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46  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: June 17, 2014, 07:00:55 am
Quote
Hi Kas.
Have briefly tried it and it works ok, will give a thorough test when I have finished my domestic duties today by order of her indoors   smiley-wink

Cheers mate
Vic

Great  smiley
Remember, you can adjust Zero position, max move and motors direction
When you have time, please post a video showing both App screen and moving gimball

47  Using Arduino / Networking, Protocols, and Devices / Pan & Tilt demo on: June 17, 2014, 03:48:56 am
@thornlv
Sorry guy, I was too self confident in modifying the code and not testing it  smiley-red
I just modified my code (reply #354)
Now fully tested on Serial Monitor smiley-wink

Please upgrade and use Joystick BT Commander V5.0
48  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: June 16, 2014, 12:14:22 pm
@thornlv
Quote
Have tried the updated Andro_Pan_Tilt sketch but it did not work.
What happens is the servos centre and when I use the joystick I get a few lines of positions in serial monitor and then 'communication error' repeating lines. MyservoX changes to full 180 position  and stays there (motor whirring) whilst MyservoY does nothing.
Go to settings/About and confirm your actual App version
What is your Arduino board model ??
You don't need to connect motors before you get sensible readings on your Serial Monitor

Quote
BT TX to D0, Servos to 9 and 10 (BT RX not used ?)
Yes, no need to send data back to your phone
49  Using Arduino / Networking, Protocols, and Devices / Version 5.0 ** now available ** on: June 16, 2014, 11:46:13 am
Joystick Bluetooth Commander Version 5.0  has just been published on Google Play

Change log:
 - improved communication protocol  see reply #252
 - smoother Joystick behavior  (thanks Bob1943)
 - automatically flip if the user turns device upside down  (thanks joepro)
 - optimized layout  (thanks billcat)

Demo sketch: AndroTest V2.0       see reply #256

Please let me have feedback, including screenshots

Enjoy   smiley-wink
50  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: June 16, 2014, 10:18:46 am
@tolisn63
Quote
Great, thanks
just a few ideas that maybe can implemented in future releases.
1. Text overlay on the video feed, like a HUD. Instead of printing the arduino sent messages under the video screen  overlay them on the video feed.
Well... to keep it simple, I have Bluetooth and WiFi modules well apart
This is easier for maintenance and upgrade
Text overlay would create modules intricacy

Quote
2. Have an option to switch between the joystick style control and a four directional arrow control.
Nice suggestion
I will first implement the long awaited accelerometer control (tilting the Android device)

Quote
Any idea when Total RC commander will be available with the new protocol and a test sketch ?
Will wait for Joystick BT commander V5.0 feedback
Would say two or three weeks
51  Using Arduino / Networking, Protocols, and Devices / Version 5.0 ** demo sketch ** on: June 15, 2014, 11:56:11 am
This is AndroTest V2.0 demo sketch for Joystick BT Commander V5.x

modified variables
 - STX
 - ETX
 - cmd[8]

modified functions:
 - loop()
 - getJoystickState()
 - getButtonState()

Code:
#define VERSION     "\n\nAndroTest V2.0 - @kas2014\ndemo for V5.x App"

// V2.0  changed to pure ASCII Communication Protocol ** not backward compatible **
// V1.4  improved communication errors handling
// V1.3  renamed for publishing, posted on 09/05/2014
// V1.2  Text display   ** not backward compatible **
// V1.1  Integer display
// V1.0  6 buttons + 4 data char implemented

// Demo setup:
// Button #1 controls pin #13 LED
// Button #4 toggle datafield display rate
// Button #5 configured as "push" button (momentary)
// Other buttons display demo message

// Arduino pin#2 to TX BlueTooth module
// Arduino pin#3 to RX BlueTooth module
// make sure your BT board is set @57600 bps
// better remove SoftSerial for PWM based projects

// For Mega 2560:
// remove   #include "SoftwareSerial.h", SoftwareSerial mySerial(2,3);
// search/replace  mySerial  >> Serial1
// pin#18 to RX bluetooth module, pin#19 to TX bluetooth module

#include "SoftwareSerial.h"

#define    STX          0x02
#define    ETX          0x03
#define    ledPin       13
#define    SLOW         750                            // Datafields refresh rate (ms)
#define    FAST         250                             // Datafields refresh rate (ms)

SoftwareSerial mySerial(2,3);                           // BlueTooth module: pin#2=TX pin#3=RX
byte cmd[8] = {0, 0, 0, 0, 0, 0, 0, 0};                 // bytes received
byte buttonStatus = 0;                                  // first Byte sent to Android device
long previousMillis = 0;                                // will store last time Buttons status was updated
long sendInterval = SLOW;                               // interval between Buttons status transmission (milliseconds)
String displayStatus = "xxxx";                          // message to Android device

void setup()  {
  Serial.begin(57600);
  mySerial.begin(57600);                                // 57600 = max value for softserial
  pinMode(ledPin, OUTPUT);    
  Serial.println(VERSION);
  while(mySerial.available())  mySerial.read();         // empty RX buffer
}

void loop() {
  if(mySerial.available())  {                           // data received from smartphone
    delay(2);
    cmd[0] =  mySerial.read();  
    if(cmd[0] == STX)  {
      int i=1;      
      while(mySerial.available())  {
        delay(1);
        cmd[i] = mySerial.read();
        if(cmd[i]>127 || i>7)                 break;     // Communication error
        if((cmd[i]==ETX) && (i==2 || i==7))   break;     // Button or Joystick data
        i++;
      }
      if     (i==2)          getButtonState(cmd[1]);    // 3 Bytes  ex: < STX "C" ETX >
      else if(i==7)          getJoystickState(cmd);     // 6 Bytes  ex: < STX "200" "180" ETX >
    }
  }
  sendBlueToothData();
}

void sendBlueToothData()  {
  static long previousMillis = 0;                            
  long currentMillis = millis();
  if(currentMillis - previousMillis > sendInterval) {   // send data back to smartphone
    previousMillis = currentMillis;

// Data frame transmitted back from Arduino to Android device:
// < 0X02   Buttons state   0X01   DataField#1   0x04   DataField#2   0x05   DataField#3    0x03 >  
// < 0X02      "01011"      0X01     "120.00"    0x04     "-4500"     0x05  "Motor enabled" 0x03 >    // example

    mySerial.print((char)STX);                                             // Start of Transmission
    mySerial.print(getButtonStatusString());  mySerial.print((char)0x1);   // buttons status feedback
    mySerial.print(GetdataInt1());            mySerial.print((char)0x4);   // datafield #1
    mySerial.print(GetdataFloat2());          mySerial.print((char)0x5);   // datafield #2
    mySerial.print(displayStatus);                                         // datafield #3
    mySerial.print((char)ETX);                                             // End of Transmission
  }  
}

String getButtonStatusString()  {
  String bStatus = "";
  for(int i=0; i<6; i++)  {
    if(buttonStatus & (B100000 >>i))      bStatus += "1";
    else                                  bStatus += "0";
  }
  return bStatus;
}

int GetdataInt1()  {              // Data dummy values sent to Android device for demo purpose
  static int i= -30;              // Replace with your own code
  i ++;
  if(i >0)    i = -30;
  return i;  
}

float GetdataFloat2()  {           // Data dummy values sent to Android device for demo purpose
  static float i=50;               // Replace with your own code
  i-=.5;
  if(i <-50)    i = 50;
  return i;  
}

void getJoystickState(byte data[8])    {
  int joyX = (data[1]-48)*100 + (data[2]-48)*10 + (data[3]-48);       // obtain the Int from the ASCII representation
  int joyY = (data[4]-48)*100 + (data[5]-48)*10 + (data[6]-48);
  joyX = joyX - 200;                                                  // Offset to avoid
  joyY = joyY - 200;                                                  // transmitting negative numbers

  if(joyX<-100 || joyX>100 || joyY<-100 || joyY>100)     return;      // commmunication error
  
// Your code here ...
    Serial.print("Joystick position:  ");
    Serial.print(joyX);  
    Serial.print(", ");  
    Serial.println(joyY);
}

void getButtonState(int bStatus)  {
  switch (bStatus) {
// -----------------  BUTTON #1  -----------------------
    case 'A':
      buttonStatus |= B000001;        // ON
      Serial.println("\n** Button_1: ON **");
      // your code...      
      displayStatus = "LED <ON>";
      Serial.println(displayStatus);
      digitalWrite(ledPin, HIGH);
      break;
    case 'B':
      buttonStatus &= B111110;        // OFF
      Serial.println("\n** Button_1: OFF **");
      // your code...      
      displayStatus = "LED <OFF>";
      Serial.println(displayStatus);
      digitalWrite(ledPin, LOW);
      break;

// -----------------  BUTTON #2  -----------------------
    case 'C':
      buttonStatus |= B000010;        // ON
      Serial.println("\n** Button_2: ON **");
      // your code...      
      displayStatus = "Button2 <ON>";
      Serial.println(displayStatus);
      break;
    case 'D':
      buttonStatus &= B111101;        // OFF
      Serial.println("\n** Button_2: OFF **");
      // your code...      
      displayStatus = "Button2 <OFF>";
      Serial.println(displayStatus);
      break;

// -----------------  BUTTON #3  -----------------------
    case 'E':
      buttonStatus |= B000100;        // ON
      Serial.println("\n** Button_3: ON **");
      // your code...      
      displayStatus = "Motor #1 enabled"; // Demo text message
      Serial.println(displayStatus);
      break;
    case 'F':
      buttonStatus &= B111011;      // OFF
      Serial.println("\n** Button_3: OFF **");
      // your code...      
      displayStatus = "Motor #1 stopped";
      Serial.println(displayStatus);
      break;

// -----------------  BUTTON #4  -----------------------
    case 'G':
      buttonStatus |= B001000;       // ON
      Serial.println("\n** Button_4: ON **");
      // your code...      
      displayStatus = "Datafield update <FAST>";
      Serial.println(displayStatus);
      sendInterval = FAST;
      break;
    case 'H':
      buttonStatus &= B110111;    // OFF
      Serial.println("\n** Button_4: OFF **");
      // your code...      
      displayStatus = "Datafield update <SLOW>";
      Serial.println(displayStatus);
      sendInterval = SLOW;
     break;

// -----------------  BUTTON #5  -----------------------
    case 'I':           // configured as momentary button
//      buttonStatus |= B010000;        // ON
      Serial.println("\n** Button_5: ++ pushed ++ **");
      // your code...      
      displayStatus = "Button5: <pushed>";
      break;
//   case 'J':
//     buttonStatus &= B101111;        // OFF
//     // your code...      
//     break;

// -----------------  BUTTON #6  -----------------------
    case 'K':
      buttonStatus |= B100000;        // ON
      Serial.println("\n** Button_6: ON **");
      // your code...      
       displayStatus = "Button6 <ON>"; // Demo text message
     break;
    case 'L':
      buttonStatus &= B011111;        // OFF
      Serial.println("\n** Button_6: OFF **");
      // your code...      
      displayStatus = "Button6 <OFF>";
      break;
  }
// ---------------------------------------------------------------
}


52  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: June 15, 2014, 11:28:51 am
Quote
will this protocol also be used in Total RC commander ?
It will

Joystick BT Commander & Total RC commander share the same Bluetooth engine
Total RC commander has WiFi live video atop
53  Using Arduino / Networking, Protocols, and Devices / Version 5.0 ** communication protocol ** on: June 15, 2014, 10:05:40 am
New communication protocol for Joystick BT Commander V5.x

Communication from Android to Arduino                   (or to any microcontroller)

- Joystick information:
Joystick data is transmitted as ASCII data, according to this data frame:
         <STX  "Joy_X + 200"  "Joy_Y + 200"  ETX>

with STX=0x2, ETX=0x3


This is the relevant Android (Java) code snippet from Joystick Bluetooth Commander:
Code:
   final int XvalB = Xval + 200;
    final int YvalB = Yval + 200;
    if((((Xant!=Xval) || (Yant!=Yval)) || (mTimeoutCounter>=mMaxTimeoutCount && mMaxTimeoutCount>-1)))   // joystick position changed, or timeout occurred
     String toSend = String.format("%c%d%d%c", STX, XvalB, YvalB, ETX);
     sendMessage(toSend);

So, for Xval=0 Yval=0:
  XvalB = YvalB = 200
  '2' is Ascii 32 hex (decimal 50)
  '0' is Ascii 30 hex (decimal 48)
Data frame:   <0x02 0x32 0x30 0x30 0x32 0x30 0x30 0x03>

for Xval=100 Yval=100:
  XvalB = YvalB = 300
  '3' is Ascii 33 hex (decimal 51)
  '0' is Ascii 30 hex (decimal 48)
Data frame:   <0x02 0x33 0x30 0x30 0x33 0x30 0x30 0x03>

The data frame is send via BlueTooth to the arduino board and decoded.
This is the Arduino code snippet from AndroTest V2.0:
Code:
void getJoystickState(byte data[8])    {
  int joyX = (data[1]-48)*100 + (data[2]-48)*10 + (data[3]-48);       // obtain an Int from the ASCII representation
  int joyY = (data[4]-48)*100 + (data[5]-48)*10 + (data[6]-48);
  joyX = joyX - 200;                                                  // Offset to avoid
  joyY = joyY - 200;                                                  // transmitting negative numbers
 }


- Button information:
Each time an android button is pressed, the following data frame is transmitted
                <STX  buttonState  ETX>

buttonState is transmitted as a Byte value and reflects the state of the pushed button
Button #1:  ON: 'A'      OFF: 'B'
Button #2: ON: 'C'      OFF: 'D'
Button #3  ...

On the Arduino side, data frame is decoded in getButtonState()
Code:
void getButtonState(int bStatus)  {
  switch (bStatus) {
// -----------------  BUTTON #1  -----------------------
    case 'A':
      buttonStatus |= B000001;        // ON
      Serial.println("\n** Button_1: ON **");
      // your code...      
      break;
    case 'B':
      buttonStatus &= B111110;        // OFF
      Serial.println("\n** Button_1: OFF **");
      // your code...      
      break;

// -----------------  BUTTON #2  -----------------------
    case 'C':
      buttonStatus |= B000010;        // ON
      Serial.println("\n** Button_2: ON **");
      // your code...      
      break;
    case 'D':
      buttonStatus &= B111101;        // OFF
      Serial.println("\n** Button_2: OFF **");
      // your code...      
      break;

    ....
}



Communication back from Arduino to Android:
(same as V4.0)

Arduino code
Code:
void sendBlueToothData()  {

  ....

    mySerial.print((char)STX);                                             // Start of Transmission
    mySerial.print(getButtonStatusString());  mySerial.print((char)0x1);   // buttons status feedback
    mySerial.print(GetdataInt1());            mySerial.print((char)0x4);   // datafield #1
    mySerial.print(GetdataFloat2());          mySerial.print((char)0x5);   // datafield #2
    mySerial.print(displayStatus);                                         // datafield #3
    mySerial.print((char)ETX);                                             // End of Transmission
  
  ....  
}


 Data frame transmitted back from Arduino to Android device:  (by default, every 1000ms)
< STX   Buttons state   0X01   DataField#1   0x04   DataField#2   0x05   DataField#3   ETX >  

example: < 0X02    001011    0X01    120.00    0x04   -4500   0x05   Motor enabled   0x03 >

Button state:
This is a six character string reflecting the Arduino state for buttons position
button #1,#2,#4: ON, all others: OFF   >>>  001011
This feedback avoid any discrepancy with the Android device button state
An Arduino Reset will reinitialize the Android buttons, Two way communication is mandatory for "clean" control
Button state string is created in the getButtonStatusString() function.

Code:
String getButtonStatusString()  {
  String bStatus = "";
  for(i=0; i<6; i++)  {
    if(buttonStatus & B100000 >>i)      bStatus += "1";
    else                                bStatus += "0";
  }
  return bStatus;
}


Datafields:
Data is transmitted as ASCII characters using Serial.print()
Numbers are printed using an ASCII character for each digit
120.00   >>>   0X31, 0X32, 0X30, 0X2E, 0X30, 0X30

So  < 0x02     001011      0x01      120.00     0x04      -4500      0x05     Motor enabled     0x03 >
is actually transmitted as
     < 0x02,   0x30,0x30,0x31,0x30,0x31,0x31,   0X01,   0x31,0x32,0x30,0x2E,0x30,0x30,  
        0x04,  0x2D,0x34,0x35,0x30,0x30,   0x05,   0x4D,0x6F,0x74,0x6F,0x72,0x20,0x65,
        0x6E,0x61,0x62,0x6C,0x65,0x64,  0x03 >

without commas and spaces

Should you have additional questions, let me know  smiley-wink

54  Using Arduino / Networking, Protocols, and Devices / Version 5.0 coming soon on: June 14, 2014, 03:03:17 pm
Version 5.0 to be released

Early Warning

Backgroung:
Initial communication protocol was developped one year ago
At that time the App was simple (two buttons only, joystick values coded on a single Byte, no feedback communication from Arduino to Android)
Time has evolved, with added features, transmitted data amount has rapidly inflated

In some situations (RF noise environment) Arduino may receive erratic values and joystick values may be seen as button commands

Version 5.0 will feature a pure ASCII transmission protocol and definitely address this problem

This new version will be online next week
For those who want to anticipate and start modifying their code,
I will post the new communication protocol, together with the relevant demo sketch (AndroTest V2.0)
55  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: June 14, 2014, 12:06:44 pm
Quote
Would it be possible for you to set it to sensorLandscape instead, that way it will automatically flip if the user turns their device upside down
Thanks joepro for this suggestion, makes a lot of sense, will definitely be included in V5.0


Quote
However the Joystick BT Commander app looks nothing like my UI design/theme, most notably you have a dark theme while my UI uses a "light" theme with a white background.
Let me have the code snippet with your theme definition
56  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: June 13, 2014, 05:04:45 am
@billcat
Quote
But there is just one little problem....have a look at the screenshots  smiley-grin

Second try
Check your mail  smiley-wink
57  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: June 12, 2014, 03:08:17 pm
Quote
But there is just one little problem....have a look at the screenshots  smiley-grin

Oops... Looks pretty much the same  smiley-red
Seems I edited the wrong template
Let me have another try
58  Using Arduino / Networking, Protocols, and Devices / Pan & Tilt demo on: June 12, 2014, 02:07:23 pm
@thornlv

I updated the Andro_Pan&Tilt code to make it compatible with Joystick BT commander V4.0,
should work right out of the box  smiley-wink

EDIT:   now  Android BT Commander V5.x  compatible

Code:
#define VERSION     "\n\nAndro_Pan&Tilt V3.6 - @kas2014\n** Stepper demo for V5.x App **"

// Controls two servo motors

// V3.6: Android BT Commander V5.X compatible, no button data management
// V3.0: Android BT Commander V3.X compatible, no button data management
// V2.5 can receive both Byte & Integer data
// V2.0: removed SoftwareSerial

// Android BT Commander settings:
// Options/Options for advanced users/Data Range        >>>  -100 to +100
// Options/Options for advanced users/Refresh interval  >>>  50ms

//  Arduino pin #0 to TX BlueTooth module
// BT TX to be disconnected from D0 during sketch upload

#include <Servo.h>

boolean    DEBUG =         true;

#define    pinServo_X     9
#define    pinServo_Y     10
#define    STX            0x02
#define    ETX            0x03
#define    MIN_Y          45             // vertical move limitation
#define    MAX_Y          180
#define    ZERO_Y         60             // vertical offset

byte cmd[8] = {0, 0, 0, 0, 0, 0, 0, 0};
Servo myservoX;                         // create servo objects
Servo myservoY;

void setup()  {
  Serial.begin(57600);
  myservoX.attach(pinServo_X);  
  myservoY.attach(pinServo_Y);  
  if(DEBUG)    Serial.println(VERSION);
}

void loop() {
   if(Serial.available())  {                            // data received from smartphone
    delay(2);
    cmd[0] =  Serial.read();  
    if(cmd[0] == STX)  {
      int i=1;      
      while(Serial.available())  {
        delay(1);
        cmd[i] = Serial.read();
        if(cmd[i]>127 || i>7)                 break;     // Communication error
        if((cmd[i]==ETX) && (i==2 || i==7))   break;     // Button or Joystick data
        i++;
      }
      if(i==7)     setServoPosition(cmd);
    }
  }
}

void setServoPosition(byte data[8])    {
  int joyX = (data[1]-48)*100 + (data[2]-48)*10 + (data[3]-48);       // obtain the Int from the ASCII representation
  int joyY = (data[4]-48)*100 + (data[5]-48)*10 + (data[6]-48);
  joyX = joyX - 200;                                                  // Offset to avoid
  joyY = joyY - 200;                                                  // transmitting negative numbers

  if(joyX<-100 || joyX>100 || joyY<-100 || joyY>100)     return;      // commmunication error
  
  joyX = map(joyX, -100, 100, 180, 0);   //  << adjust to change motor direction
  joyY = map(joyY, -100, 100, 0, 180);   //  <<

  joyY+=ZERO_Y;
  joyY = constrain(joyY, MIN_Y, MAX_Y);
  myservoX.write(joyX);
  myservoY.write(joyY);
  if(DEBUG)    {Serial.print(joyX); Serial.print(", "); Serial.println(joyY);}
}

Tell me if it works
59  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: June 12, 2014, 12:13:55 pm
@john_lenfr
Quote
Ok, c'est bien l'appli avec le retour vidéo possible?
oops... désolé  smiley-red

The video App is not yet mainstream and will be available after Joystick BT Commander V5.0 release
Not too familiar with FPV equipment...

Video is acquired by any standalone IP camera, or any Android device with integrated camera + IP webcam App
Stream is sent via WiFi to the App through a router (for IP cameras) or directly (for Android cameras)

I use this mini router

Did you already test Joystick BT Commander V4.0 ??


60  Using Arduino / Networking, Protocols, and Devices / Re: Android Bluetooth joystick on: June 12, 2014, 08:05:53 am
Quote
Hi,
I can't find the Total RC Commander apk on GooglePlay, is that normal?

https://play.google.com/store/apps/details?id=org.projectproto.btjoystick&feature=search_result

Just checked, still there  smiley-wink


I should really change this V1.0 photo  smiley-roll
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