how to update BLE device name in ios swift !

RE: how to update BLE device name in ios swift !

Vijyendra — Thu, 03 Aug 2017 08:49:07 GMT

Thanks All,

Successfully updated device name, aplha value and date on ble device...just was missing sequence :(

Below is the code: for future reference

@IBAction func updateDevicePressed(){

    self.showActivityView()
    self.updateButton.isEnabled = false
    
    DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
        self.updateRegistrationNumber()
    }
}

func updateRegistrationNumber(){
    
    let hexValReg = deviceName.unicodeScalars.filter { $0.isASCII }.map { String(format: "%X", $0.value) }.joined()
    print(hexValReg)
    let regData = self.dataWithHexString(hex: hexValReg)// 50756E65 pune
    
    deviceNameCharacterToUpdate?.service.peripheral.writeValue(regData as Data, for: deviceNameCharacterToUpdate!, type: CBCharacteristicWriteType.withResponse)
    
    DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
        self.updateLocation()
    } 
}

func updateLocation(){
    
    let hex = location.unicodeScalars.filter { $0.isASCII }.map { String(format: "%X", $0.value) }.joined()
    let dataLoca = self.dataWithHexString(hex: hex)

    locationCharacterToUpdate?.service.peripheral.writeValue(dataLoca as Data, for: locationCharacterToUpdate!, type: CBCharacteristicWriteType.withResponse)
  
    DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
        self.updateExpireDate()
    }
}

func updateExpireDate(){
    
    let data = self.dataWithHexString(hex: hexDateToWrite)// 5976C3A3
    dateCharacterToUpdate?.service.peripheral.writeValue(data, for: dateCharacterToUpdate!, type: CBCharacteristicWriteType.withResponse)

          self.updateButton.isEnabled = true
          self.hideActivityView()

}

RE: how to update BLE device name in ios swift !

run_ar — Thu, 03 Aug 2017 07:42:29 GMT

If you are trying to update the Bluetooth low energy Generic Access Profile (GAP) device name. This property declaration is var name: String? { get } I'm not to familiar with swift, but since it says get, I assume you cannot set it. Also for objective C this is read only. So you need to create a characteristic on the peripheral and use this to update the name. On Android I belive you can write to the GAP device name directly.

RE: how to update BLE device name in ios swift !

Roger Clark — Sun, 30 Jul 2017 22:30:37 GMT

@RK

Yes. Its a terrible question.

RE: how to update BLE device name in ios swift !

RK — Sun, 30 Jul 2017 11:00:31 GMT

not really - he's asking about swift syntax to do something. This isn't a swift support forum. If he was asking about what characteristic one might write to to change the name then it would be a slightly more relevant question which could be answered.

or put another way ... it's not a terribly good question which leaves far too much unspecified like ... for instance ... what 'characteristic' is.

RE: how to update BLE device name in ios swift !

Roger Clark — Sun, 30 Jul 2017 10:28:33 GMT

@Rk This presumes that the target BLE device has a Write Characteristic which can be used to change the advertising name.

RE: how to update BLE device name in ios swift !

RK — Sun, 30 Jul 2017 02:36:49 GMT

I think you'd be better off asking that in an Apple bluetooth or swift forum.