Question

这是场景。 Arduino A连接了按钮A。按下按钮A时，LED A点亮，LED B熄灭。再次单击时，LED A熄灭，LED B点亮。我将其与其他方面完全放在控制和工作之中。我要完成的下一步是将BLE Notify纳入arduino。当单击按钮并打开LED A时，我希望BLE通知发送一些东西（例如'G'）。然后，如果再次按下该按钮，则BLE通知将发送不同的内容（“ R”）。

我尝试将'BLE_Notify'Sketch示例结合到我的代码中，但是当我将Arduino连接到BLE电话应用程序时，我无休止地收到了无数次的更改通知。下面是我的组合代码。

#include <BLEDevice.h>
#include <BLEServer.h>
#include <BLEUtils.h>
#include <BLE2902.h>

BLEServer* pServer = NULL;
BLECharacteristic* pCharacteristic = NULL;
bool deviceConnected = false;
bool oldDeviceConnected = false;
uint32_t value = 0;

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

class MyServerCallbacks: public BLEServerCallbacks {
    void onConnect(BLEServer* pServer) {
      deviceConnected = true;
    };

    void onDisconnect(BLEServer* pServer) {
      deviceConnected = false;
    }
};

const int bt1 = 27;
boolean bt1g = true;
int bt1t = 0;

void setup() {
  pinMode(33, OUTPUT);
  pinMode(15, OUTPUT);
  pinMode(bt1, INPUT_PULLUP);
  Serial.begin(9600);

  BLEDevice::init("ESP32");
  pServer = BLEDevice::createServer();
  pServer->setCallbacks(new MyServerCallbacks());
  BLEService *pService = pServer->createService(SERVICE_UUID);

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

  pCharacteristic->addDescriptor(new BLE2902());

  pService->start();

  BLEAdvertising *pAdvertising = BLEDevice::getAdvertising();
  pAdvertising->addServiceUUID(SERVICE_UUID);
  pAdvertising->setScanResponse(false);
  pAdvertising->setMinPreferred(0x0);
  BLEDevice::startAdvertising();
  Serial.println("Waiting a client connection to notify...");
}

void loop()
{
   if (deviceConnected) {
        pCharacteristic->setValue((uint8_t*)&value, 4);
        pCharacteristic->notify();
        value++;
        delay(3); /
    }
    if (!deviceConnected && oldDeviceConnected) {
        delay(500); 
        pServer->startAdvertising(); 
        Serial.println("start advertising");
        oldDeviceConnected = deviceConnected;
    }
    if (deviceConnected && !oldDeviceConnected) {
        oldDeviceConnected = deviceConnected;
    }

  if (bt1g) {
    if (digitalRead(bt1) == LOW ) {
      bt1t = (bt1t + 1) % 2;
      Serial.println(bt1t);

      bt1g = false;
    }
  }
  if (!bt1g) {
    if (digitalRead(bt1) == HIGH) {
      bt1g = true;
    }
  }

  if (bt1t == 0) {
    digitalWrite(33, LOW);
    digitalWrite(15, HIGH);
    pCharacteristic->setValue(0);
    pCharacteristic->notify();
    value++;
  }
  if (bt1t == 1) {
    digitalWrite(33, HIGH);
    digitalWrite(15, LOW);
    pCharacteristic->setValue(1);
    pCharacteristic->notify();
    value++;
  }
  delay(50);
}

我对Arduino和C ++环境非常陌生，如果我的代码不正确，请对不起。

在Arduino上通过LED状态更改集成BLE通知

0 个答案: