ble_beacon_broadcast.ino

M5Stack PaperDIY Complete Kit · File : ble_beacon_broadcast.ino · Language : C++ (Arduino) · Use case : Diffuser un signal Bluetooth Low Energy (BLE) pour identifier le PaperDIY comme balise.

Configures the board as a BLE server to send data or be detected by a smartphone.

ble_beacon_broadcast.ino

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

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

BLECharacteristic *pCharacteristic;
bool deviceConnected = false;

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

void setup() {
  Serial.begin(115200);
  BLEDevice::init("PaperDIY Beacon");
  BLEServer *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->setValue("Hello from PaperDIY");
  pService->start();
  BLEAdvertising *pAdvertising = pServer->getAdvertising();
  pAdvertising->start();
  Serial.println("BLE Advertising started");
}

void loop() {
  delay(1000);
  if (!deviceConnected) {
    Serial.println("Not connected");
  }
}

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