スマホを傾けてコントロール！ Blynk で BLE 制御ラジコン

本記事にはアフィリエイト広告が含まれます。

以前BlynkのBLE通信でコントロールするラジコンを作りました。

Blynk で BLE 制御ラジコン！

Blynkにアップデート(v0.4.4)がありBLE通信がβ版ではなく正式に導入され、さらにはスマートフォンの加速度センサ情報が取得できるようになってましたのでスマホを傾けてコントロールするラジコンに改造してみました。

ハードは全くいじっておりません(^o^)。

Blynk Arduino用ライブラリ

最新ライブラリは以下にあります。
　https://github.com/blynkkk/blynk-library

マイコンはAdafruit Feather 32u4 Bluefruit LEを使うので
[スケッチの例] -> [Blynk] -> [Boards_Bluetooth]-> [Adafruit_Feather_32u4_BLE]を参考にコード生成しました。

Blynk設定

新規プロジェクトを作成します。HARDWRE MODELはAdafruit製品がまだないのでとりあえずArduino UNOを選択。
CONNECTION TYPEはBLEを選択。
AUTH TOKENはArduinoコード生成時に使用しますので控えときます(もしくはメール送信します)。

ウィジェットとしてBLEとAccelerometer(加速度センサ)を配置します。

AccelerometerウィジットはBlynkアプリを入れたスマホの加速度センサの値を検出し、ここではヴァーチャルピンV0に出力するようにしました。

Arduino IDE

[スケッチの例] -> [Blynk] -> [Boards_Bluetooth]-> [Adafruit_Feather_32u4_BLE]を参考にコード生成しました。

/**************************************************************
 * Blynk is a platform with iOS and Android apps to control
 * Arduino, Raspberry Pi and the likes over the Internet.
 * You can easily build graphic interfaces for all your
 * projects by simply dragging and dropping widgets.
 *
 *   Downloads, docs, tutorials: http://www.blynk.cc
 *   Blynk community:            http://community.blynk.cc
 *   Social networks:            http://www.fb.com/blynkapp
 *                               http://twitter.com/blynk_app
 *
 * Blynk library is licensed under MIT license
 * This example code is in public domain.
 *
 **************************************************************
 *
 * This example shows how to use Adafruit Feather 32u4 BLE
 * to connect your project to Blynk.
 *
 * For this example you need Adafruit BluefruitLE nRF51 library
 *   from http://librarymanager
 *   or https://github.com/adafruit/Adafruit_BluefruitLE_nRF51
 *
 * NOTE: BLE support is in beta!
 *
 **************************************************************/

//#define BLYNK_DEBUG
#define BLYNK_PRINT Serial

#define BLYNK_USE_DIRECT_CONNECT

#include <BlynkSimpleSerialBLE.h>
#include <SPI.h>
#include <Adafruit_BLE.h>
#include <Adafruit_BluefruitLE_SPI.h>

// You should get Auth Token in the Blynk App.
// Go to the Project Settings (nut icon).
char auth[] = "BlynkアプリのYourAuthTokenを入力";

// SHARED SPI SETTINGS (see adafruit webpages for details)
#define BLUEFRUIT_SPI_CS               8
#define BLUEFRUIT_SPI_IRQ              7
#define BLUEFRUIT_SPI_RST              4    // Optional but recommended, set to -1 if unused
#define BLUEFRUIT_VERBOSE_MODE         true

// Create ble instance, see pinouts above
Adafruit_BluefruitLE_SPI ble(BLUEFRUIT_SPI_CS, BLUEFRUIT_SPI_IRQ, BLUEFRUIT_SPI_RST);

//pin name
const int  forwardL = 11;
const int  rearL = 10;
const int  forwardR = 5;
const int  rearR = 6;

long Speed;
long SpeedL, SpeedR;


BLYNK_WRITE(V0) {
  int x = param[0].asFloat();
  int y = param[1].asFloat();
  

  x = map(x, -10, 10, 255, -255);
  y = map(y, -10, 10, 255, -255);

  Serial.print("x: ");
  Serial.print(x);
  Serial.print("  y: ");
  Serial.print(y);

  Speed = sqrt(x*x+y*y);
  if(Speed > 255){
    Speed = 255;
  }
  Serial.print("  Speed: ");
  Serial.println(Speed);

  if(y >= 0){
    if(x >= 0){
      SpeedL = 0;
      SpeedR = abs(x);
    }else{
      SpeedL = abs(x);
      SpeedR = 0;
    }
    analogWrite(forwardL, Speed - SpeedL);
    analogWrite(rearL, 0);
    analogWrite(forwardR, Speed - SpeedR);
    analogWrite(rearR, 0);
  }else{
    if(x >= 0){
      SpeedL = 0;
      SpeedR = abs(x);
    }else{
      SpeedL = abs(x);
      SpeedR = 0;
    }
    analogWrite(forwardL, 0);
    analogWrite(rearL, Speed - SpeedL);
    analogWrite(forwardR, 0);
    analogWrite(rearR, Speed - SpeedR);
  }
}

void setup() {
  Serial.begin(9600);

  ble.begin(BLUEFRUIT_VERBOSE_MODE);
  ble.factoryReset(); // Optional
  ble.setMode(BLUEFRUIT_MODE_DATA);
  
  Blynk.begin(auth, ble);
}

void loop() {
  Blynk.run();
}

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/**************************************************************

* Blynk is a platform with iOS and Android apps to control

* Arduino, Raspberry Pi and the likes over the Internet.

* You can easily build graphic interfaces for all your

* projects by simply dragging and dropping widgets.

* Downloads, docs, tutorials: http://www.blynk.cc

* Blynk community: http://community.blynk.cc

* Social networks: http://www.fb.com/blynkapp

* http://twitter.com/blynk_app

* Blynk library is licensed under MIT license

* This example code is in public domain.

**************************************************************

* This example shows how to use Adafruit Feather 32u4 BLE

* to connect your project to Blynk.

* For this example you need Adafruit BluefruitLE nRF51 library

* from http://librarymanager

* or https://github.com/adafruit/Adafruit_BluefruitLE_nRF51

* NOTE: BLE support is in beta!

**************************************************************/

//#define BLYNK_DEBUG

#define BLYNK_PRINT Serial

#define BLYNK_USE_DIRECT_CONNECT

#include <BlynkSimpleSerialBLE.h>

#include <SPI.h>

#include <Adafruit_BLE.h>

#include <Adafruit_BluefruitLE_SPI.h>

// You should get Auth Token in the Blynk App.

// Go to the Project Settings (nut icon).

char auth[] = "BlynkアプリのYourAuthTokenを入力";

// SHARED SPI SETTINGS (see adafruit webpages for details)

#define BLUEFRUIT_SPI_CS 8

#define BLUEFRUIT_SPI_IRQ 7

#define BLUEFRUIT_SPI_RST 4 // Optional but recommended, set to -1 if unused

#define BLUEFRUIT_VERBOSE_MODE true

// Create ble instance, see pinouts above

Adafruit_BluefruitLE_SPI ble(BLUEFRUIT_SPI_CS, BLUEFRUIT_SPI_IRQ, BLUEFRUIT_SPI_RST);

//pin name

const int forwardL = 11;

const int rearL = 10;

const int forwardR = 5;

const int rearR = 6;

long Speed;

long SpeedL, SpeedR;

BLYNK_WRITE(V0) {

int x = param[0].asFloat();

int y = param[1].asFloat();

x = map(x, -10, 10, 255, -255);

y = map(y, -10, 10, 255, -255);

Serial.print("x: ");

Serial.print(x);

Serial.print(" y: ");

Serial.print(y);

Speed = sqrt(x*x+y*y);

if(Speed > 255){

Speed = 255;

}

Serial.print(" Speed: ");

Serial.println(Speed);

if(y >= 0){

if(x >= 0){

SpeedL = 0;

SpeedR = abs(x);

}else{

SpeedL = abs(x);

SpeedR = 0;

}

analogWrite(forwardL, Speed - SpeedL);

analogWrite(rearL, 0);

analogWrite(forwardR, Speed - SpeedR);

analogWrite(rearR, 0);

}else{

if(x >= 0){

SpeedL = 0;

SpeedR = abs(x);

}else{

SpeedL = abs(x);

SpeedR = 0;

}

analogWrite(forwardL, 0);

analogWrite(rearL, Speed - SpeedL);

analogWrite(forwardR, 0);

analogWrite(rearR, Speed - SpeedR);

}

void setup() {

Serial.begin(9600);

ble.begin(BLUEFRUIT_VERBOSE_MODE);

ble.factoryReset(); // Optional

ble.setMode(BLUEFRUIT_MODE_DATA);

Blynk.begin(auth, ble);

}

void loop() {

Blynk.run();

}

スマホの画面水平方向の(重力)加速度値[x, y]でラジコンを操作します。

Blynk BLE接続

BlynkプロジェクトのBLEウェジットをクリックして設定します。

“Connect BLE device”をクリックして “Adafruit Bluefruit LE”が表示されたらOKをクリックして接続する。

動作

#blynk #ble

Home Made Garbageさん(@homemadegarbage)が投稿した動画 – 2017 1月 29 5:09午前 PST

#ble #blynk

Home Made Garbageさん(@homemadegarbage)が投稿した動画 – 2017 1月 29 5:06午前 PST

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Home Made Garbageさん(@homemadegarbage)が投稿した動画 – 2017 1月 29 5:07午前 PST

Blynkのおかげでスマホとデバイスの連携がめちゃくちゃ簡単にできるので色々なことが直感的にサクサクできそうです♪