dineshvyas / movementgamecontroller

Wireless movement based game controller. Interfaces a joystick, buttons, 9 DOF IMU, and an ESP8266 WiFi MCU dev board. Programmed with Arduino.

MovementGameController

Wireless movement based game controller.
Interfaces a joystick, buttons, 9 DOF IMU, and an ESP8266 WiFi MCU dev board.
Programmed with Arduino WiFi and I2C Libraries.

About

This is a part of a final project design competition for an Embedded Systems Design Lab. There were other parts to the project, including a console and display that ran a 2P fighting game. This is one part, the game controller, that I programmed, designed the circuit layout, and 3d printed parts for.
The controller uses Madgewick's IMU Algorithm to compute rotational quaternions from the IMU data, and does some simple vector rotation to determine direction of acceleration for the gestures that happened in between transmissions. The directions on the movement gestures need some work, I'm hoping to come back to this project and maybe just use the Espressif ESP IDF.

UDP Packet

Sends a packet in this format over UDP every 20ms:
{D:idnum:q0,q1,q2,q3:x_gesture,y_gesture,z_gesture:y_rot:x_js,y_js:b_primary,b_js,b_3}
Controller id, rotational quaternions, gesture vectors, y rotation (this could have been computed from the quaternions, but y-rot was significant to the game), joystick data, button data.

Parts (links on the way)

ESP8266 12E Makerfocus Dev Board
MPU9255 10DOF IMU - Gyroscope, Accelerometer, Compass
Joystick - 2 axis, potentiometers. There was one ADC so took turns sampling each one.
Large button with built in LED
Small push button
Small ~500mAh PulsePak microusb battery pack

Controller

Circuit Diagram (better one on the way)