Problem with disconnects - can I improve this?

[jber1]

Hello, 

I have a device that I want to operate on the lower range of RSSI (but still around -80dBm  and have problems with disconnect. I would like to understand if there is any software change I can change to improve connection reliability. See attached source file for my BLE class.

Much appreciated!

Jens

FILE: 

s10_ble.cpp

[jber1]

A comment which is not obvious from the code. The message that is being sent roughly every 0.5s is small, just an int32.