btle | 易学教程

GATT profile and UART service

阅读更多关于 GATT profile and UART service

问题 I am new to developing a mobile app with bluetooth connection to peripheral device. I searched that GATT is the relevant profile used for bluetoothLE communication but our client recommended that we use UART service. Now I am confused as to 1. how these two things are related and 2. Do we have to opt for one of these, if so, what are the pros and cons of each. Thanks 回答1: Legacy Bluetooth provides the serial port profile (SPP) - This is essentially a serial input/output stream over Bluetooth.

GATT profile and UART service

阅读更多关于 GATT profile and UART service

iOS8 and BTLE | CBCentralManager unable to find peripherals

阅读更多关于 iOS8 and BTLE | CBCentralManager unable to find peripherals

问题 I have an iOS app that is connecting to a device (arduino) using a BTLE. Everything is working fine on my iPad iOS 7. After upgrading to iOS 8, the CBCentralManager is not finding any peripherals. - (void)startScanningForSupportedUUIDs { [self.centralManager scanForPeripheralsWithServices:nil options:nil]; } I don't know what can be the problem. 回答1: I have the solution, for some reason in iOS 8 there is some delay after instantiate your CBManager. You need to start to scan when the

Characteristic.value from Bluetooth reading in Swift

阅读更多关于 Characteristic.value from Bluetooth reading in Swift

I'm trying to read and convert into String a reading from a BT device. <CBCharacteristic: 0x1700a2e80, UUID = 2A9D, properties = 0x20, value = <02ac08e1 07010a14 0029>, notifying = YES> Based on example I found online I did let u16 = (characteristic.value! as NSData).bytes.bindMemory(to: Int.self, capacity: characteristic.value!.count).pointee but my u16 is null, even though characteristic.value contains (lldb) dp characteristic.value! as NSData <02ac08e1 07010a14 0029> Can anyone point me in the right direction? It's not super easy. Weight Measurement You may need to write something like this

Characteristic.value from Bluetooth reading in Swift

阅读更多关于 Characteristic.value from Bluetooth reading in Swift

问题 I'm trying to read and convert into String a reading from a BT device. <CBCharacteristic: 0x1700a2e80, UUID = 2A9D, properties = 0x20, value = <02ac08e1 07010a14 0029>, notifying = YES> Based on example I found online I did let u16 = (characteristic.value! as NSData).bytes.bindMemory(to: Int.self, capacity: characteristic.value!.count).pointee but my u16 is null, even though characteristic.value contains (lldb) dp characteristic.value! as NSData <02ac08e1 07010a14 0029> Can anyone point me in

Does CBCentralManager connect ever time out?

阅读更多关于 Does CBCentralManager connect ever time out?

问题 I know the answer is nominally "no", but I mean really —what if the app goes into the background (with BTLE background processing enabled)? For 24 hours? Across an app update? Under the heading "Reconnecting to Peripherals", this Apple documentation describes a reconnection workflow that first tries to reconnect to previously paired peripherals found via retrievePeripheralsWithIdentifiers: but then starts scanning again if you fail to connect. How do you know when to give up on connect -ing

iOS8 and BTLE | CBCentralManager unable to find peripherals

阅读更多关于 iOS8 and BTLE | CBCentralManager unable to find peripherals

I have an iOS app that is connecting to a device (arduino) using a BTLE. Everything is working fine on my iPad iOS 7. After upgrading to iOS 8, the CBCentralManager is not finding any peripherals. - (void)startScanningForSupportedUUIDs { [self.centralManager scanForPeripheralsWithServices:nil options:nil]; } I don't know what can be the problem. I have the solution, for some reason in iOS 8 there is some delay after instantiate your CBManager. You need to start to scan when the CBCentralManager is on, in this method: -(void)centralManagerDidUpdateState:(CBCentralManager *)central{ switch

How to get data out of bluetooth characteristic in Swift

阅读更多关于 How to get data out of bluetooth characteristic in Swift

问题 I've got a Polar h7 device around me right now (it's BTLE) and I've got everything working but I am confused about how to get the BPM our of the characteristic.value now that it is updating. I have to turn some bytes into bpm... My peripheral is updating: func peripheral(peripheral: CBPeripheral!, didUpdateValueForCharacteristic characteristic: CBCharacteristic!, error: NSError!) { if characteristic.UUID == CBUUID.UUIDWithString(heartRateChar) { getInfoAboutHeartRate(characteristic) } } I am

How to get data out of bluetooth characteristic in Swift

阅读更多关于 How to get data out of bluetooth characteristic in Swift

I've got a Polar h7 device around me right now (it's BTLE) and I've got everything working but I am confused about how to get the BPM our of the characteristic.value now that it is updating. I have to turn some bytes into bpm... My peripheral is updating: func peripheral(peripheral: CBPeripheral!, didUpdateValueForCharacteristic characteristic: CBCharacteristic!, error: NSError!) { if characteristic.UUID == CBUUID.UUIDWithString(heartRateChar) { getInfoAboutHeartRate(characteristic) } } I am getting info about the heart rate: func getInfoAboutHeartRate(characteristic:CBCharacteristic) {

How to get Mac Address From CBPeripheral And CBCenter

阅读更多关于 How to get Mac Address From CBPeripheral And CBCenter

I need to take target mac address from input connection and outgoing connection from CBPeripheral And CBCenter. identifier dose not define in them. look was remove from iOS 7. Is there any other way? https://developer.apple.com/library/prerelease/ios/documentation/CoreBluetooth/Reference/CBPeripheral_Class/index.html You can't get the MAC address for a CBPeripheral but you can get the identifier property, which is a UUID that iOS computes from the MAC amongst other information. This value can be safely stored and used to identify the same peripheral in the future on this particular iOS device.