peripheral.discoverAttributes() hangs when peripheral has more than one characteristics

[fredsco]

Peripheral: Nicla sense ME
Central: RP2040

Both use the ArduinoBLE library.

I wrote code for the Nicla Sense ME which creates one service and exactly one characteristic. This characteristic is added to the service. I then write a value to the characteristics. The RP2040 is then able to receive and print this value.

When I add another characteristic to the Nicla sense me, the RP2040 hangs and the LED flickers RED when it comes to "Discovering attributes".

I attached part of the code where I add characteristics on the Peripheral and do a "discoverAttributes" on the Central.

CODE:

Peripheral:
1/2

BLEService aService("0x01FF");
BLEUnsignedIntCharacteristic temperatureValChar("00000000-0000-0000-0000-00000000FF01", BLERead | BLENotify);
BLEUnsignedIntCharacteristic humidityValChar("00000000-0000-0000-0000-00000000FF02", BLERead | BLENotify);

2/2

Note: here when I remove the aService.addCharacteristic(humidityValChar); the central won't hang during discoverAttributes and everything works fine.

BLE.setAdvertisedService(aService);
aService.addCharacteristic(temperatureValChar);
aService.addCharacteristic(humidityValChar);

Central:

1/2

Serial.println("Connecting ...");
  if (peripheral.connect())
  {
    Serial.println("Connected");
  }
  else
  {
    Serial.println("Failed to connect!");
    return;
  }
  // discover peripheral attributes
  Serial.println("Discovering attributes ...");
  if (peripheral.discoverAttributes())
  {
    Serial.println("Attributes discovered");
  }
  else
  {
    Serial.println("Attribute discovery failed!");
    peripheral.disconnect();
    return;
  }

2/2

BLECharacteristic TempCharacteristic = peripheral.characteristic("00000000-0000-0000-0000-00000000FF01");
BLECharacteristic HumidCharacteristic = peripheral.characteristic("00000000-0000-0000-0000-00000000FF02");

OUTPUT:

Peripheral:

Central: