Bluetooth send numbers to arduino

MIT App Inventor Help
1

Hi i have program that change color and brightness by writing number 1-100 for brightness and 101-109 for colors.In blocks i tried many thinks but everytime i send it from app to arduino its doesnt show in serial monitor like "101" but in 1 0 1 or ASCI character can somebody help me?

2

AI2 has a SendBytes bluetooth block that will send a list of byte values (0-255).
Send a make a list block with your 2 values, and receive them as byte values (0-155) in your sketch.

Post your sketch and your blocks for further advice.

3

Do you mean this? Because it doesnt work either.
image

4

The sending part looks okay.

So let's see the receiving part, your sketch.

5

recieving part is

#include <Adafruit_NeoPixel.h>

#define LED_PIN    5 //PIN PRE LEDKY
#define LED_COUNT 47 //POČET LEDIEK


enum {
  RAINBOW = 101,
  GREEN,//102
  RED,//103
  BLUE,//104
  WHITE,//105
  YELLOW,//106
  MAGENTA,//107
  CYAN,//108
  OFF//109
};


Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);

//int k;
//int val;
int currentStatus;          // urcuje aktualnu farbu - hodnota prijata zo serioveho portu
String buff;                // prijate byty a ulozi String
int output = 0;             // pomocna premenna, ktora uchovava v sebe hodnotu pred pridelenim do hlavnej (brightness alebo currentStatus)
int brightness = 255;       // jas
long hue = 0;               // hodnota aktualnej farby - pre rainbow
int currentLed = 0;         // sleduje poziciu LED, s ktorou sa prave pracuje
bool resetLoop = false;     // uchovava informaciu, ci sa "cyklus" ma zacat od znova 


void rainbow_new(int wait);
void colorWipe_new(uint32_t color, int wait);


void setup()
{
  
  Serial.begin(9600);
  /*
#if defined(__AVR_ATtiny85__) && (F_CPU == 16000000)
  clock_prescale_set(clock_div_1);
#endif
  */

  strip.begin();
  strip.show();
  strip.setBrightness(brightness); //JAS

  //colorWipe(strip.Color(0, 255, 0), 50);
}


void loop() //CYKLUS
{
  while (Serial.available() > 0)
  {
    if (resetLoop)
    {
      buff = "";  
      currentStatus = 0;
    }
    //val = Serial.read(); //PREČITANIE SÉRIOVEHO MONITORU
    char temp = Serial.read();
    Serial.print("temp = ");
    Serial.println(temp);

    if (temp != 10)
    {
      buff += temp;
      Serial.print("buff = ");
      Serial.println(buff);
      continue;
    }

    output = buff.toInt();
    if (output >= 0 && output <= 100)
    {
        //strip.setBrightness(brightness);
      brightness = output;
    }
    else  if (output >= 101 && output <= 109)
    {
      currentStatus = output;
    }
    //currentStatus = buff.toInt();
    buff = "";
    Serial.print("currentStatus = ");
    Serial.println(currentStatus);
  }

  strip.setBrightness(brightness);

  switch (currentStatus)
    {
      case RAINBOW:
        rainbow_new(20);
        break;
        
      case RED:
        colorWipe_new(strip.Color(255, 0, 0), 50);
        break;
        
      case GREEN:
        colorWipe_new(strip.Color(0, 255, 0), 50);
        break;
        
      case BLUE:
        colorWipe_new(strip.Color(0, 0, 255), 50);
        break;
        
      case WHITE:
        colorWipe_new(strip.Color(255, 255, 255), 50);
        break;
        
      case YELLOW:
        colorWipe_new(strip.Color(255, 255, 0), 50);
        break;

      case MAGENTA:
        colorWipe_new(strip.Color(255, 0, 255), 50);
        break;

      case CYAN:
        colorWipe_new(strip.Color(0, 255, 255), 50);
        break;
        
      case OFF:
        colorWipe_new(strip.Color(0, 0, 0), 50);
        break;

      default:
      
        break;

    }
}

void rainbow_new(int wait) {
  
  if ((hue >= 5 * 65536) || (resetLoop))
  {
    hue = 0;
  }

  if ((currentLed == strip.numPixels()) || (resetLoop))
  {
    currentLed = 0;
  }
  
  int pixelHue = hue + (currentLed / strip.numPixels());
  strip.setPixelColor(currentLed, strip.gamma32(strip.ColorHSV(pixelHue)));

  hue += 256;
  currentLed++;
  resetLoop = false;
  
  strip.show();
  delay(wait);
  Serial.println(hue/5);
}

void colorWipe_new(uint32_t color, int wait) {
  if ((currentLed == strip.numPixels()) || (resetLoop))
  {
    currentLed = 0;
  }
  
  strip.setPixelColor(currentLed, color);

  resetLoop = false;
  currentLed++;
  strip.show();
  delay(wait);
}
6

Try sending the light blue math number block for 102, instead of the red(purple?) text block for 102.

I am guessing that the BlueTooth SendOneByte block is sensitive to its input block type, unlike the AI2 math blocks. Its tool tip might be informative.

Let us know if that helps?