title: Trouble reading data from OBD 2
body: <p>I am using OBD2 device to get data from different vehicles. Communication between the app and OBD2 is done using Bluetooth LE. 
  When I use an OBD2 device I get the service UUID = FFE0 and characteristic UUID = FFE1. I can use this characteristic to write PID and I am getting data from my car without any problem. 
  But when I use a different OBD2 I get service UUID = FFF0 and two characteristics with UUID FFE1(with property .write) and FFE2(with property .read). When I try to write a PID to the characteristic with write property I am getting error as </p>
  
  <blockquote>
    <p>Error Domain=CBATTErrorDomain Code=10 "The attribute could not be found."</p>
  </blockquote>
  
  <p>What will be going wrong? </p>