func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
for c in service.characteristics!{
print("---Characteristic found with UUID: \(c.uuid) \n")
let uuid = CBUUID(string: "2A19")//Battery Level
if c.uuid == uuid{
//peripheral.setNotifyValue(true, for: c)//Battery Level
peripheral.readValue(for: c)
}
}
}
}
func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
/* Battery Level */
if (characteristic.uuid == CBUUID(string: "2A19")) && (characteristic.value != nil){
let value = characteristic.value
let valueUint8 = [UInt8](value!)
print("\(valueUint8)")
print("\(valueUint8[0])")
let batteryLevel: Int32 = Int32(bitPattern: UInt32(valueUint8[0]))
print("\(batteryLevel)")
}
}
I can read Battery Level value, but how to update Battery Level when the value changed?
Why peripheral.setNotifyValue(true, for: c) can't update?
