What are I2C pins on ESP8266?

[lixplor]

Hi Xerxes3rd,

Thanks for your efforts on ESP8266 board for u8glib!
Could you tell me what are SCL and SDA pins on ESP8266?
There's no config for pins in u8glib. I think they are configured by default. And I checked arduino uno board and found that there are A4 and A5 as default pins for I2C. But ESP8266 does not have these pins.

Thanks a lot!

[Xerxes3rd]

They're any pins you want them to be. The I2C support in the ESP8266 is implemented in software, so it's bit-banging it, meaning you can use any pins you like. I can't remember which pins they default to, though- it may depend on which version of the SDK is in-use behind the scenes.