How to activate i2c in orange pi zero?

For Developers
1

I have already run my orange pi zero almost completely thanks to https://github.com/melsem/openwrt-lede_xradio-xr819_soc-audio. But I still don't know how to operate the I2C ports, could someone please help me.

2

https://hyphop.github.io/mizy/ has it working.