CODEWITHSUNDEEP
swiftcore-bluetooth
user2507194
user2507194

Reputation: 185

Swift BLE peripheral writeValue is not working

My current code is: 

@IBAction func sendData(sender: UISwitch) {
    if advertisingSwitch.on {
        var parameter = NSInteger(45)
        let data = NSData(bytes: &parameter, length: 1)
        if let connectedPeripheral = discoveredPeripheral {
            println("========= In connected peripheral \(connectedPeripheral)")
            //println("========= Send data is \(currentSendData)")
            println("========= Characteristic is \(sendDataCharacteristic)")
            println("========= data length is \(data.bytes)")
            self.sendDataToCentral(connectedPeripheral, characteristic: sendDataCharacteristic!, data: data)
        }
    }
}

private func sendDataToCentral(peripheral: CBPeripheral, characteristic: CBCharacteristic, data: NSData) {
    println("data is \(data)")
    peripheral.writeValue(data, forCharacteristic: characteristic, type: CBCharacteristicWriteType.WithoutResponse)
    println("writed characteristic \(characteristic)")
}

When I checked the Peripheral, it is connected showing:

BPeripheral: 0x1700ee980, identifier = E2377588-84CB-87ED-570A-B51614287B3C, name = TAv22u-FDF1, state = connected

The characteristic is getting from service scan with known UUID. I am sure the characteristic I got has function "write", which is 

<CBCharacteristic: 0x174086090, UUID = FFE9, properties = 0x8, value = (null), notifying = NO>

after I executing function:

peripheral.writeValue(data, forCharacteristic: characteristic, type: CBCharacteristicWriteType.WithoutResponse)

The value in characteristic is not changing. I don't know where did I get wrong.

Upvotes: 1

Views: 5163

Answers (1)

Deepak Tagadiya
Deepak Tagadiya

Reputation: 2245

peripheral.writeValue(data, forCharacteristic: characteristic, type: 
 CBCharacteristicWriteType.WithResponse)

try .withResponse and check what is response from peripheral.

Upvotes: 1

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