# Using an Alternative I2C Address

**URL:** <https://community.zymbit.com/t/using-an-alternative-i2c-address/1044>\
**Category:** GENERAL\
**Created:** [December 12, 2020, 12:55am UTC](https://community.zymbit.com/t/using-an-alternative-i2c-address/1044 "2020-12-12T00:55:24Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Michelle\_of\_Zymbit](https://avatars.discourse-cdn.com/v4/letter/m/5e9695/32.png) [@Michelle\_of\_Zymbit](https://community.zymbit.com/u/Michelle_of_Zymbit)\
**Post date:** [December 12, 2020, 12:55am UTC](https://community.zymbit.com/t/using-an-alternative-i2c-address/1044/1 "2020-12-12T00:55:24Z")

</div>

### Applicable Products

The information included in this post applies to [Zymkey 4i](https://community.zymbit.com/c/zymkey/22) and [HSM4](https://community.zymbit.com/c/hsm4/21).

* * *

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).