我正在使用iOS BLE应用为手机充电。我做了一切纠正以发现特征。首先扫描外围设备并连接到它。发现具有通知和写入但没有响应属性的服务(FFB0)和特征(FFB1，FFB2)。
我找到了客户端特征配置描述符。我想将命令发送到PCB以解锁以进行充电我想向FFB2特性写入值，但外设没有响应。这是我的代码。
我已经搜索了与此相关的所有内容，但未找到任何解决方案。如果有人对此问题提供了解决方案，它将对我有所帮助。
这是客户提供的文档:
每个PCB上都有一个BLE4.0蓝牙模块，每个蓝牙模块都有一个12字节长的地址代码，PCB数据通道，服务UUID为OxFFBO，包括两个特征值，分别为OxFFBI和OxFFB2，通信长度数据为1--20字节。
OxFFB1是APP数据下载的通道，OxFBB2是Bluetooth上载数据的通道。
开机进入空闲模式，在空闲模式下，两个指示灯将闪烁，它将向手机发送一个ID码(一个字节)，手机中的APP将获取一个ID码(一个字节)。
可以通过电话设置来设置ID码。这意味着通过ID码发送相应的解锁指令。
解锁指令为0x55,0xe1，(ID0 + 1)，time，以下为解锁指令的说明:
ID0是一个ID码，“时间”是用户解锁时间(5-120分钟)，
请注意，它是二进制到十六进制的转换，
time == 05表示5分钟，
时间== 6表示6分钟，
时间== A表示10分钟，依此类推。
如果PCB的ID0为0xff，
解锁pcb 60分钟是:0x55,0xe1,0x00,0x3c;
如果PCB的ID0为0x05，
解锁pcb 10分钟是:0x55、0xe1、0x06、0x0a
当PCB上的MCU收到解锁指令时，它将开始打开输出并计时。
计时时间到后，系统再次进入空闲模式。
在空闲模式下，长按此键可进入关机睡眠时间模式。
uart的波特率设置为9,600。
APP发送到MCU的查询命令为0x55 0x01
MCU应该回复APP的信息格式:0x55、0x02，bat_level，xH，XL(xH XL代表电池的当前电压值，
xH-代表高8位，而XL ---代表低8位)
import CoreBluetooth
let batteryServiceCBUUID = CBUUID(string: "FFB0")
let batteryServiceRequestCBUUID = CBUUID(string: "FFB1")
let batteryServiceRequestCBUUID2 = CBUUID(string: "FFB2")
class ChargingViewController: UIViewController , CBPeripheralDelegate
,CBCentralManagerDelegate {
override func viewDidLoad() {
super.viewDidLoad()
centralManager = CBCentralManager(delegate: self, queue: nil, options: nil)
}
func centralManagerDidUpdateState(_ central: CBCentralManager) {
switch central.state {
case .unknown:
print("central.state is .unknown")
case .resetting:
print("central.state is .resetting")
case .unsupported:
print("central.state is .unsupported")
case .unauthorised:
print("central.state is .unauthorised")
case .poweredOff:
print("central.state is .poweredOff")
case .poweredOn:
centralManager.scanForPeripherals(withServices: [batteryServiceCBUUID])
print("central.state is .poweredOn")
@unknown default:
fatalError()
}
print("state: \(central.state)")
}
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral,
advertisementData: [String : Any], rssi RSSI: NSNumber) {
print(peripheral)
batteryServicePeripheral = peripheral
batteryServicePeripheral.delegate = self
centralManager.stopScan()
centralManager.connect(batteryServicePeripheral)
}
func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
print("Connected=======>\(String(describing: batteryServicePeripheral))")
batteryServicePeripheral.delegate = self
batteryServicePeripheral.discoverServices([batteryServiceCBUUID])
}
func centralManager(_ central: CBCentralManager, didFailToConnect peripheral: CBPeripheral,
error: Error?) {
print("Fail To Connect=======>\(String(describing: error))")
}
func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral:
CBPeripheral, error: Error?) {
if error == nil {
print("Disconnected========>\(peripheral)")
}else {
print("Disconnected========>\(String(describing: error))")
}
}
// MARK: - CBPeripheral Delegate Methods
func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
guard let services = peripheral.services else { return }
for service in services {
print("SPAKA:PERIPHERALSERVICES============>\(service)")
peripheral.discoverCharacteristics(nil, for: service)
}
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
if let characteristics = service.characteristics {
//else { return }
for characteristic in characteristics {
print(characteristic)
if characteristic.uuid == batteryServiceCBUUID {
peripheral.setNotifyValue(true, for: characteristic)
}
if characteristic.uuid == batteryServiceRequestCBUUID2 {
batteryCharacteristics = characteristic
let str1 = "55e100"
let data = String(format: "%@%@",str1,hexTimeForChar)
guard let valueString = data.data(using: String.Encoding.utf8) else
{return}
peripheral.writeValue(valueString, for: characteristic , type:
CBCharacteristicWriteType.withoutResponse)
print("Value String===>\(valueString.debugDescription)")
peripheral.setNotifyValue(true, for: characteristic)
}
}
}
peripheral.discoverDescriptors(for: batteryCharacteristics)
}
func peripheral(_ peripheral: CBPeripheral, didWriteValueFor characteristic: CBCharacteristic, error: Error?) {
if error == nil {
print("Message sent=======>\(String(describing: characteristic.value))")
}else{
print("Message Not sent=======>\(String(describing: error))")
}
}
func peripheral(_ peripheral: CBPeripheral, didUpdateNotificationStateFor characteristic:
CBCharacteristic, error: Error?) {
if error == nil {
print("SPAKA : IS NOTIFYING UPDATED STATE ======>\(characteristic.isNotifying)")
print("SPAKA : UPDATED DESCRIPTION ======>\(String(describing:
characteristic.description))")
}else{
print("SPAKA : ERRORUPDATEDNOTIFICATION\(String(describing: error))")
}
}
func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
print("SPAKA: UPDATED VALUE RECEIVED========>\(String(describing: characteristic.value))")
print("characteristic UUID: \(characteristic.uuid), value: \(characteristic.value)")
guard let str = characteristic.value else { return }
if let string = String(bytes: str, encoding: .utf8) {
print("SPAKA==========>:::\(string)")
} else {
print("not a valid UTF-8 sequence")
}
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverDescriptorsFor characteristic: CBCharacteristic, error: Error?) {
guard let desc = batteryCharacteristics.descriptors else { return }
for des in desc {
print("BEGIN:SPAKA DESCRIPTOR========>\(des)")
discoveredDescriptor = des
print("Descriptor Present Value and uuid: \(des.uuid), value: \(String(describing: des.value))")
peripheral.readValue(for: discoveredDescriptor)
}
}
func peripheral(_ peripheral: CBPeripheral, didWriteValueFor descriptor: CBDescriptor, error: Error?) {
if let error = error {
print("Failed… error: \(error)")
return
}
print("Descriptor Write Value uuid: \(descriptor.uuid), value: \(String(describing: descriptor.value))")
}
func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor descriptor: CBDescriptor, error: Error?) {
if let error = error {
print("Failed… error: \(error)")
return
}
print("Descriptor Updated Value uuid: \(descriptor.uuid), value: \(String(describing: descriptor.value))")
}
}
最佳答案
有关PDB的信息有些难以破解，但包含的信息也不错。听起来好像PCB包含蓝牙至UART模块。一种特性是用于将数据发送到PCB，一种特性是用于从PCB接收数据。
我仍然不明白需要发送到PCB的命令。如果您有权访问Android代码，则可以在此处找到答案。
以下是可能的最小代码:
let batteryServiceUUID = CBUUID(string: "FFB0")
let rxCharacteristicUUID = CBUUID(string: "FFB1")
let txCharacteristicUUID = CBUUID(string: "FFB2")
var centralManager: CBCentralManager!
var batteryPeripheral: CBPeripheral? = nil
var batteryService: CBService? = nil
var txCharacteristic: CBCharacteristic? = nil
var rxCharacteristic: CBCharacteristic? = nil
func centralManagerDidUpdateState(_ central: CBCentralManager) {
if central.state == .poweredOn {
centralManager.scanForPeripherals(withServices: [batteryServiceUUID])
}
}
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
batteryPeripheral = peripheral
batteryPeripheral!.delegate = self
centralManager.stopScan()
centralManager.connect(batteryPeripheral!)
}
func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
batteryPeripheral!.discoverServices([batteryServiceUUID])
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
peripheral.discoverCharacteristics(nil, for: peripheral.services![0])
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
for characteristic in service.characteristics! {
if characteristic.uuid == rxCharacteristicUUID {
rxCharacteristic = characteristic
peripheral.setNotifyValue(true, for: rxCharacteristic!)
} else if (characteristic.uuid == txCharacteristicUUID) {
txCharacteristic = characteristic
}
}
sendInitialCommand()
}
func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
if let value = characteristic.value {
print("Data received")
print(value as NSData)
}
}
func sendInitialCommand() {
let cmdBytes: [UInt8] = [0x55, 0xe1, 0x00, 0x0a]
let cmd = Data(cmdBytes)
batteryPeripheral!.writeValue(cmd, for: txCharacteristic!, type: .withoutResponse)
}