make_drone_controller

DJI Flight Simulator

Manual

14 buttons

BOM

Item	Qty	Price/p	Link
Seeeduino Xiao	1	5.40 USD	Seeed
IO Expander MCP23017	1	1.44USD	Aliexpress
Push switch MS312	12	1 USD	Sato Denki
Toggle switch 3P MS500EB momentary(ON)-OFF-(ON)	1	2 USD	Sato Denki
Joystick	2	9 USD/5p	Amazon

I2C I/O Expander MCP23017

Xiao: 11 pins
- 2x2 pin for analog Joysticks(L R)
- 7 pins left
  - 7 buttons or 3x4=12 matrix buttons

MCP23017

datasheet

Xiao -(I2C)- MCP23017- 16 pins

Pin Name	Pin No.
GPA0	0
GPA1	1
GPA2	2
GPA3	3
GPA4	4
GPA5	5
GPA6	6
GPA7	7
GPB0	8
GPB1	9
GPB2	10
GPB3	11
GPB4	12
GPB5	13
GPB6	14
GPB7	15

Library

Adafruit MCP23017 Arduino Library

#include <Wire.h>
#include <Adafruit_MCP23017.h>
Adafruit_MCP23017 mcp;
//Adafruit_MCP23017 mcp1;// add more secondary


/*Expander I2C address
  A0 A1 A2 address
  0  0  0  0x00
  1  0  0  0x01
  0  1  0  0x02
  1  1  0  0x03
  0  0  1  0x04
  1  0  1  0x05
  0  1  1  0x06
  1  1  1  0x07
*/
void setup(){
  mcp.begin();// use default address 0
  //mcp1.begin(0x01);// use other address

  mcp.pinMode(0, INPUT);
  mcp.pullUp (0, HIGH); // turn on a 100K pullup internally
  // mcp1.pinMode(0, OUTPUT);//if output
}

uint8_t Key0;

void loop(){
  Key0 = mcp.digitalRead(0);
  //Key16 = mcp1.analogRead(0);//if analog

  if (Key0 == LOW ){
    Key0_act();
  }
}

void Key0_act() {
  //key command
}

Analog Joystick

// Right Joystick
int vertPin_R = 9;   // Analog output of Vertical joystick pin
int horzPin_R = 10;  // Analog output of horizontal joystick pin

int vertValue_R, horzValue_R;

int threshold_small = 300;
int threshold_large = 800;

void loop(){
  vertValue_R = analogRead(vertPin_R);
  horzValue_R = analogRead(horzPin_R);

  if (horzValue_R < threshold_small) {
    //Serial.print("<<:"); Serial.println(horzValue_R);//check direction
    Key0_act(); //<
  }
  if (horzValue_R > threshold_large) {
    //Serial.print(">>:"); Serial.println(horzValue_R);
    Key1_act(); //>
  }
  if (vertValue_R < threshold_small / 1.1) {
    //Serial.print("UP:"); Serial.println(vertValue_R);
    Key2_act(); //^
  }
  if (vertValue_R > threshold_large) {
    //Serial.print("DN:"); Serial.println(vertValue_R);
    Key3_act(); //v
  }

  void Key0_act() {
    //key command
  }
}

PCB

Eagle sch|brd

Hardware

Program

Library

TinyUSB_Mouse_and_Keyboard

#include <TinyUSB_Mouse_and_Keyboard.h>

Adafruit MCP23017 Arduino Library

#include <Wire.h>
#include <Adafruit_MCP23017.h>

Arduino sketch

download ino

#include <TinyUSB_Mouse_and_Keyboard.h>

//IO Expander
#include <Wire.h>
#include <Adafruit_MCP23017.h>

Adafruit_MCP23017 mcp;


//Joystick pins
int horzPin_R = 0;  // Analog output of horizontal joystick pin
int vertPin_R = 1;
int horzPin_L = 10;  // Analog output of horizontal joystick pin
int vertPin_L = 9;

int vertValue_R, horzValue_R;
int vertValue_L, horzValue_L;

int threshold_small = 300;
int threshold_large = 800;

// Buttons
uint8_t pins[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
uint8_t pincount = sizeof(pins) / sizeof(pins[0]);

uint8_t Key0;
uint8_t Key1;
uint8_t Key2;
uint8_t Key3;
uint8_t Key4;
uint8_t Key5;
uint8_t Key6;
uint8_t Key7;
uint8_t Key8;
uint8_t Key9;
uint8_t Key10;
uint8_t Key11;
uint8_t Key12;
uint8_t Key13;
uint8_t Key14;
uint8_t Key15;

uint8_t KeyXiao2;
uint8_t KeyXiao8;

void setup() {

  //keyboard
  Keyboard.begin();
  Serial.begin(9600);
  pinMode(2, INPUT_PULLUP);//joystick button_R
  pinMode(8, INPUT_PULLUP);//joystick button_L

  /*Expander I2C address
    A0 A1 A2 address
     0  0  0 0x00
     1  0  0 0x01
     0  1  0 0x02
     1  1  0 0x03
     0  0  1 0x04
     1  0  1 0x05
     0  1  1 0x06
     1  1  1 0x07
  */

  //IO Expander
  mcp.begin();// use default address 0
  for (uint8_t i = 0; i < pincount; i++)
  {
    mcp.pinMode(pins[i], INPUT);// mcp.pinMode(0, INPUT);//A0=0,A7=7,B0=8,B7=15
    mcp.pullUp(pins[i], HIGH);  // mcp.pullUp(0, HIGH);// turn on a 100K pullup internally
  }

  pinMode(LED_BUILTIN, OUTPUT);  // use the p13 LED as debugging

}


void loop() {
  //Xiao joystick
  vertValue_R = analogRead(vertPin_R);
  horzValue_R = analogRead(horzPin_R);
  vertValue_L = analogRead(vertPin_L);
  horzValue_L = analogRead(horzPin_L);

  //Xiao button
  KeyXiao2 = digitalRead(2);//joystick button_R
  KeyXiao8 = digitalRead(8);//jopystik button_L
  //KeyXiao3 = digitalRead(3);//empty
  //KeyXiao6 = digitalRead(6);//empty
  //KeyXiao7 = digitalRead(7);//empty

  //IO Expander
  Key0 = mcp.digitalRead(0);
  Key1 = mcp.digitalRead(1);
  Key2 = mcp.digitalRead(2);
  Key3 = mcp.digitalRead(3);
  Key4 = mcp.digitalRead(4);
  Key5 = mcp.digitalRead(5);
  Key6 = mcp.digitalRead(6);
  Key7 = mcp.digitalRead(7);
  Key8 = mcp.digitalRead(8);
  Key9 = mcp.digitalRead(9);
  Key10 = mcp.digitalRead(10);
  Key11 = mcp.digitalRead(11);
  Key12 = mcp.digitalRead(12);
  Key13 = mcp.digitalRead(13);
  Key14 = mcp.digitalRead(14);
  Key15 = mcp.digitalRead(15);

  // Motor ON
  if (vertValue_R > threshold_large && horzValue_R < threshold_small &&
      vertValue_L < threshold_small && horzValue_L < threshold_small)
  {
    Serial.println("Motor ON:");
    Key8_act();
  } else {

    // Joystic right
    if (horzValue_R < threshold_small) {
      Serial.print("<<:"); Serial.println(horzValue_R);
      Key0_act();
    }
    if (horzValue_R > threshold_large) {
      Serial.print(">>:"); Serial.println(horzValue_R);
      Key1_act();
    }
    if (vertValue_R < threshold_small / 1.1) {
      Serial.print("UP:"); Serial.println(vertValue_R);
      Key2_act();
    }
    if (vertValue_R > threshold_large) {
      Serial.print("DN:"); Serial.println(vertValue_R);
      Key3_act();
    }

    //Joystic left
    if (horzValue_L < threshold_small) {
      Serial.print("D>:"); Serial.println(horzValue_L);
      Key4_act();
    }
    if (horzValue_L > threshold_large) {
      Serial.print("<A:"); Serial.println(horzValue_L);
      Key5_act();
    }

    if (vertValue_L < threshold_small) {
      Serial.print("Sv:"); Serial.println(vertValue_L);
      Key6_act();
    }
    if (vertValue_L > threshold_large) {
      Serial.print("W^:"); Serial.println(vertValue_L);
      Key7_act();
    }

    //IO Extention
    if (Key14 == LOW ) {//Pause
      Keyboard.write('p');
      delay(400);
      Keyboard.releaseAll();
      KeyRelease();
    }
    if (Key10 == LOW ) {//Shutter
      Keyboard.write('h');
      delay(400);
      Keyboard.releaseAll();
      KeyRelease();
    }
    if (Key6 == LOW ) {//record/stop
      Keyboard.write('l');
      delay(400);
      Keyboard.releaseAll();
      KeyRelease();
    }
    if (Key8 == LOW ) {//flight route
      Keyboard.write(' ');//space
      delay(400);
      Keyboard.releaseAll();
      KeyRelease();
    }
    if (Key4 == LOW ) {//return home/cancel
      Keyboard.write('o');
      delay(400);
      Keyboard.releaseAll();
      KeyRelease();
    }
    if (Key5 == LOW ) {//jump
      Keyboard.write(' ');//space
      delay(400);
      Keyboard.releaseAll();
      KeyRelease();
    }
    if (Key1 == LOW ) {//custom menu
      Keyboard.press(KEY_RETURN);//enter
      delay(400);
      Keyboard.releaseAll();
      KeyRelease();
    }
    if (Key3 == LOW ) {//Gimbal Upward
      Keyboard.write('r');
      delay(400);
      Keyboard.releaseAll();
      KeyRelease();
    }
    if (Key2 == LOW ) {//Gimbal Down
      Keyboard.write('f');
      delay(400);
      Keyboard.releaseAll();
      KeyRelease();
    }
    if (Key12 == LOW ) {//switch view
      Keyboard.write('c');
      delay(400);
      Keyboard.releaseAll();
      KeyRelease();
    }
    if (Key7 == LOW ) {//flight mode
      Keyboard.write('v');
      delay(400);
      Keyboard.releaseAll();
      KeyRelease();
    }
    if (Key11 == LOW ) {//switch btm drone/pilot
      Keyboard.write('j');
      delay(400);
      Keyboard.releaseAll();
      KeyRelease();
    }
    if (Key9 == LOW ) {//minimap
      Keyboard.write('m');
      delay(400);
      Keyboard.releaseAll();
      KeyRelease();
    }
    if (Key13 == LOW ) {//indroducton panel
      Keyboard.write('i');
      delay(400);
      Keyboard.releaseAll();
      KeyRelease();
    }
    if (Key0 == LOW ) {
      // not connected
    }
    if (Key15 == LOW ) {
      // not connected
    }

    if (KeyXiao2 == LOW ) {//joystick button_R
      digitalWrite(LED_BUILTIN, HIGH);
      delay(500);
      digitalWrite(LED_BUILTIN, LOW);
    }
    if (KeyXiao8 == LOW ) {//joystick button_L
      digitalWrite(LED_BUILTIN, HIGH);
      delay(500);
      digitalWrite(LED_BUILTIN, LOW);
    }
  }
}


void Key0_act() {
  Keyboard.press(KEY_LEFT_ARROW);
  delay(400);
  Keyboard.releaseAll();
  KeyRelease();
}

void Key1_act() {
  Keyboard.press(KEY_RIGHT_ARROW);
  delay(400);
  Keyboard.releaseAll();
  KeyRelease();
}

void Key2_act() {
  Keyboard.press(KEY_UP_ARROW);
  delay(400);
  Keyboard.releaseAll();
  KeyRelease();
}

void Key3_act() {
  Keyboard.press(KEY_DOWN_ARROW);
  delay(400);
  Keyboard.releaseAll();
  KeyRelease();
}

void Key4_act() {
  Keyboard.write('d');
  delay(400);
  Keyboard.releaseAll();
  KeyRelease();
}
void Key5_act() {
  Keyboard.write('a');
  delay(400);
  Keyboard.releaseAll();
  KeyRelease();
}
void Key6_act() {
  Keyboard.write('s');
  delay(400);
  Keyboard.releaseAll();
  KeyRelease();
}
void Key7_act() {
  Keyboard.write('w');
  delay(400);
  Keyboard.releaseAll();
  KeyRelease();
}

void Key8_act() {
  Keyboard.press(KEY_LEFT_ARROW);
  Keyboard.press(KEY_DOWN_ARROW);
  Keyboard.write('d');
  Keyboard.write('s');
  delay(400);
  Keyboard.releaseAll();
  KeyRelease();
}

void KeyE0_act() {
  Keyboard.write('0');
  delay(400);
  Keyboard.releaseAll();
  KeyRelease();
}

void KeyRelease() {
  Keyboard.releaseAll();
  delay(500);
}

/*

*/

Last updated:
Contributors

Keys	Action
`?`	Open this help
`n`	Next page
`p`	Previous page
`s`	Search