BLE ESP32. Bluetooth. Send. Receive. Arduino IDE. Multitouch

Tutorials and Guides
, ,
26

13.- Multitouch. Press several buttons at the same time.

p110i_esp32_ble_Multitouch.aia (204.6 KB)

In this topic we can see an example of Multitouch with/without Clock using classic Bluetooth:

esp32_ble13
esp32_ble13946×2322 321 KB

// Juan Antonio Villalpando.
// http://kio4.com/arduino/160_Wemos_ESP32_BLE.htm

#include <BLEDevice.h>
#include <BLEUtils.h>
#include <BLEServer.h>

String valor;
byte byte_received;
byte bytes;
#define LED12  12    // LED pin 12
#define LED14  14    // LED pin 14
#define LED27  27    // LED pin 27
#define LED16  16    // LED pin 16
String estado ="";
void motores();

#define SERVICE_UUID        "4fafc201-1fb5-459e-8fcc-c5c9c331914b"
#define CHARACTERISTIC_UUID "beb5483e-36e1-4688-b7f5-ea07361b26a8"

class MyCallbacks: public BLECharacteristicCallbacks {
    void onWrite(BLECharacteristic *pCharacteristic) {
      std::string value = pCharacteristic->getValue();
      if (value.length() > 0) {
        valor = "";
        for (int i = 0; i < value.length(); i++){
          valor = valor + value[i];
        }
          byte_received = valor.charAt(0);
          Serial.print(byte_received);  
          Serial.print("    "); 
          
       /**  // print byte_received in byte, ejemplo: 00000110
            // Convert valor to bytes.
            for(int i=0; i<valor.length(); i++){
               char myChar = valor.charAt(i);
                for(int i=7; i>=0; i--){
                 bytes = bitRead(myChar,i);
                 Serial.print(bytes, BIN); // Binario
                }
                 Serial.println("");
            }
            */

motores();
pCharacteristic->setValue(estado.c_str()); // Return status
 }

    }
};

void setup() {
  pinMode(LED12, OUTPUT);
  pinMode(LED14, OUTPUT);
  pinMode(LED27, OUTPUT);
  pinMode(LED16, OUTPUT);
  Serial.begin(115200);

  BLEDevice::init("MyESP32");
  BLEServer *pServer = BLEDevice::createServer();

  BLEService *pService = pServer->createService(SERVICE_UUID);

  BLECharacteristic *pCharacteristic = pService->createCharacteristic(
                                         CHARACTERISTIC_UUID,
                                         BLECharacteristic::PROPERTY_READ |
                                         BLECharacteristic::PROPERTY_WRITE
                                       );

  pCharacteristic->setCallbacks(new MyCallbacks());
  pCharacteristic->setValue("Iniciado.");
  pService->start();

  BLEAdvertising *pAdvertising = pServer->getAdvertising();
  pAdvertising->start();
}

void loop() {
//
}

void motores(){
if (bitRead(byte_received, 0)){digitalWrite(LED12,HIGH); Serial.print("Motor0: RUN  ");}
else {digitalWrite(LED12,LOW); Serial.print("Motor0: ---  ");}
if (bitRead(byte_received, 1)){digitalWrite(LED14,HIGH); Serial.print("Motor1: RUN  ");} 
else {digitalWrite(LED14,LOW); Serial.print("Motor1: ---  ");}
if (bitRead(byte_received, 2)){digitalWrite(LED27,HIGH); Serial.print("Motor2: RUN  ");} 
else {digitalWrite(LED27,LOW); Serial.print("Motor2: ---  ");}
if (bitRead(byte_received, 3)){digitalWrite(LED16,HIGH); Serial.print("Motor3: RUN  ");} 
else {digitalWrite(LED16,LOW); Serial.print("Motor3: ---  ");} 
Serial.println();
   estado ="";
   if (digitalRead(LED12) == HIGH) {estado = "Motor0: RUN,";} else {estado = "Motor0: ---,";}
   if (digitalRead(LED14) == HIGH) {estado = estado + "Motor1: RUN,";} else {estado = estado + "Motor1: ---,";}
   if (digitalRead(LED27) == HIGH) {estado = estado + "Motor2: RUN,";} else {estado = estado + "Motor2: ---";}
   if (digitalRead(LED16) == HIGH) {estado = estado + "Motor3: RUN";} else {estado = estado + "Motor3: ---";}
}
1 Like