Get "value" from characteristic
<p>The following...</p>

<pre>    func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
        print(characteristic)
    }</pre>

<p>..outputs...</p>

<pre>&lt;CBCharacteristic: 0x1700b8180, UUID = FFE1, properties = 0x10, value = &lt;01&gt;, notifying = YES&gt;</pre>

<p>I want the "value" part "01".</p>