Found issue in Discovering the characteristics - Version 1.1.0 and above

Using BLE-PLX Library for Scanning and Connecting to BLE devices

Did check your reference implementation as provided at - https://www.polidea.com/blog/ReactNative_and_Bluetooth_to_An_Other_level/

used the below code block to discover all services -

 device
          .connect()
          .then(device => {
            this.info('Discovering services and characteristics');
            return device.discoverAllServicesAndCharacteristics();
          })
          .then(device => {
            this.info('Setting notifications');
            return this.setupNotifications(device);
          })

The issue i found, is the device has no service UUIDs list even when the libraries like

react-native-ble-manager as successfully scanning and discovering services and characteristics

Attaching the screenshot of device properties - after scanning and discovering services -

Kindly resolve the above issue as i am using your library in one of my project as initially i found it more better and easy to use. Kindly fix the bug as soon as possible, will be helpful.

[Cierpliwy]

Ok. Let me clarify. Device has multiple properties:

▸ id
▸ name
▸ rssi
▸ mtu
▸ manufacturerData
▸ serviceData
▸ serviceUUIDs
▸ localName
▸ txPowerLevel
▸ solicitedServiceUUIDs
▸ isConnectable
▸ overflowServiceUUIDs

We can group them into explicit categories: Read-only (stable) values:

▸ id

Properties, which can be modified, when the new Device object is fetched from the API (Device by itself is immutable and “snapshot” of it at the moment of the call):

▸ name
▸ mtu

Properties, which are fetched during the scanning procedure from the advertisement data (they are always null outside device scanning):

▸ rssi
▸ manufacturerData
▸ serviceData
▸ serviceUUIDs
▸ localName
▸ txPowerLevel
▸ solicitedServiceUUIDs
▸ isConnectable
▸ overflowServiceUUIDs

Therefore if you want to get services of the device (not services advertised during scanning procedure) you have to call sequentially device.iscoverAllServicesAndCharacteristics() and then device.services(). The result of the last call should return Array<Service>. I guess that’s what you expect.

Why all of the properties are in one bag? That’s just a mistake during early development, which we left as it is to keep backward compatibility (it’s so important for me in this crazy JS world).

[Ajaykumar02]

@Cierpliwy, cool i have not used the device.services(). Thank you for clarification.