Can't read / write anything :

[JordyLeremon]

I followed one of your tutorials in order to scan a set of Bluetooth device it works very well but I will currently be able to read the characteristics of these devices and also write. I saw that you made a tutorial about it however I can't manage your tutorial, I can't use properly the functions read, write...
I want to read the data from my sensors without connecting to it because they don't allow the connection.
Can you help me please ?