For those struggling with this; the ONLY think I could do to get this to work was add this line of code: tempButton.translatesAutoresizingMaskIntoConstraints = false

The first part from line 1 to 20 is to create the 0x082C, now that I see how it reads. But the value is 0x2c08. So how do I get the flags data if the first and second bit are swapped? How do I create the flags correctly to then read them? NSData *data = [characteristic value]; const uint8_t *byteData = [data bytes]; uint16_t flags = byteData[0]; I appreciate your help!