Trying to communicate to with a password protected Ble Device

Hi,

Which firmware version do you have on the Bangle? This may actually be unrelated to pairing.

On 2v09 I added increased MTUs, but those require some negotiating and we found that when both devices support larger MTUs you actually needed a delay to let them finish.

I think Cutting Edge firmwares have this fixed, but maybe the code below will work for you? It just adds a setTimeout

scan = ()=>{
  NRF.findDevices(devices => {
    for (let device of devices) {
      // Only display devices that advertise a name
        if (device.name) {
          addMenuItem(device);
        }
    }
  }, {timeout:3000,active: true });
};

addMenuItem = (device)=>{
  console.log(device);

  //first attemp of sending the password
  /*device.on('passkeyRequest', function() {
    console.log("passKeyRequested");
    device.sendPasskey("012034");
  });
  */
  //adding a item to the menu, trying to connect when item is pressed
  scanMenu[device.name]= ()=>{
    console.log(device); // is displayed the device
    NRF.connect(device.id)
      .then((g)=>{
        console.log("NRF connection ok!");//is displayed
        var gatt = g;
        console.log(gatt);
        var device = g.device;
        //Second attempt of sending password
        device.on('passkeyRequest', function() {
          console.log("passKeyRequested");
          device.sendPasskey("012034");
        });

      gatt.startBonding()
      .then(()=>{
        console.log("bonded", gatt.getSecurityStatus()); //displays : bonded { "connected": true, "encrypted": false, "mitm_protected": false, "bonded": true }
        return new Promise(resolve => setTimeout(resolve, 1000)); // wait 1 sec
     }).then(() => {
        return gatt.getPrimaryService("00000000-3608-4bee-bb82-4d09b486bc1f"); //also tried getPrimaryServices()
    //console.log(services);
      })
      .then( (services)=>{
        console.log(services); //
        return services.getCharacteristics();
      })
      .then((chars)=>{
        console.log(chars);
      })
    })
    .catch((error)=>{
      console.log(error);
    });
  };