#include <ArduinoBLE.h>

BLEDevice nicla;
BLECharacteristic testChar;

void setup() {
  Serial.begin(115200);
  while (!Serial);

  if (!BLE.begin()) {
    Serial.println("BLE init failed");
    while (1);
  }

  Serial.println("ESP BLE scanning...");
  BLE.scan();   // 🔥 DAS HAT GEFEHLT
}

void loop() {
  BLE.poll();

  if (!nicla) {
    BLEDevice dev = BLE.available();
    if (dev) {
      Serial.print("Found device: ");
      Serial.println(dev.localName());

      if (dev.localName() == "NiclaBLETest") {
        Serial.println("Connecting to Nicla...");
        BLE.stopScan();

        if (dev.connect()) {
          Serial.println("Connected");
          dev.discoverAttributes();

          testChar = dev.characteristic(
            "87654321-4321-4321-4321-ba0987654321"
          );

          if (!testChar) {
            Serial.println("Characteristic not found");
            while (1);
          }

          testChar.subscribe();
          nicla = dev;
          Serial.println("Subscribed to notifications");
        } else {
          Serial.println("Connection failed");
          BLE.scan();
        }
      }
    }
    return;
  }

  if (!nicla.connected()) {
    Serial.println("Disconnected, restarting scan");
    nicla = BLEDevice();
    BLE.scan();
    return;
  }

  if (testChar.valueUpdated()) {
    uint8_t val;
    testChar.readValue(val);
    Serial.print("RECEIVED: 0x");
    Serial.println(val, HEX);
  }
}