HELP! App inventor receives chars in ascci mode via bluetooth

[lobelob]

I need to send various data from my arduino to the application via bluetooth.

To send this data I create a buffer of "chars" with the data I need separated by commas. The problem is that when I receive the data via bluetooth, it receives the data in ascii mode (separating each char from the string of chars).

The example I show you is that I send the string of chars = "60,2,2,42,21,37,0" and the app receives via bluetooth = [54,48,44,50,44,50,44,44,52,54,44,50,50...] where each number corresponds to each char sent.

How can I make it send me the chars without the ascii decoding?

Thank you very much

#include <DHT.h>
#include <Wire.h>
#include <SoftwareSerial.h>
#include "Sodaq_DS3231.h"


char buffer[34];
SoftwareSerial bluetooth(2,3);
//.........
void setup() {
  Serial.begin(9600); //inicializaremos la comunicacion a 9600 baudios
  bluetooth.begin(9600);
  dht.begin(); // inicializar sensor dht
  Wire.begin(); //Para el reloj
  rtc.begin();  //Para el reloj
  pinMode(TRIG,OUTPUT);
  pinMode(ECO,INPUT);
 }

void loop(){
  int control = 0;
 humedad1 = (abs((analogRead(analogHum1)/10.23)-100));
  humedad2 = (abs((analogRead(analogHum2)/10.23)-100));
  nivelAgua = medirAgua(alturaDeposito);
  tempAmbiente = dht.readTemperature();
  humedadAmbiente = dht.readHumidity();
  luminosidad = (analogRead(sensorLuz))/10.23;

  sprintf(buffer, "%d,%d,%d,%d,%d,%d,%d", luminosidad ,humedad1, humedad2, humedadAmbiente, tempAmbiente, nivelAgua, control); //preparamos el buffer
  bluetooth.print(buffer); // enviamos el buffer por bluetooth


  delay(100);
}

[ABG]

@lobelob

bluetooth.print(buffer);

This should be println(buffer), to add a \n at message end.

Instead of ReceiveBytes, use ReceiveText, using this Delimiter technique to separate messages:

Please see the Delimiter article in FAQ

FAQ Section: Bluetooth < version 4 (BlueTooth Client) and Arduino

Arduino HC-06 tutorials Arduino USB - Pavitra and Thunkable Arduino via USB Delimiter usage for receiving one message per ReadText DHT22 Temperature or Humidity, no Clock - kio4.com How to send CR the hard way http://www.martyncurrey.com/android-mit-app-inventor-auto-connect-to-bluetooth/ Instructables YouTube course on Arduino/AI2 - Magesh Jayakumar Martyn Arduino Bluetooth sketch Sending Slider Data to Arduino - Neil Kenyon Turning a LED on and off with an Arduino, a HC-06 and Andr…

Be sure to use println() at the end of each message to send from the sending device, to signal end of message. Do not rely on timing for this, which is unreliable.

In the AI2 Designer, set the Delimiter attribute of the BlueTooth Client component to 10 to recognize the End of Line character.

Also, return data is not immediately available after sending a request,
you have to start a Clock Timer repeating and watch for its arrival in the Clock Timer event. The repeat rate of the Clock Timer should be faster than the transmission rate in the sending device, to not flood the AI2 buffers.

In your Clock Timer, you should check

  Is the BlueTooth Client still Connected?
  Is Bytes Available > 0?
     IF Bytes Available > 0 THEN
       set message var  to BT.ReceiveText(-1) 

This takes advantage of a special case in the ReceiveText block:

ReceiveText(numberOfBytes)
Receive text from the connected Bluetooth device. If numberOfBytes is less than 0, read until a delimiter byte value is received.

If you are sending multiple data values per message separated by | or comma, have your message split into a local or global variable for inspection before trying to select list items from it. Test if (length of list(split list result) >= expected list length) before doing any select list item operations, to avoid taking a long walk on a short pier. This bulletproofing is necessary in case your sending device sneaks in some commentary messages with the data values.

[lobelob]

Thank you very much!!!