M5Stack I2C Hub 1 to 6 Expansion Unit expands a single I2C HY2.0-4P interface and connects up to 6 I2C channels. This flexible solution allows slave devices with the same I2C address to be mounted (by polling control the different channels to achieve in-device coexistence). The I2C Hub 1 to 6 Expansion Unit offers an embedded PCA9548AP-I2C multi-channel switch IC and two LEGO compatible holes.