i have a ST7567S lcd display 128x64 i2c.
and i found this Iibrary:
i downloaded it and run the .ino file. nothing shows in display, i'm using it wrong?
How could we know?
Have you installed the library? In what way?
i just downloaded the ZIP, open it in desktop, and running the .ino file in it.
Check the wiring and I2C connection.
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It sounds like you have not installed the library
Which version of the IDE are you using ?
Wrong.
You need to install the library from the Sketch/Include Library/Add ZIP Library menu option.
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I do actually think what you've done is correct. But that is because the Github repo you have linked, isn't really a library, it's more of an example.
Scl is in A4 or A5?
and SDA?
I installed, but it still not showing nothing.
2.1.0
so any ideas of an library for ST7567S lcd i2c display?
Google "(your board) pinout"
The repo you've linked should give you usable code to work with, but you won't be able to install it like a library.
Scl is in A4 or A5?
and SDA?
A common suggestion would be to try adding pull-up resistors to your I2C lines:
https://learn.adafruit.com/working-with-i2c-devices/pull-up-resistors
Try the U8g2 that includes the st7567s i2c chip.
Good observation, I had not checked the link in question. 
what line of code if for that?
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