i have problem with this project i wan to send some data Arduino UNO R3 to Arduino Nano and show that data by OLED Display SH1106 128x64 how to transmit and recieve data ? I tried to do it many time but it failed my OLED can't recieve data
help me pls
Thank You 
Is the problem with communication? Then this may help:
How to configure 2 HC05 to communicate with each other. For more pages Google "hc05 to hc05 arduino".
Have you managed to write a sketch to display to the OLED by itself?
So what do think the problem might be?
No clue what the data is that has to be read by Uno?
No clue what Uno has to do with it once it is read?
No clue about Serial transmission by bluetooth?
No clue about serial reception by Bluetooth?
No clue about what Nano has to do with it?
The possibilities are practically endless, so no surprise that nothing turns up on the display.
And no code posted either.
This sounds very much like a "my boomerang won't come back" problem.
I'm already pair hc-05 it's blink but i don't understand why my OLED can't recieve data
Well we have no clue either. And you did not answer my question. Have you tried any examples that come with the library that you are using for the display (without any RF communication stuff)? Get the OLED working by itself then add the Bluetooth stuff.
Read the how to use the forum-please read sticky to see how to post code and some advice on how to get the most from the forum.