Bluetooth HC-06. Arduino. Send. Receive. Send text file. Multitouch. Image

[Juan_Antonio]

@Felipe_Carvalho
Open a new topic and show your work, code, drawings, devices used ...

Check example:
8.- App receives data from Arduino. Clock.Interval. Arduino delay. Buffer.

[Felipe_Carvalho]

Estou precisando fazer com que no aplicativo comunique com o arduino a partir dessa programação:
#include <LiquidCrystal.h>

float vazao; //Variável para armazenar o valor em L/min
float media = 0; //Variável para fazer a média
int contaPulso; //Variável para a quantidade de pulsos
int i = 0; //Variável para segundos
int Min = 00; //Variável para minutos
float Litros = 0; //Variável para Quantidade de agua
float MiliLitros = 0; //Variavel para Conversão

LiquidCrystal lcd(8, 7, 6, 5, 4, 3);

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

lcd.begin(16, 2);
lcd.setCursor( 0, 0);
lcd.print("Sensoriamento de");
lcd.setCursor( 0, 1);
lcd.print(" fluxo de Agua ");
delay(3000);
lcd.clear();

pinMode(2, INPUT);
attachInterrupt(0, incpulso, RISING); //Configura o pino 2(Interrupção 0) interrupção
}

void loop () {
contaPulso = 0;//Zera a variável
sei(); //Habilita interrupção
delay (1000); //Aguarda 1 segundo
cli(); //Desabilita interrupção

vazao = contaPulso / 5.5; //Converte para L/min
media = media + vazao; //Soma a vazão para o calculo da media
i++;
lcd.setCursor(0, 0);
lcd.print(vazao); //Escreve no display o valor da vazão
lcd.print(" L/min "); //Escreve L/min
lcd.setCursor(0, 1);
lcd.print(Min);
lcd.print(":"); //Escreve :
lcd.print(i); //Escreve a contagem i (segundos)
lcd.print("Min "); //Escreve :
MiliLitros = vazao / 60;
Litros = Litros + MiliLitros;
lcd.print(Litros);
lcd.print("L ");

// Neste conjunto de linhas fizemos a média das leituras obtidas a cada 1 minuto
if (i == 60) {
Min++;
lcd.print(Min);

if (Min >= 60) {
Min = 0;
}
media = media / 60; //faz a média
Serial.print("nMedia por minuto = "); //Imprime a frase Media por minuto =
Serial.print(media); //Imprime o valor da media
Serial.println(" L/min - "); //Imprime L/min
media = 0; //Zera a variável media para uma nova contagem
i = 0; //Zera a variável i para uma nova contagem
}
}

void incpulso () {
contaPulso++; //Incrementa a variável de pulsos
}

a onde a montagem do circuito é a seguinte

[Felipe_Carvalho]

não precisa do LCD, só preciso com que as informações do sensor de fluxo consiga passar a quantidade de litros para o aplicativo

O sensor usado foi o [Sensor de Fluxo de Água G 1/2 1-30 l/min]

E o site usado como base foi o https://www.usinainfo.com.br/blog/sensor-de-fluxo-de-agua-para-arduino-1-30-lmin/

[Felipe_Carvalho]

Por enquanto eu fiz esse aplicativo:

Porem o dados não estão sendo mostrados corretamente

Você teria outra solução ou alteração no meu trabalho?

[Juan_Antonio]

31.- Automatic connection and disconnection cycle of Bluetooth.

p9A01_bluetooth_conec_desco.aia (3.2 KB)

• Arduino creates random numbers from 0 to 500 continuously and sends them over Bluetooth with a delay of 100 ms.

// Juan A. Villalpando
// http://kio4.com/appinventor/9A01_Bluetooth_Conec_Desco.htm

int value_pot0;

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

void loop() {
// value_pot0 = analogRead(A0);
value_pot0 = (int) random(0,500);
Serial.println(value_pot0);
delay(100); // It should be slower than the Clock Interval.
}

• App connects Bluetooth for 5 seconds, during that time it receives data. Disconnect. Stay disconnected for 5 seconds. Repeat the cycle.
  (approximate times).

Clock1.TimerInterval: 5000
Clock2.TimerInterval: 50
BluetoothClient1.DelimiterByte: 10

• "for each" loop, create a small delay.

[Juan_Antonio]

32.- Two Bluetooths alternately connect and disconnect cyclically.

p9A01_bluetooth_conec_desco_2.aia (3.4 KB)

In these tutorials we saw how to connect two Bluetooth devices at the same time to the same application, for this we use two components, BluetoothClient1 and BluetoothClient2.

https://groups.google.com/g/mitappinventortest/c/tsUYqkXNZ3U/m/__y8bPk3BwAJ

http://kio4.com/appinventor/9X_bluetooth_dos_arduino.htm

• Now we are going to connect two Bluetooth to the same application but cyclically, that is, the app connects to a Bluetooth, for 5 seconds during this time it receives random numbers from 100 to 199. It disconnects. It connects to the other Bluetooth for 5 seconds, during that time it receives random numbers from 2000 to 2999. It disconnects. This sequence repeats continuously.

• We will use a single BluetoothClient1.

• The two Bluetooth are sending numbers continuously. Look at the Arduino codes. Just change the range of the random numbers.

Code for Arduino 1. (100...199)

// Juan A. Villalpando
// http://kio4.com/appinventor/9A01_Bluetoot_Conec_Desco.htm

int value_pot0;

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

void loop() {
// value_pot0 = analogRead(A0);
value_pot0 = (int) random(100,199);
Serial.println(value_pot0);
delay(100); // It should be slower than the Clock Interval.
}

Code for Arduino 2. (2000...2999)

// Juan A. Villalpando
// http://kio4.com/appinventor/9A01_Bluetoot_Conec_Desco.htm

int value_pot0;

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

void loop() {
// value_pot0 = analogRead(A0);
value_pot0 = (int) random(2000,2999);
Serial.println(value_pot0);
delay(100); // It should be slower than the Clock Interval.
}

Clock1.TimerInterval: 5000
Clock2.TimerInterval: 50
BluetoothClient1.DelimiterByte: 10

[Juan_Antonio]

33.- Two Screens. Screen1 to Connect. Screen2 to view data.

p9A02_bluetooth_dospantallas.aia (5.5 KB)

For the app to work it must be installed.

• We can go from one screen to another without losing the connection.

// Juan A. Villalpando
// http://kio4.com/appinventor/9A02_Bluetooth_Dos_pantallas.htm

#include <SoftwareSerial.h>
SoftwareSerial BT(2,3);

int number = 0;
String numberS = "0";
char caracter = '0';

void setup(){
 BT.begin(9600);
 Serial.begin(9600);
}
 
void loop(){
  // Send number every 800 ms.
  delay(800);
  number = number + 1;
  if(number == 1000){number = 0;}
  Serial.println(number);
  numberS = (String) number + '\n';
  BT.write(numberS.c_str());

  // If receive char 'r' by BT, restart number.    
  if(BT.available()) {
    caracter = BT.read();
    Serial.println(caracter);
    if(caracter == 'r'){number = 0;}
    }
}

• Sketch sends a number by BT every 800 ms: 1 2 3 4 5 6 7 8...
• If this code receives the character 'r' by BT, the count is reset (number = 0)

ooooooooooooooooooooooooooooooooooooooooooooooooooo

• Screen1 Select and Connect BT.
• Receives the numbers by BT and store them in a comma separated string in a TinyDB, Always in the ReceiveText tag. 1,2,3,4,5,6,7,8,...
• Shows all data in Label etq_receive.
• Button "Open Screen2" open this screen.
  
  

oooooooooooooooooooooooooooooooooooooooooooooooo

• Screen2 shows in Label etq_receive all data of TinyDB, ReceiveText tag.
• TinyDB1 is the same on both screens, since they have the same NameSpace.
• Button: "Send 'r' (by Screen1)", close Screen2 and sends 'r' to Screen1.
• When Screen1 receive 'r', SendText 'r' by BT to Arduino. Arduino reset (number = 0). Return to Screen2.
  

ooooooooooooooooooooooooooooooooo
Similar to this topic: [Extension] Dynamic graph. Shift left graph. Sinusoidal wave. Bluetooth

[droid_droid]

hello super tutorial YES !!!, a question: Is it possible to transmit a csv file from the arduino / esp8266 to the mobile? if so what are the constraints?
Thanks for reading.
Happy holidays to you

[Juan_Antonio]

@droid_droid

archivo csv

ESP32. WiFi. WebServer. Upload file from App to ESP32. SdCard reader. LittleFS

2.- Upload files to the internal memory of ESP32 working as a Web Server. Now we are going to convert the ESP32 into a Web Server that will contain a web page from where we can upload files to the memory of the ESP32. This code is a modification of: http://www.iotsharing.com/2019/07/how-to-turn-esp-with-sdcard-or-spiffs-a-web-file-server.html Library ESP32WebServer: https://github.com/Pedroalbuquerque/ESP32WebServer #include <WiFiClient.h> #include <ESP32WebServer.h> #include <WiFi…

[Leonid]

Hello,
I just try to get data (voltage) from Arduino. voltage from the photo resistor.

void loop()
{
int Volt = analogRead(A0);
Serial.print(Volt);
delay(500);
}

I can't see any data in MitappInvertor

[Juan_Antonio]

Serial.print(Volt);

to

Serial.println(Volt);

if BluetClient.Is Connected...... in a ClockTimer

Clock Timerinterval : 400
BluetoothClient.DelymiterByte: 10

Take a look at the examples in this topic.

[ABG]

It would also help to set global Volt to Bluetooth.ReadText inside that if/then before announcing Volt in a Label.

[Juan_Antonio]

34.- App sends a number as text via Bluetooth and Arduino converts it to binary. Return.

p9A2_ConvertirBinario.aia (9.5 KB)

a) It converts it to binary with 8 bits.

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

void loop() {
  if (Serial.available()) {
    int num = Serial.parseInt(); // Read number received as text

    String binary = String(num, BIN); // To binary
    while (binary.length() < 8) {
      binary = "0" + binary; // Fill 0 left
    }

    Serial.println(binary); // Print binary number and return.
  }
}

oooooooooooooooooooooooooooooooooooooooooooooooooo

b) Binary Positional.
[Start in position 0]

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

void loop() {
  if (Serial.available()) {
    int num = Serial.parseInt(); // Read number received as text

    String binary = "";
    for (int i = 0; i < 48; i++) {
      if (i == num) {
        binary += "1"; // Agregar "1" en la posición correspondiente al número
      } else {
        binary += "0"; // Agregar "0" en las demás posiciones
      }
    }

    Serial.println(binary); // Print binary number and return.
  }
}

oooooooooooooooooooooooooooooooooooooooooooooooooo

c) It converts it to BCD (Binary-Coded Decimal).
[It is necessary that the input has 4 digits: 1256]

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

void loop() {
  if (Serial.available()) {
    String textReceived = Serial.readStringUntil('\n'); 

    if (textReceived.length() == 4) {
      for (int i = 0; i < 4; i++) {
        int num = textReceived.charAt(i) - '0';  // Get numeric value.
        String bcd = String(num, BIN);  // To BCD
        bcd = ("0000" + bcd).substring(bcd.length());  //  BCD with 4 bits
        Serial.print(bcd + " ");  // Print binary number and return.
      }
      Serial.println();
    }
  }
}

[Juan_Antonio]

35.- Arduino sends two random numbers with decimals, separated by commas.

pA0_Bluetooth_Arduino_envia.aia (10.7 KB)

float temperature = 0.0;
float humidity = 0.0;
String tempera_humidity;

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

void loop() {
  temperature = random(20, 40) * 5.555;
  humidity = random(50, 95) * 3.333;

  tempera_humidity = String(temperature, 3) + "," + String(humidity, 3);
  Serial.println(tempera_humidity);
  delay(1000);
}

[Juan_Antonio]

36.- Ultrasound SR04 sends distance to App by Bluetooth.

pA0_Bluetooth_Arduino_Ultrasonido.aia (3.0 KB)

Arduino Library Ultrasonic.zip:
http://kio4.com/appinventor/9A0_Resumen_Bluetooth.htm#ultrasonido

#include <Ultrasonic.h>
Ultrasonic ultrasonic(12,13); // (Trig PIN, Echo PIN)

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

void loop(){
  Serial.println(ultrasonic.Ranging(CM));
  delay(500);
}

[Feel_Dulfo]

Hello, I tried this and it's not working, when connecting to HC-05 Bluetooth module it works but on the Check Temperature button when I click it it just freeze. Any help? thanks

[Feel_Dulfo]

I already set the DelimiterByte the value 10, still not working

[Feel_Dulfo]

Not working on me

[Feel_Dulfo]

Well, now it's working, after extensive research and checking the hardware parts I used, the app was not the issue, the problem was the power supply, the wire I use was longer, then I try shorter wire, now it works, the problem was power supply shortage.