ESP32 ESP8266 Pong game with ESP-NOW via peer to peer 2 players with remote control paddle.

Components and Roles
1. Two Wemos D1 Mini Pro Devices (Player Controllers):
o Each ESP8266 Wemos D1 Mini-Pro reads the position of a potentiometer.
o The potentiometer's position represents the paddle's vertical position on the Pong game.
o Each ESP8266 Wemos D1 Mini-Pro sends its paddle position data wirelessly to the ESP32-C3 using ESP-NOW.
2. ESP32-C3 (Game Host with OLED Display):
o Receives the paddle position data from both Wemos devices via ESP-NOW.
o Updates the game logic (ball movement, collision detection, scoring).
o Displays the current game state (paddles, ball, and scores) on an OLED screen.
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How it Works
1. Setup Phase:
o The Wemos devices and ESP32-C3 initialize ESP-NOW communication.
o Each Wemos sets the ESP32-C3 as a peer (receiver).
o The ESP32-C3 sets up to receive data from both Wemos devices and starts the game logic.
2. Gameplay Loop:
o Wemos Controllers:
 Each Wemos continuously reads the analog value from its potentiometer, representing the paddle's vertical position.
 The paddle position is sent to the ESP32-C3 using ESP-NOW.
o ESP32-C3:
 Receives paddle position data from both Wemos devices.
 Processes the game logic:
 Moves the paddles to the received positions.
 Updates the ball's position based on its velocity and checks for collisions with paddles or walls.
 Updates scores when the ball passes a player's paddle.
 Displays the updated game state on the OLED screen.
3. Interaction:
o Players move their potentiometers to control their paddles.
o The ESP32-C3 handles the game's physics and ensures smooth gameplay displayed on the OLED.
4. End of Game:
o The game continues until a predefined score is reached (e.g., 10 points).
o The OLED displays the winner and resets for the next game.
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Key Technologies
1. ESP-NOW Communication:
o A fast, connectionless wireless communication protocol for low-latency data transfer.
o Allows the Wemos controllers to send data directly to the ESP32-C3 without requiring Wi-Fi.
2. OLED Display:
o Used by the ESP32-C3 to visualize the game (paddles, ball, scores).
3. Potentiometers:
o Provide analog input to control paddle positions.
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This setup efficiently splits responsibilities between controllers and the game host, ensuring responsive gameplay and simple code organization.
Adjust Ball Speed
1. Locate the Ball Velocity Variables: Look for variables like ballSpeedX and ballSpeedY (or similar names) in the ESP32-C3 code where the game logic is implemented.
float ballSpeedX = 2.0; // Horizontal speed
float ballSpeedY = 2.0; // Vertical speed
2. Increase the Values:
Increment the speed values to make the ball move faster.
For example, change 2.0 to 4.0 for a noticeable speed boost.

if (collisionWithPaddle) {
ballSpeedX *= 1.1; // Increase horizontal speed by 10%
ballSpeedY *= 1.1; // Increase vertical speed by 10%
}
Where to Make Changes
• Inside the Game Logic:
The ball's position is updated using the velocity variables in the game loop. For example:
ballX += ballSpeedX;
ballY += ballSpeedY;
Adjust ballSpeedX and ballSpeedY as needed to control speed.

Code:
https://github.com/ukkokalevala/PongG...