title: How can i convert NSString to uint8_t array
body: <p>I have an NSString like so: 850210</p>
  
  <p>How can i convert it to uint8_t data[]={0x85,0x02,0x10};</p>
  
  <p>Could someone please help me out with this??</p>
  
  <p>BR,
  Suppi</p>