https://m.blog.naver.com/top60331/222055739354
인터럽트를 적용하는 방법을 참조할 수 있다.
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/* Video: https://www.youtube.com/watch?v=oCMOYS71NIU Based on Neil Kolban example for IDF: https://github.com/nkolban/esp32-snippets/blob/master/cpp_utils/tests/BLE%20Tests/SampleNotify.cpp Ported to Arduino ESP32 by Evandro Copercini Create a BLE server that, once we receive a connection, will send periodic notifications. The service advertises itself as: 4fafc201-1fb5-459e-8fcc-c5c9c331914b And has a characteristic of: beb5483e-36e1-4688-b7f5-ea07361b26a8 The design of creating the BLE server is: 1. Create a BLE Server 2. Create a BLE Service 3. Create a BLE Characteristic on the Service 4. Create a BLE Descriptor on the characteristic 5. Start the service. 6. Start advertising. A connect hander associated with the server starts a background task that performs notification every couple of seconds. */ #include <BLEDevice.h> #include <BLEServer.h> #include <BLEUtils.h> #include <BLE2902.h> BLEServer *pServer = NULL; BLECharacteristic *pCharacteristic = NULL; bool deviceConnected = false; bool oldDeviceConnected = false; uint8_t value = 0; // See the following for generating UUIDs: // https://www.uuidgenerator.net/ #define SERVICE_UUID "0000180D-0000-1000-8000-00805F9B34FB" #define CHARACTERISTIC_UUID "00002A37-0000-1000-8000-00805F9B34FB" class MyServerCallbacks : public BLEServerCallbacks { void onConnect(BLEServer *pServer) { deviceConnected = true; }; void onDisconnect(BLEServer *pServer) { deviceConnected = false; } }; struct Button { const uint8_t PIN; uint8_t numberKeyPresses; bool pressed; }; Button button1 = {0, 0, false}; void IRAM_ATTR isr() { button1.numberKeyPresses += 1; button1.pressed = true; } void setup() { Serial.begin(115200); pinMode(button1.PIN, INPUT_PULLUP); attachInterrupt(button1.PIN, isr, FALLING); // Create the BLE Device BLEDevice::init("MyESP32"); // Create the BLE Server pServer = BLEDevice::createServer(); pServer->setCallbacks(new MyServerCallbacks()); // Create the BLE Service BLEService *pService = pServer->createService(SERVICE_UUID); // Create a BLE Characteristic pCharacteristic = pService->createCharacteristic( CHARACTERISTIC_UUID, BLECharacteristic::PROPERTY_NOTIFY); // https://www.bluetooth.com/specifications/gatt/viewer?attributeXmlFile=org.bluetooth.descriptor.gatt.client_characteristic_configuration.xml // Create a BLE Descriptor pCharacteristic->addDescriptor(new BLE2902()); // Start the service pService->start(); // Start advertising pServer->getAdvertising() ->start(); BLEAdvertising *pAdvertising = pServer->getAdvertising(); // cjh pAdvertising->addServiceUUID(SERVICE_UUID); // cjh Serial.println("Waiting a client connection to notify..."); } void loop() { uint8_t HeartBeat[] = {0, button1.numberKeyPresses, 0, 0, 0}; // notify changed value if (button1.pressed && deviceConnected) { button1.pressed = false; pCharacteristic->setValue(HeartBeat, sizeof(HeartBeat)); pCharacteristic->notify(); value++; delay(10); // bluetooth stack will go into congestion, if too many packets are sent } // disconnecting if (!deviceConnected && oldDeviceConnected) { delay(500); // give the bluetooth stack the chance to get things ready pServer->startAdvertising(); // restart advertising Serial.println("start advertising"); oldDeviceConnected = deviceConnected; } // connecting if (deviceConnected && !oldDeviceConnected) { // do stuff here on connecting oldDeviceConnected = deviceConnected; } } |