communication between arduino to arduino by bluetooth

i have arduino some of uno and some of mega. and i have lot of AT-09(HM-10) which is bluetooth 4.0.
i heard that bluetooth 2.0 and 4.0 are different which 4.0 has BLE mode and works like broadcasting.

so i want to communicate between arduino and arduino which one is broadcasting and other one catch that signal and communicate like pairing or just like RF Radio so just receiving data only not writing.

i was looking on google but i just find only communication by bluetooth 2.0 to 2.0 or communicate with smartphone application.

i found arduinoBLE library but it's didn't support my board.

my question is, should i full packet header and tail when writing with softwareSerial or something useful library exsit?

or recomend to use with change to pairing mode?