I'm trying to connect two iOS devices (iPhone 7, v13.2 and iPhone 5S v12.4.3) with a BLE chip with stack 02.12 of silicon Labs, but it does not work.
With previous version of stack (02.04) every device can correctly connect to. I can't figure out which is the problem. I tried using BlueGecko, BLEScanner and LightBlue apps but no one works.
With Android devices I have no problems.