CubeCell slave mode i2c

Is possilble run CubeCell as i2c slave ?
I need it to communicate between 5 boards.

Bonmis

I email to support. And them reply me this.

CubeCell can’t working in the slave I2C device mode. Recommend use the software serial to communicate with other devices.

I look around source code in github and I found I2C slave is not implement.