Update MEMORY.md, MEMORY.md, bachelor-thesis-summary.md, and 76 more files

ESP32 iBeacon Code/ESP32_iBeacon/ESP32_iBeacon.ino

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+#include <BLEDevice.h>
+#include <BLEServer.h>
+#include <BLEUtils.h>
+#include <BLE2902.h>
+#include <BLEBeacon.h>
+#define DEVICE_NAME            "ESP32 iBeacon"
+#define SERVICE_UUID           "87b99b2c-9080-4d04-8f00-a5d9a3f9a0e7"
+#define BEACON_UUID            "87b99b2c-9080-4d04-8f00-a5d9a3f9a0e7"
+#define BEACON_UUID_REV        "e7a0f9a3-d9a5-008f-044d8090-2c9bb987"
+#define CHARACTERISTIC_UUID    "87b99b2c-9080-4d04-8f00-a5d9a3f9a0e7"
+BLEServer *pServer;
+BLECharacteristic *pCharacteristic;
+bool deviceConnected = false;
+uint8_t value = 0;
+
+class MyServerCallbacks: public BLEServerCallbacks {
+    void onConnect(BLEServer* pServer) {
+      deviceConnected = true;
+      Serial.println("deviceConnected = true");
+    };
+
+    void onDisconnect(BLEServer* pServer) {
+      deviceConnected = false;
+
+      Serial.println("deviceConnected = false");
+      // Restart advertising to be visible and connectable again
+      BLEAdvertising* pAdvertising;
+      pAdvertising = pServer->getAdvertising();
+      pAdvertising->start();
+      Serial.println("iBeacon advertising restarted");
+
+    }
+
+};
+
+class MyCallbacks: public BLECharacteristicCallbacks {
+    void onWrite(BLECharacteristic *pCharacteristic) {
+
+      std::string rxValue = pCharacteristic->getValue();
+      if (rxValue.length() > 0) {
+        Serial.println("*********");
+        Serial.print("Received Value: ");
+        for (int i = 0; i < rxValue.length(); i++) {
+          Serial.print(rxValue[i]);
+        }
+
+        Serial.println();
+        Serial.println("*********");
+
+      }
+
+    }
+
+};
+
+void init_service() {
+  BLEAdvertising* pAdvertising;
+  pAdvertising = pServer->getAdvertising();
+  pAdvertising->stop();
+  
+// Create the BLE Service
+  BLEService *pService = pServer->createService(BLEUUID(SERVICE_UUID));
+
+  // Create a BLE Characteristic
+  pCharacteristic = pService->createCharacteristic(
+                      CHARACTERISTIC_UUID,
+                      BLECharacteristic::PROPERTY_READ   |
+                      BLECharacteristic::PROPERTY_WRITE  |
+                      BLECharacteristic::PROPERTY_NOTIFY
+                    );
+
+  pCharacteristic->setCallbacks(new MyCallbacks());
+  pCharacteristic->addDescriptor(new BLE2902());
+  pAdvertising->addServiceUUID(BLEUUID(SERVICE_UUID));
+
+  // Start the service
+  pService->start();
+  pAdvertising->start();
+
+}
+
+void init_beacon() {
+  BLEAdvertising* pAdvertising;
+  pAdvertising = pServer->getAdvertising();
+  pAdvertising->stop();
+
+  // iBeacon
+  BLEBeacon myBeacon;
+  myBeacon.setManufacturerId(0x004C);
+  myBeacon.setMajor(1);
+  myBeacon.setMinor(3);                                             // ESP32-ID: 1 to n
+  myBeacon.setSignalPower(0xc5);
+  myBeacon.setProximityUUID(BLEUUID(BEACON_UUID_REV));
+  BLEAdvertisementData advertisementData;
+  advertisementData.setFlags(0x1A);
+  advertisementData.setManufacturerData(myBeacon.getData());
+  pAdvertising->setAdvertisementData(advertisementData);
+  pAdvertising->start();
+}
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println();
+  Serial.println("Initializing...");
+  Serial.flush();
+  BLEDevice::init(DEVICE_NAME);
+  pServer = BLEDevice::createServer();
+  pServer->setCallbacks(new MyServerCallbacks());
+  init_service();
+  init_beacon();
+  Serial.println("iBeacon + service defined and advertising!");
+}
+
+void loop() {
+  if (deviceConnected) {
+    Serial.printf("*** NOTIFY: %d ***n", value);
+    pCharacteristic->setValue(&value, 1);
+    pCharacteristic->notify();
+    value++;
+  }
+
+  delay(2000);
+
+}