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adafruit / Adafruit_Python_SSD1306

Python library to use SSD1306-based 128x64 or 128x32 pixel OLED displays with a Raspberry Pi or Beaglebone Black.
MIT License
542 stars 283 forks source link

Documentation missing #6

Closed jwatte closed 9 years ago

jwatte commented 9 years ago

The documentation page doesn't completely document the steps necessary to make I2C work. Specifically, on a virgin Raspberry Pi, you need to do the following: Put a # comment in front of the blacklist i2c-bcm2708 line in /etc/modprobe.d/raspi-blacklist.conf Add the modules i2c-bcm2708 AND i2c-dev to the file /etc/modules <-- this took me a while to find out! Restart, or run modprobe to install the modules. After this, you can find the i2c bus using i2cscan -l. Before that, you will get "No such file or device" or similar errors.

tdicola commented 9 years ago

Oh thanks for the feedback and digging in to find the solution. It looks like this guide page should call out enabling I2C on the Pi like some later tutorials mention. Just updated the page here to call it out: https://learn.adafruit.com/ssd1306-oled-displays-with-raspberry-pi-and-beaglebone-black/wiring Thanks for raising the issue!