How to writeValue forCharacteristic with response AND read response BLE
<p>I was told by the bluetooth manufacturer that I need to send the following to the peripheral: 'P'(0x50)</p>

<p>How do I do this with Objective-C and how do I get the response?</p>

<p>A code sample would be preferrable.</p>

<p>This almost answers my question, but doesn't give any code samples: <a href="https://stackoverflow.com/questions/23461061/peripheral-writevalue-forcharacteristic-type-return-null-error-and-value">peripheral writeValue: forCharacteristic: type: return null error and value</a></p>