flipper-zero-tutorials/subghz/plugins/rock_paper_scissors/README.md

# Rock Papper Scissors

## Introduction

This is game of Rock, Paper, Scissors. In version 1, we use the subghz radio to find other players, communicate moves, and exchange contact information.

## Status

This is currently a work in progress!

Completed work:

- Most of the game logic is complete (two flippers should be able to play against each other.)
- UI to show Flipper images instead of just debug text.
- Vibro on button press (valid move).
- "Song" when win/loss/draw.
- Show games found & let user pick the game to join.
- Config - Allow changing game number.
- Config - Allow changing frequency.
- Receiving a Join game does an ACK (to cause game on joiner to start).
- Log game results & contact info onto SD card.
- Allow viewing past games/scores.
- A join ACK removes it from the list of available games.
- Config - Allow changing hard-coded CONTACT_INFO message.

Remaining work (for subghz version):

- Config - Allow saving CONTACT_INFO message.
- Refactor the code, so it has less duplication.
- Write tutorial.
- Add game ending animations.

Future ideas:

- Create stand-alone hardware badges that can play the game too.
- Uses Princeton signals for second player.
- Instead of subghz, use IR.
- Instead of subghz, use GPIO.

## Installation Directions

This project is intended to be overlayed on top of an existing firmware repo.

- Clone, Build & Deploy an existing flipper zero firmware repo. See this [tutorial](/firmware/updating/README.md) for updating firmware.
- Copy the "rock_paper_scissors" [folder](..) to the \applications\plugins\rock_paper_scissors folder in your firmware.
- Build & deploy the firmware. See this [tutorial](/firmware/updating/README.md) for updating firmware.
- NOTE: You can also extract the rock_paper_scissors.FAP from resources.tar file and use qFlipper to copy the file to the SD Card/apps/Misc folder.

### Open question - Should we use "applications" or "applications_user"?

## Running the updated firmware

These directions assume you are starting at the flipper desktop. If not, please press the back button until you are at the desktop.

- Press the OK button on the flipper to pull up the main menu.
- Choose "Applications" from the menu.
- Choose "Games" from the sub-menu.
- Choose "Rock Paper Scissors"

- Do the same steps on your second Flipper.

- On Flipper 1, choose "Host game".

  - select a valid frequency. (like "433.92" in US region)
  - choose a game number.
  - click OK button to start game.

- On Flipper 2, choose "Join game".

  - select the same valid frequency as Flipper 1.
  - "game none" should change to show the game number from Flipper 1 & its name.
    -click OK button to join game.

- Once two players are joined:

  - Press "OK" to send "1". The other player should also press "OK" to send "1" back (at the same time!)
  - Press "OK" to send "2". The other player should also press "OK" to send "2" back (at the same time!)
  - Press "UP" to send a "Rock", or "RIGHT" to send a "Paper", or "DOWN" to send a "Scissors". The other player should send at same time!
  - Rules:
    - Rock beats Scissors.
    - Paper beats Rock.
    - Scissors beat Paper.
    - Two identical items tie.

- Short press the BACK button for the main menu.

- Long press the BACK button to exit.

## HackRF One

- If you do not have two Flipper Zero devices, you can use a HackRF One to record messages & broadcast those messages at a future date. I made a [YouTube](https://www.youtube.com/watch?v=S0sgcDQrVOc) video demo of how to record and broadcast messages.

- To record a message: (replace "flipper-chat.rf" with the file name you want to use, such as "select-rock.rf".)

```
sudo hackrf_transfer -r flipper-chat.rf -f 433920000 -s 8000000
```

- To broadcast a message: (replace "flipper-chat.rf" with the saved file name.)

```
sudo hackrf_transfer -r flipper-chat.rf -f 433920000 -s 8000000 -x 47
```

- What I typically do is:
  - Use the Flipper Zero to send a messasge that I record, then I play back that message at a later time when I want to pretend the other Flipper Zero is sending a message. You can use the chat app in https://lab.flipper.net/cli, like shown in the video to send a specific packet (or you can use your own code to create the packet.)
  - Use the HackRF One to record the message from my Fliiper Zero. Then later I use the chat app in https://lab.flipper.net/cli, to see what the message was (or I replay the message to see how my application would respond.)

## Details about the project files

- application.fam

  - specifies the name of our application.
  - specifies the entry point for our application.
  - specifies we use the GUI.
  - specifies our icon is the rock_paper_scissors.png file.
  - specifies our application can be found in the "Game" category.

- rock_paper_scissors.png

  - The icon for our application.

- rock_paper_scissors.c
  - This is the game applcation.

## Example data

- Beacon for game 042:
  RPS:BA042:Lumyphut

- Join game 042:
  RPS:JA042NYourNameHere :Lumyphut

- Join-ack for game 042:
  RPS:AA042NYourNameHere :Lumyphut

- Count 1 for game 042:
  RPS:MA0421:Lumyphut

- Count 2 for game 042:
  RPS:MA0422:Lumyphut

- Rock for game 042:
  RPS:MA042R:Lumyphut

- Paper for game 042:
  RPS:MA042P:Lumyphut

- Scissors for game 042:
  RPS:MA042S:Lumyphut

RPS:AA042NYourNameHere :Lumyphut
123456789 0123456789 = 19bytes.  
60-19 = 41 bytes is max length of name.