# **Interchanging between Armourbit and Robotbit**

KOI supports both Robotbit and Armourbit, the only difference is in the initialization.

## KOI Initialization

![](../../functional_module/PWmodules/images/mcbanner.png)

### Load KOI Extension: https://github.com/KittenBot/pxt-koi

### [Loading Extensions](../../Makecode/powerBrickMC)

Initialization Blocks:

![](init/1.png)

For Armourbit users, choose "init powerbirck port".

![](init/2.png)

For Robobit users, choose "init Tx Rx"

![](init/3.png)

There are no difference between the 2 coding wise.

![](init/4.png)

### In the following tutorials, Robotbit will be used. Armourbit users can modify the code based on this guide.