Cannot pair device

[joseph-petersen-spectrumdefensesystems]

Not a bug, but I cannot find any other information anywhere on pairing / bonding.

I have set the device as pairable but am unable to pair with anything. I understand this is very little to go off of, but I am more so wondering if there is a step I am missing, like some other method I need to call when bonding? Otherwise I can provide more code.

[fpistm]

Could you be more precise? Setup? Configuration? ....

[joseph-petersen-spectrumdefensesystems]

Sure, here is my code:

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I am able to connect when I use the nRF Connect and ST BLE Toolbox Apps, but when I attempt to bond / pair with them it fails and the connection is broken.

[fpistm]

Could you share the code as text and tell me the hardware you used. If it is a WB, the firmware version.

[joseph-petersen-spectrumdefensesystems]

Main Code:

#include <Arduino.h>
#include <SWOStream.h>
#include "debug_stream.h"
#include "BLE_Manager.h"
#include "initialization.h"

// Instantiate SWOStream for debugging
SWOStream SWO(2000000, SWO_Async, 0, true);

void setup() {
  SystemClock_Config();
  SWO.println("SWO Debugging Initialized!");

  if (!bleManager.beginBLE()) {
    while (1);  // Halt
  }

  SWO.println("✅ BLE service created");

  // Start advertising the service
  bleManager.startAdvertising();
}

void loop() {
  BLE.poll(); // Required for BLE event handling
  
  if (BLE.connected()) {
      if (BLE.pairable()) {
        SWO.print("Device is pairable");
      }
      else {
        SWO.print("Device is NOT pairable");
      }
      SWO.println("----------------------------------");
      if(BLE.paired()) {
        SWO.print("Device is paired");
      }
      else {
        SWO.print("Device is NOT paired");
      }
      SWO.println("");
  }
  delay(3000);
}

Manager class code:

#include "BLE_Manager.h"

BLEManager bleManager;  // Global instance
BLEService txvrService("180C");  // 16-bit service UUID (standard "User Data")

bool BLEManager::beginBLE(const char* deviceName, const char* serviceUUID, uint16_t appearance) {
  // Start the BLE module
  if (!BLE.begin()) {
    SWO.println("BLE initialization failed!");
    return false;
  }

  SWO.println("BLE initialized");

  BLE.setPairable(YES);
  BLE.setConnectable(true);

  // Basic configurations
  BLE.setLocalName(deviceName);
  BLE.setDeviceName(deviceName);
  BLE.setAppearance(appearance);
  SWO.print("Device name set: ");
  SWO.println(deviceName);

  // Create the service and add characteristics
  addAllCharacteristicsToService(txvrService);
  BLE.setAdvertisedService(txvrService); // ✅ This tells the scanner what to look for

  // Now add the service to the BLE stack
  BLE.addService(txvrService);  // ✅ Add service only after characteristics are set

  SWO.print("Service UUID registered: ");
  SWO.println(serviceUUID);

  return true;
}

void BLEManager::startAdvertising(const char* deviceName) {
  BLEAdvertisingData advData;

  advData.setFlags(BLEFlagsGeneralDiscoverable | BLEFlagsBREDRNotSupported);  // ✅ Mandatory
  advData.setLocalName(deviceName);                                           // ✅ Include in primary advData
  advData.setAdvertisedService(txvrService);                                  // ✅ Include service UUID directly

  BLE.setAdvertisingData(advData);  // Set core advertising packet

  BLEAdvertisingData scanData;
  static const uint8_t manufactData[4] = {0x01, 0x02, 0x03, 0x04};
  scanData.setManufacturerData(0xFFFF, manufactData, sizeof(manufactData));   // Optional
  BLE.setScanResponseData(scanData);

  BLE.setAdvertisingInterval(160);
  BLE.advertise();
}

I used the stm32wb55rg, FUS v1.2.0 with stm32wb5x_BLE_HCILayer_fw.bin version 1.23.0

[joseph-petersen-spectrumdefensesystems]

stm32_ble_test.zip

I have attached the entire program too if that helps.

[fpistm]

The current version of the library is aligned with Cube Fw 1.22. 1.23 is not yet released.
Did you try with stm32wb5x_BLE_HCILayer_fw.bin version 1.22.0?

[fpistm]

Ok looking at your request, it is not supported yet by the stm32duino Library.
We align the library with the Arduino Library and in this one the pair/bond is not well supported.
Sorry, but while the official library does not support it properly this one too.

Note: that's why the example EncryptedBatteryMonitor.ino is not provided