I lave read the previous post that subject is CC2540 BLE Central Device Disconnect with Reason code 62. http://e2e.ti.com/support/wireless_connectivity/f/538/t/208586.aspx. This post said that Reason 0x3E is "Connection Failed To Be Established" which could be due to bad link or bad connection parameters. How to avoid this disconnected happen. My system often disconnected with this issue. Thanks.