unable to auto connect or manually reconnect with device

[sulabh9999]

I paired with fitness band all done, when ble device goes out of range it should reconnect but couldn't also getting failure while connectToDeivce(id) {autoConnect: true} as well, i can see Bluetooth connected symbol in fitness band but unable to get characteristic and read/write in services, getting failure.

Am i going wrong, Please suggest.

manager.connectToDevice(deviceId)
 .then(device => {
      console.log('device reconnectd..', device)
 })
.catch(e => console.warn('got error while reconnecting..'))

I tried this also

device.connect()
.then(() => {
   return device.discoverAllServicesAndCharacteristics();
})
.then(device => {
     console.log('details: ', device);
})
.catch(e => console.warn('got error while reconnecting..'))

getting response

[Sat Jan 09 2021 18:31:36.800]  LOG      device reconnectd.. {
  "_manager": {
    "_activePromises": {

    },
    "_activeSubscriptions": {
    },
    "_errorCodesToMessagesMapping": {
      "0": "Unknown error occurred. This is probably a bug! Check reason property.",
      "601": "Location services are disabled"
      .....
    },
    "_eventEmitter": {
      "_subscriber": [
        EventSubscriptionVendor
      ]
    },
    "_scanEventSubscription": null,
    "_uniqueId": 3
  },
  "id": "C0:A0:6D:AC:41:F5",
  "isConnectable": null,
  "localName": null,
  "manufacturerData": null,
  "mtu": null,
  "name": "Mi Band 3",
  "overflowServiceUUIDs": null,
  "rssi": null,
  "serviceData": null,
  "serviceUUIDs": null,
  "solicitedServiceUUIDs": null,
  "txPowerLevel": null
}
[Sat Jan 09 2021 18:31:36.838]  WARN     got error while reconnecting..

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