我正在构建一个连接到BLE device (Redbear Labs Duo)的iOS Swift应用。
什么有用?
问题出在哪里?
我执行上述步骤的代码如下:
func scanWifi() {
print("[DEBUG] - Scanning for Wifi")
let command:[UInt8] = [0x02, 0xA0]
let commandData = NSData(bytes: command, length: command.count)
BLE.sharedInstance.write(toCharacteristic: BLE.sharedInstance.RBL_CHAR_CMD_UUID, data: commandData, withType: .withResponse)
let state:[UInt8] = [0xB1]
let stateData = NSData(bytes: state, length: state.count)
BLE.sharedInstance.write(toCharacteristic: BLE.sharedInstance.RBL_CHAR_SCN_UUID, data: stateData, withType: .withResponse)
BLE.sharedInstance.read(fromCharacteristic: BLE.sharedInstance.RBL_CHAR_SCN_UUID)
}
一切正常......但......在将上述数据写入外围设备之后我期待以下方法被调用 - 它从来没有......我做错了什么?
func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
if error != nil {
print("[ERROR] Error updating value. \(error!.localizedDescription)")
return
}
if characteristic.uuid.uuidString == RBL_CHAR_CMD_UUID {
self.delegate?.bleDidReceiveData(data: characteristic.value as NSData?)
}
}
更新
我设置了一堆调试语句并获得了以下输出 - 从下面可以看出
[DEBUG]连接到外围设备:547BC3C9-4823-431C-B888-A8F3E8C699F5
[DEBUG]连接到外围设备547BC3C9-4823-431C-B888-A8F3E8C699F5
[DEBUG]连接到外围设备了 [DEBUG]发现服务:3EC61400-89CD-49C3-A0D9-7A85669E901E用于外围设备:547BC3C9-4823-431C-B888-A8F3E8C699F5
[DEBUG]发现特性:3EC61401-89CD-49C3-A0D9-7A85669E901E用于外围设备:547BC3C9-4823-431C-B888-A8F3E8C699F5
[DEBUG]发现特性:3EC61402-89CD-49C3-A0D9-7A85669E901E用于外围设备:547BC3C9-4823-431C-B888-A8F3E8C699F5
(" 3EC61402-89CD-49C3-A0D9-7A85669E901E",)
(" 3EC61401-89CD-49C3-A0D9-7A85669E901E",)
[DEBUG] didUpdateNotification状态为特征CBC特征:0x1702a6c60,UUID = 3EC61401-89CD-49C3-A0D9-7A85669E901E,属性= 0x14,值=(null),通知= YES外设:CBPeripheral:0x1740fba80,identifier = 547BC3C9-4823-431C -B888-A8F3E8C699F5,name = Duo-ZKBY,state = connected
[DEBUG] didUpdateNotification state for characteristic:CBCharacteristic:0x1742a3c60,UUID = 3EC61402-89CD-49C3-A0D9-7A85669E901E,properties = 0x10,value =(null),notifying = YES on peripheral:CBPeripheral:0x1740fba80,identifier = 547BC3C9-4823- 431C-B888-A8F3E8C699F5,name = Duo-ZKBY,state = connected
答案 0 :(得分:4)
找到解决方案 - 在此发布以造福他人。
阅读Redbear Labs提供的文档,需要注意的关键是Command特性仅支持两种类型的属性 - PROPERTY_WRITE_NO_RESPONSE | PROPERTY_NOTIFY
同样,扫描特性仅支持PROPERTY_NOTIFY
此外,要让设备扫描所有可用的Wifi - 我们只应该向命令特性写入一个2字节命令[0x20, 0xA0]
- 相同的代码在下面
func scanWifi() {
print("[DEBUG] - Scanning for Wifi")
let command:[UInt8] = [0x02, 0xA0]
let commandData = NSData(bytes: command, length: command.count)
BLE.sharedInstance.writeTo(characteristic: BLE.sharedInstance.RBL_CHAR_CMD_UUID, data: commandData, withType: .withoutResponse)
}
无需写入扫描特性。当Wifi扫描开始时,扫描特征将发送值为0xB1
的通知以指示扫描开始,然后发送值为0xB2
的通知以指示扫描结束。
扫描的实际Wifi网络将通过命令特征本身的通知发送。
答案 1 :(得分:0)
致电
>>> dt=datetime.datetime(2019, 12, 24, 0, 0)
>>> dt.timetuple()
time.struct_time(tm_year=2019, tm_mon=12, tm_mday=24, tm_hour=0, tm_min=0, tm_sec=0, tm_wday=1, tm_yday=358, tm_isdst=-1)
您需要在此委托函数中调用read:
peripheral.writeValue(dataToWrite, for: char, type: .withResponse)