Server mode send a lot of bytes in buffer alone

[rafaelpm]

Everyone know about lack components, so I need to replace a Bluetooth NINA-B112. The behavior below occurs on the Nina W106 and ESP32-CAM (AI Thinker) modules. I started a project from example server, but editing lines like bellow:

NimBLEDevice::init("NINA-B112");
NimBLEDevice::setSecurityAuth(false,false,false);
pSerialService = pServer->createService(UUID_SERVICE_SERIAL_PORT);
pSerialCharacteristic = pSerialService->createCharacteristic(
              UUID_CHARACTERISTIC_FIFO,
              NIMBLE_PROPERTY::READ |
              NIMBLE_PROPERTY::WRITE |
              NIMBLE_PROPERTY::NOTIFY 
            );
pSerialCharacteristic->setValue("RAFAEL");
pSerialCharacteristic->notify(true);
pSerialCharacteristic->setCallbacks(&chrCallbacks);
pSerialService->start();

pAdvertising = NimBLEDevice::getAdvertising();
pAdvertising->addServiceUUID(pSerialService->getUUID());
pAdvertising->setScanResponse(true);
pAdvertising->start();

My defines are:

#define UUID_SERVICE_SERIAL_PORT "2456e1b9-26e2-8f83-e744-f34f01e9d701"
#define UUID_CHARACTERISTIC_FIFO "2456e1b9-26e2-8f83-e744-f34f01e9d703"

I used u-blox app: https://play.google.com/store/apps/details?id=com.ublox.BLE Using this android app, when connected, I receive a lot of same data like: RAFAEL. If I send data in chat tab (for example: Test), I receive a lot of "Test". My conclusion is that it sends what is in the buffer, but what started it? How control it?

[h2zero]

When you send notifications it sends the current value of the characteristic, if you're doing this in a loop it will keep sending the notification.

[rafaelpm]

Removing NIMBLE_PROPERTY::NOTIFY so don't send in a loop, however, don't send anything. How set and reset notify flag in runtime? Is need to stop and start server?

[rafaelpm]

Thanks for the reply, bug has been fixed. I wrote the below code in my loop.

if(pServer->getConnectedCount() > 0) {
  NimBLEService* pSvc = pServer->getServiceByUUID(UUID_SERVICE_SERIAL_PORT);
  if(pSvc) {      
      NimBLECharacteristic* pChr = pSvc->getCharacteristic(UUID_CHARACTERISTIC_FIFO);
      if(pChr) {          
          pChr->notify(false);        
      }
  }
}