 times
• Making a list view start at the bottom of the screen in SwiftUI is some really niche problem for some reason???????
• someone tried to steal my monster 3:

Accomplishments that we're proud of

• The gate system (for releasing single balls) somehow actually worked sort of

What we learned

• Having no resistence in your circuits is bad
• Turn off hot glue guns when not in use
• Computer vision is hard

What's next for Text-over-Cannon

• cannon

Built With

• python
• raspberry-pi
• swift