Arnov Sharma
Published © MIT

JOYCON Button and Analog Stick Board

Joycon is a free-to-use button board that we can use for making XYZ stuff that requires the use of buttons or an analog joystick.

BeginnerFull instructions provided1 hour261
JOYCON Button and Analog Stick Board

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Schematics

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Code

code

C/C++
#include <BleGamepad.h>
#include <FastLED.h>

CRGB leds[13];
BleGamepad bleGamepad("ESP Controller", "ElectroPoint4u", 100);

// TRIGGER BUTTONS
#define LT 2
#define RT 23

// LEFT-JOYSTICK
#define LH 34
#define LV 35
#define LS 15

// RIGHT-JOYSTICK
#define RH 22    //39
#define RV 0     //36
#define RS 19

// D-PAD
#define L1 32
#define L2 33
#define L3 27
#define L4 14

#define R1 18
#define R2 5
#define R3 17
#define R4 16

// BATTERY VOLTAGE
#define ADC 4

// NEOPIXEL
#define DATA_PIN 13

// PERIFERALS
//  #define MIC 25
//  #define SPEAKER 26

int buttons[8] = {32, 33, 27, 14, 18, 5, 17, 16};

int period = 1000;
unsigned long time_now = 0;

const int numberOfPotSamples = 5;     // Number of pot samples to take (to smooth the values)
const int delayBetweenSamples = 2;    // Delay in milliseconds between pot samples
const int delayBetweenHIDReports = 5; // Additional delay in milliseconds between HID reports
const int debounceDelay = 10;        // Delay in milliseconds between button press

int previousButton1State = HIGH;
int previousButton2State = HIGH;
int previousButton3State = HIGH;
int previousButton4State = HIGH;

void setup() {
  Serial.begin(115200);
  FastLED.addLeds<NEOPIXEL, DATA_PIN>(leds, 6);
  FastLED.setBrightness(64);
  for (int i = 0; i < 8; i++) {
    pinMode(buttons[i], INPUT_PULLUP);
  }
  pinMode(LT, INPUT_PULLUP);
  pinMode(RT, INPUT_PULLUP);
  pinMode(LS, INPUT_PULLUP);
  pinMode(RS, INPUT_PULLUP);
  bleGamepad.begin();
  Serial.println("Starting BLE work!");

  leds[0] = CRGB::Blue;
  leds[5] = CRGB::Blue;
  FastLED.show();
  delay(200);
  leds[1] = CRGB::Blue;
  leds[4] = CRGB::Blue;
  FastLED.show();
  delay(300);
  leds[2] = CRGB::Blue;
  leds[3] = CRGB::Blue;
  FastLED.show();
  delay(1000);
  FastLED.clear();
  FastLED.show();
}

void loop() {
  if (bleGamepad.isConnected()) {
    for (int i = 0; i < 6; i++) {
      leds[i] = CHSV( HUE_GREEN, 255, 64);
    }
    FastLED.show();
    while (millis() > time_now + period) {
      Serial.println("Checking Battery Level");
      batteryLevel();
      time_now = millis();
    }
    int currentButton1State = digitalRead(R1);
    int currentButton2State = digitalRead(R2);
    int currentButton3State = digitalRead(R3);
    int currentButton4State = digitalRead(R4);

    if (currentButton1State != previousButton1State) {
      if (currentButton1State == LOW)
        bleGamepad.press(BUTTON_5);
      else
        bleGamepad.release(BUTTON_5);
    }
    previousButton1State = currentButton1State;

    if (currentButton2State != previousButton2State) {
      if (currentButton2State == LOW)
        bleGamepad.press(BUTTON_2);
      else
        bleGamepad.release(BUTTON_2);
    }
    previousButton2State = currentButton2State;

    if (currentButton3State != previousButton3State) {
      if (currentButton3State == LOW)
        bleGamepad.press(BUTTON_1);
      else
        bleGamepad.release(BUTTON_1);
    }
    previousButton3State = currentButton3State;

    if (currentButton4State != previousButton4State) {
      if (currentButton4State == LOW)
        bleGamepad.press(BUTTON_4);
      else
        bleGamepad.release(BUTTON_4);
    }
    previousButton4State = currentButton4State;

    if (digitalRead(LS) == LOW) {
      Serial.println("Left Joystick");
      bleGamepad.press(BUTTON_6);
      delay(debounceDelay);
      bleGamepad.release(BUTTON_6);
    }
    if (digitalRead(RS) == LOW) {
      Serial.println("Right Joystick");
      bleGamepad.press(BUTTON_3);
      delay(debounceDelay);
      bleGamepad.release(BUTTON_3);
    }

    if (digitalRead(LT) == HIGH) {
      Serial.println("Left trigger");
      bleGamepad.press(BUTTON_7);
      delay(debounceDelay);
      bleGamepad.release(BUTTON_7);
    }
    if (digitalRead(RT) == LOW) {
      Serial.println("Right trigger");
      bleGamepad.press(BUTTON_8);
      delay(debounceDelay);
      bleGamepad.release(BUTTON_8);
    }

    int potValues[numberOfPotSamples];
    for (int i = 0 ; i < numberOfPotSamples ; i++) {
      potValues[i] = analogRead(LH);
      delay(delayBetweenSamples);
    }
    int potValue = 0;
    for (int i = 0 ; i < numberOfPotSamples ; i++) {
      potValue += potValues[i];
    }
    potValue = potValue / numberOfPotSamples;
    int adjustedValue = map(potValue, 0, 4095, 127, -127);


    int potValues2[numberOfPotSamples];
    for (int i = 0 ; i < numberOfPotSamples ; i++) {
      potValues2[i] = analogRead(LV);
      delay(delayBetweenSamples);
    }
    int potValue2 = 0;
    for (int i = 0 ; i < numberOfPotSamples ; i++) {
      potValue2 += potValues2[i];
    }
    potValue2 = potValue2 / numberOfPotSamples;
    int adjustedValue2 = map(potValue2, 0, 4095, 127, -127);


    int potValues3[numberOfPotSamples];
    for (int i = 0 ; i < numberOfPotSamples ; i++) {
      potValues3[i] = analogRead(RH);
      delay(delayBetweenSamples);
    }
    int potValue3 = 0;
    for (int i = 0 ; i < numberOfPotSamples ; i++) {
      potValue3 += potValues3[i];
    }
    potValue3 = potValue3 / numberOfPotSamples;
    int adjustedValue3 = map(potValue3, 0, 4095, 255, 0);


    int potValues4[numberOfPotSamples];
    for (int i = 0 ; i < numberOfPotSamples ; i++) {
      potValues4[i] = analogRead(RV);
      delay(delayBetweenSamples);
    }
    int potValue4 = 0;
    for (int i = 0 ; i < numberOfPotSamples ; i++) {
      potValue4 += potValues4[i];
    }
    potValue4 = potValue4 / numberOfPotSamples;
    int adjustedValue4 = map(potValue4, 0, 4095, 255, 0);
    /*
      Serial.print(adjustedValue);
      Serial.print(" || ");
      Serial.print(adjustedValue2);
      Serial.print(" || ");
      Serial.print(adjustedValue3);
      Serial.print(" || ");
      Serial.println(adjustedValue4);
    */
    bleGamepad.setAxes(adjustedValue, adjustedValue2, 0, 0, adjustedValue3, adjustedValue4, DPAD_CENTERED);
    delay(delayBetweenHIDReports);

    if (digitalRead(L1) == LOW)
      bleGamepad.setAxes(adjustedValue, adjustedValue2, 0, 0, adjustedValue3, adjustedValue4, DPAD_UP);
    if (digitalRead(L2) == LOW)
      bleGamepad.setAxes(adjustedValue, adjustedValue2, 0, 0, adjustedValue3, adjustedValue4, DPAD_LEFT);
    if (digitalRead(L3) == LOW)
      bleGamepad.setAxes(adjustedValue, adjustedValue2, 0, 0, adjustedValue3, adjustedValue4, DPAD_DOWN);
    if (digitalRead(L4) == LOW)
      bleGamepad.setAxes(adjustedValue, adjustedValue2, 0, 0, adjustedValue3, adjustedValue4, DPAD_RIGHT);
  }
}

void batteryLevel() {
  int sensorValue = analogRead(ADC);
  float voltage = sensorValue * (5.12 / 4095.0);
  Serial.print(voltage);
  Serial.print("V ||");
  int percentage = (voltage / 4.2) * 100;
  Serial.print(percentage);
  Serial.println("%");
  bleGamepad.setBatteryLevel(percentage);
  if (percentage < 60) {
    Serial.println("LOW battery");
    for (uint8_t i = 30; i < 220; i++) {
      for (int j = 0; j < 6; j++) {
        leds[j] = CHSV( HUE_RED, 255, i);
      }
      FastLED.show();
      delay(15);
    }
    for (uint8_t i = 220; i > 30; i--) {
      for (int j = 0; j < 6; j++) {
        leds[j] = CHSV( HUE_RED, 255, i);
      }
      FastLED.show();
      delay(15);
    }
  }
}

Credits

Arnov Sharma

Arnov Sharma

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