Using an Alternative I2C Address

Applicable Products

The information included in this post applies to Zymkey 4i and HSM4.

  1. You can change the I2C address through our standard APIs:
    C: zkSetI2CAddr
    Python: set_i2c_address

  2. The I2C communication between the Zymkey and the Host is encrypted, but will not interfere with other devices on the same bus (assuming there is no address conflict).